CN105803352A

CN105803352A - Highly weather resistant environment-friendly stainless steel coffee pot material and preparation method thereof

Info

Publication number: CN105803352A
Application number: CN201610233600.1A
Authority: CN
Inventors: 焦德宏
Original assignee: Wanbaoli Stainless Steel Products (dongguan) Co Ltd
Current assignee: Wanbaoli Stainless Steel Products (dongguan) Co Ltd
Priority date: 2016-04-15
Filing date: 2016-04-15
Publication date: 2016-07-27

Abstract

The invention relates to the technical field of coffee pot materials, in particular to a highly weather resistant environment-friendly stainless steel coffee pot material and a preparation method thereof. The material comprises the following chemical components by weight percent: 0.11 to 0.15% of C, 0.32 to 0.36% of N, 0.4 to 0.8% of Si, 0.8 to 1.2% of Mn, 23 to 25% of Cr, 15 to 17% of Ni, 3.6 to 4.0% of Mo, 0.6 to 1.0% of Nb, 1.9 to 2.3% of Ti, 0.2 to 0.6% of Zn, 0.01 to 0.05% of Re, and 0.001 to 0.005% of B, and the balance being Fe and impurities. The stainless steel coffee pot material provided by the invention has relatively high weather resistance, environmental protection property, strength, toughness, hardness, abrasive resistance, heat resistance and corrosion resistance, and is excellent in comprehensive performance.

Description

A kind of high durable environmental protection rustless steel coffee pot material and preparation method thereof

Technical field

The present invention relates to coffee pot material technical field, be specifically related to a kind of high durable environmental protection rustless steel coffee pot material and Its preparation method.

Background technology

Coffee pot is the utensil of a kind of brewing coffee, and along with the raising of people's living standard, the range of coffee pot is more Coming the widest, the kind of coffee pot also gets more and more, and has rustless steel coffee pot, plastics coffee pot, glass coffee pot etc., rustless steel coffee Coffee kettle, owing to having higher toughness, intensity, wearability, thermostability and corrosion resistance, is the main sale kind on market.

Owing to the use environment of coffee pot is more special, rustless steel coffee pot needs the stainless steel with relatively high-weatherability Material manufactures, and stainless steel material of the prior art can't fully meet requirement that is currently used and that manufacture, there is weatherability Difference, the shortcoming such as not environmentally, it is therefore desirable to develop the stainless steel material of a kind of high durable and environmental protection.

Summary of the invention

In order to overcome shortcoming and defect present in prior art, it is an object of the invention to provide a kind of high durable environmental protection Rustless steel coffee pot material, this rustless steel coffee pot material has higher weatherability, an environmental protection, and also have higher intensity, Toughness, hardness, wearability, thermostability and corrosion resistance, excellent combination property.

Another object of the present invention is to provide the preparation method of a kind of high durable environmental protection rustless steel coffee pot material, this system Preparation Method uses with the material fit of the present invention, can play the optimum performance of material, and technique is simple, convenient operation and control, matter Amount is stable, and production efficiency is high, produces environmental protection, can large-scale industrial production.

The purpose of the present invention is achieved through the following technical solutions: a kind of high durable environmental protection rustless steel coffee pot material, and it is changed Study point element including following percentage by weight: C:0.11-0.15%, N:0.32-0.36%, Si:0.4-0.8%, Mn:0.8- 1.2%, Cr:23-25%, Ni:15-17%, Mo:3.6-4.0%, Nb:0.6-1.0%, Ti:1.9-2.3%, Zn:0.2-0.6%, Re: 0.01-0.05%, B:0.001-0.005%, surplus are ferrum and impurity.

Preferably, its chemical composition include the element of following percentage by weight: C:0.12-0.14%, N:0.33-0.35%, Si:0.5-0.7%, Mn:0.9-1.1%, Cr:23.5-24.5%, Ni:15.5-16.5%, Mo:3.7-3.9%, Nb:0.7-0.9%, Ti:2.0-2.2%, Zn:0.3-0.5%, Re:0.02-0.04%, B:0.002-0.004%, surplus are ferrum and impurity.

Being more highly preferred to, its chemical composition includes the element of following percentage by weight: C:0.13%, N:0.34%, Si: 0.6%, Mn:1.0%, Cr:24%, Ni:16%, Mo:3.8%, Nb:0.8%, Ti:2.1%, Zn:0.4%, Re:0.03%, B:0.003%, Surplus is ferrum and impurity.

The Design of Chemical Composition reason of the high durable environmental protection rustless steel coffee pot material of the present invention is as follows:

C:0.11-0.15%

C(carbon) it is that austenite strongly generates element, therefore make the ratio of the martensitic phase in metal structure increase, C can send out Wave solid solution strengthening effect, fuse in lattice structure with the form of interstitial solid solution, thus create and be introduced therein to strain, with by force Change the effect of interstitial solid solution；Additionally, C has forms Cottrel atmosphere so that dislocation in metal structure obtains the work of set With, thus improve the intensity of material, therefore, in order to be effectively improved the intensity of material, the percentage by weight of C should control More than 0.11%.But, C Cr, Nb, Ti easily and in steel etc. combines and forms carbide, such as, when existing at grain boundary When having Cr carbide, owing to Cr diffusion velocity in austenite is relatively slow, Cr depletion layer can be produced near crystal boundary so that material Toughness and corrosion resistance reduce, therefore, cause the toughness of material and corrosion resistance to decline in order to avoid C is too high, the weight hundred of C Proportion by subtraction should control below 0.15%.In the present invention, the percentage by weight of C is 0.11-0.15%, both can meet the intensity of material Requirement, can ensure that again toughness and the corrosion resistance of material, it is preferred that the percentage by weight of C is 0.12-0.14%, is more highly preferred to , the percentage by weight of C is 0.13%.

N:0.32-0.36%

N(nitrogen) it is one of the strongest effective element forming austenite, as C, N is also the element strengthening interstitial solid solution, And also it is the element forming Cottrel atmosphere；Additionally, N can also be combined to form cluster compound with Cr or Mo in steel, from And produce the effect improving intensity, in order to effectively make austenite phase stable by addition N, and by forming Mo-N cluster compound The intensity effectively making material improves, and the percentage by weight of N should control more than 0.32%.But, N consolidating in austenite phase Molten degree is restricted, and when adding larger amount of N, can produce pore when cast steel, although have high affine by adding with N The element (such as Cr or Mn) of power improves the limit of its solid solution, can suppress this phenomenon to a certain extent, but when adding During many such elements, need when steel is melted environmental condition (such as temperature etc.) is controlled, make cost increase, because of This, in order to avoid the too high increase of N is melted and the difficulty of casting, the percentage by weight of N should control below 0.36%.N in the present invention Percentage by weight be 0.32-0.36%, both can meet the requirement of strength of material, can ensure that again drawing abillity, excellent Choosing, the percentage by weight of N is 0.33-0.35%, is more highly preferred to, and the percentage by weight of N is 0.34%.

Si:0.4-0.8%

Si(silicon) it is ferrite former, play deoxidizer and improve the effect of material corrosion resistance, being also to increase steel simultaneously The element of intensity, Si can occur solid solution, thus produce and make stacking fault energy reduce and make the improved effect of mechanical property, therefore, In order to be effectively improved intensity and the corrosion resistance of material, and playing preferable deoxidation, the percentage by weight of Si should control More than 0.4%.But it is unfavorable to hot-workability and the toughness of material to add substantial amounts of Si, the most unfavorable to room temperature compacted under, in order to keep away Exempting from the too high hot-workability causing material of Si and toughness declines, the percentage by weight of Si should control below 0.8%.In the present invention The percentage by weight of Si is 0.4-0.8%, both can meet intensity and the corrosion resistance requirement of material, can ensure that again material Hot-workability and toughness, it is preferred that the percentage by weight of Si is 0.5-0.7%, is more highly preferred to, the percentage by weight of Si is 0.6%。

Mn:0.8-1.2%

Mn(manganese) it is austenite former, low cost, Ni can be substituted and form austenite, when steel is melted with refine, Mn It is used as deoxidizer, steel is had the biggest invigoration effect, the intensity of steel, hardness and wearability can be improved, in order to ensure material Intensity and hardness, the percentage by weight of Mn should control more than 0.8%.But, the non-oxidizability under high temperature can be produced not by Mn The effect of profit, makes the toughness of material and corrosion resistance reduce, causes in order to avoid Mn is too high under toughness and the corrosion resistance of material Fall, the percentage by weight of Mn should control below 1.2%.In the present invention, the percentage by weight of Mn is 0.8-1.2%, both can meet The intensity of material and hardness requirement, can ensure that again toughness and the corrosion resistance of material, it is preferred that the percentage by weight of Mn is 0.9-1.1%, is more highly preferred to, and the percentage by weight of Mn is 1.0%.

Cr:23-25%

Cr(chromium) it is strongly to form and stablize ferritic element, reduce austenitic area, along with in steel, Cr content increases, austenite Rustless steel may occur in which ferritic structure；Additionally, Cr is to improve the strength of materials and the main alloy element of corrosion resistance, Cr can carry High rustless steel corrosion resistance in oxidizing acid, improves its anticorrosion stress-resistant, spot corrosion and gap in chloride solution rotten The local corrosion abilities such as erosion, and the too low martensite transformation temperature (Ms) that also results in of Cr content raises, and affects the performance of steel, because of This, in order to ensure intensity and the corrosion resistance of material, the percentage by weight of Cr should control more than 23%.But Cr is improving steel Plasticity and the toughness of material can be reduced while intensity, if its too high levels, not only increase cost, affect economy, productivity ratio Decline, and unfavorable to weldability, the formability of some intermetallic phases also can be caused to increase, therefore, in order to avoid Cr is too high The plasticity and the toughness that cause material decline, and the percentage by weight of Cr should control below 25%.The percentage by weight of Cr in the present invention For 23-25%, both can meet intensity and the corrosion resistance requirement of material, can ensure that again plasticity and the toughness of material, preferably , the percentage by weight of Cr is 23.5-25.5%, is more highly preferred to, and the percentage by weight of Cr is 24%.

Ni:15-17%

Ni(nickel) it is to form austenite and the optimal element of stable austenite, Ni is to improving the decay resistance of material, mechanical property Can all there is positive effect with hot-working character, contribute to the performance of the corrosion-resistant effect of Cr；The interpolation of Ni simultaneously can also change The plasticity of kind ferritic stainless steel and toughness, amount can play the effect of solution strengthening time few, also can be with other element when measuring many Form precipitate, play the effect of ageing strengthening, in order to effectively make austenite phase stable by addition Ni, and improve material Intensity and corrosion resistance, the percentage by weight of Ni should control more than 15%.But add in a large number Ni can make Ms point be reduced to Common Quenching Treatment cannot obtain the situation of martensitic structure, thus also cannot make the high intensity required for steel acquisition, also The decay resistance that can make material reduces, and Ni shortage of resources, expensive, and should practice every conceivable frugality use, therefore, in order to avoid Ni The too high intensity causing material and corrosion resistance reduce and cost-effective, and the percentage by weight of Ni should control below 17%.This In invention, the percentage by weight of Ni is 15-17%, both can meet intensity and the corrosion resistance requirement of material, can save again life Produce cost, it is preferred that the percentage by weight of Ni is 15.5-16.5%, is more highly preferred to, and the percentage by weight of Ni is 16%.

Mo:3.6-4.0%

Mo(molybdenum) it is strong ferrite former, be conducive to improving the corrosion resistance of material, particularly Mo is conducive to improving The corrosion resistance of welding position punching shear plane, it is also possible to improve its intensity by solution strengthening, in order to improve the intensity of material And corrosion resistance, the percentage by weight of Mo should control more than 3.6%.But Mo is high cost element, and decay resistance reaches simultaneously After saturated, too high Mo content can promote the precipitation of intermetallic phase in austenitic stainless steel, affects mechanics and the processing of alloy Performance, it is contemplated that the deterioration of machinability and the increase of material cost, the percentage by weight of Mo should control below 4.0%.This The percentage by weight of bright middle Mo is 3.6-4.0%, both can meet intensity and the corrosion resistance requirement of material, can save again life Produce cost, it is preferred that the percentage by weight of Mo is 3.7-3.9%, is more highly preferred to, and the percentage by weight of Mo is 3.8%.

Nb:0.6-1.0%

Nb(niobium) it is ferrite former, the yield strength of material with crystal grain thinning, can be improved, add appropriate at material Nb, primarily serves two important function, one, plays the effect of stabilizing element, in heat-treatment temperature range, protect for a long time Temperature；In steel, Nb element is fully combined with C, forms C-Nb compound, it is to avoid the combination of C Yu Nb element, makes the corrosion-resistant of material Performance is guaranteed further；Its two, improve steel recrystallization temperature, make the crystal grain of steel refine, improve the tensile strength of steel And yield strength, therefore, in order to improve tensile strength and the yield strength of material, the percentage by weight of Nb should control 0.6% with On.But the manufacturing process that the refractory element Nb of excess can cause again material is complicated, causes the manufacture of material in order to avoid Nb is too high Complex process, the percentage by weight of Nb should control below 1.0%.In the present invention, the percentage by weight of Nb is 0.6-1.0%, both may be used To meet tensile strength and the yield strength requirement of material, again can be with Simplified flowsheet, it is preferred that the percentage by weight of Nb is 0.7- 0.9%, it is more highly preferred to, the percentage by weight of Nb is 0.8%.

Ti:1.9-2.3%

Ti(titanium) it is stabilizing element, be mainly combined with C, N and prevent C, N compound formation of Cr from causing Cr-depleted region, thus reduce The corrosion resistance of material, Ti is mainly combined with N；Ti can also improve the recrystallization temperature of steel, makes the crystal grain of steel refine, improves steel Tensile strength and yield strength, therefore, in order to improve tensile strength and the yield strength of material, the percentage by weight of Ti should be controlled System is more than 1.9%.But Ti also influences whether the surface quality of steel as field trash, simultaneously because Ti easy oxygen in adition process Changing, can bring certain difficulty to steel-making, in order to avoid Ti causes the manufacturing process complexity of material, the percentage by weight of Ti should control Below 2.3%.In the present invention, the percentage by weight of Ti is 1.9-2.3%, and tensile strength and the surrender that both can meet material are strong Degree requirement, can ensure that again the quality of material, simplifies manufacturing process, it is preferred that the percentage by weight of Ti is 2.0-2.2%, more Preferably, the percentage by weight of Ti is 2.1%.

Zn:0.2-0.6%

Zn is a kind of to have the good antibacterial element that sterilizes, and adds the Zn of more than 0.2% and i.e. can play in the material of the present invention Good antibiotic and sterilizing effect.But in the alloy of the present invention when the content of Zn more than 0.6% when, stainless hardness To have a declining tendency with intensity, and also be likely to result in the decline of weather resistance.In the present invention its content is defined to 0.2-0.6%.Preferably, the percentage by weight of Zn is 0.3-0.5%, is more highly preferred to, and the percentage by weight of Zn is 0.4%.

Re:0.01-0.05%

In ferritic stainless steel, RE(rhenium) by adsorbing carbon atom in a large number, make the total amount of ferritic stainless steel carbide precipitate Reduce, simultaneously by rotten field trash, make the fracture apperance of crackle source region there occurs change, thus improve steel impact flexibility and Weather resistance, therefore, in order to improve impact flexibility and the weather resistance of material, the percentage by weight of Re should control 0.01% with On.But too much addition Re, can react with the matrix of steel, form ferrum cerium brittlement phase, steel inclusion can be caused total simultaneously Amount increases, and affects the cleanliness factor of steel, causes toughness to decline, and therefore, causes the impact flexibility of material and resistance in order to avoid Re is too high Waiting hydraulic performance decline, the percentage by weight of Re should control below 0.05%.In the present invention, the percentage by weight of Re is 0.01- 0.05%, the impact flexibility of material and weather resistance can be made optimal.Preferably, the percentage by weight of Re is 0.02-0.04%, more For preferably, the percentage by weight of Re is 0.03%.

B:0.001-0.005%

Due to the minimizing of ferrite content in present component austenitic stainless steel, the easy segregation of impurity element S, P is at intergranular, and drops Its hot-workability low, forms micro-crack, therefore by adding boundary-strengthening element B(boron on surface) its weatherability can be improved Energy；The B of certain content can increase the forming core point in austenitic stainless steel process of setting, and can increase grain-boundary strength, thus It is possible to prevent the surface defect that causes owing between phase boundary plasticity is different, therefore, in order to improve the weather resistance of material and strong Degree, the percentage by weight of B should control more than 0.001%.But too high B content can promote intermetallic phase in austenitic stainless steel Precipitation, affect mechanics and the processing characteristics of alloy, cause in order to avoid B is too high the mechanics of material and processing characteristics to decline, B's Percentage by weight should control below 0.005%.In the present invention, the percentage by weight of B is 0.001-0.005, both can meet material The weatherability of material and requirement of strength, can meet again mechanical property and the processing characteristics of material, it is preferred that the percentage by weight of B For 0.002-0.004%, being more highly preferred to, the percentage by weight of B is 0.003%.

Preferably, by weight percentage, total content≤0.1% of described impurity, wherein, P≤0.015%, S≤ 0.008%、H≤0.003%、O≤0.001%。

P(phosphorus) and S(sulfur) it is all the oxious component in steel, under too high p and s content can cause the intensity of steel drastically Fall, can cause steel to become fragile, it is necessary to strict control.Therefore, the weight/mass percentage composition of the P that the present invention uses controls 0.015% Hereinafter, the weight/mass percentage composition of S controls below 0.008%.

H(hydrogen) and O(oxygen) toughness of material can be had a strong impact in stainless steel material, it is necessary to strictly control.Therefore, this The weight/mass percentage composition of the H of bright employing controls below 0.003%, and the weight/mass percentage composition of O controls below 0.001%.

Preferably, the chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.008- 0.012%, Ce:0.004-0.008% and Pr:0.001-0.005%.

Rare-earth elements La (lanthanum) joins in stainless steel material, thus it is possible to vary the composition of steel inclusion, form, distribution and Character, thus improve the various performances of steel, such as thermostability, toughness, weldability, wearability etc..Rare-earth elements La is to tufftride Process has the effect of oozing of significantly urging, and increases (γ) phase content in compound layer, and makes case hardness and wearability generation phase Should change；The heat resistance that La can improve, improves the corrosion resistance of material surface, and the appropriate La that adds can be effectively improved rushing of infiltration layer Hit toughness.In the present invention, the percentage by weight of La is 0.008-0.012%, both can meet the heat resistant requirements of material, the most permissible Meet corrosion resistance and the impact flexibility of material, it is preferred that the percentage by weight of La is 0.009-0.011%, is more highly preferred to, The percentage by weight of La is 0.010%.

Rare earth element ce (cerium) can be with the common effect of the Si in stainless steel material, it is ensured that material is at 1150 DEG C still There is good antioxygenic property；And the existence of the element such as N, C and Rare-Earth Ce so that it has hold suitable with nickel-base alloy Intensity for a long time, and N is precipitated with retarding action to the σ phase of fragility, improves material structure stability under the high temperature conditions.This Bright by controlling N and the content of Rare-Earth Ce in rustless steel, and reduce the content of O Yu S in rustless steel, thus ensure that alloy There is excellent thermostability and excellent plasticity, have and compare OCr₂₅Ni₂O more preferable applied at elevated temperature performance, substantially reduces Ni simultaneously Content, effectively saved resource, reduced manufacturing cost.In the present invention, the percentage by weight of Ce is 0.004-0.008%, Both can meet thermostability and the plasticity requirements of material, manufacturing cost can have been reduced again, it is preferred that the percentage by weight of Ce had been 0.005-0.007%, is more highly preferred to, and the percentage by weight of Ce is 0.006%.

In ferritic stainless steel, rare earth element Pr(praseodymium) by adsorbing carbon atom in a large number, make ferritic stainless steel separate out The total amount of carbide reduces, and simultaneously by rotten field trash, makes the fracture apperance of crackle source region there occurs change, thus improves steel Impact flexibility, therefore, in order to improve the impact flexibility of material, the percentage by weight of Pr should control more than 0.001%.But cross Many addition rare earth Pr, can react with the matrix of steel, form ferrum cerium brittlement phase, steel inclusion total amount can be caused simultaneously to increase Add, affect the cleanliness factor of steel, cause toughness to decline, therefore, cause the impact toughness decreased of material in order to avoid Pr is too high, Pr's Percentage by weight should control below 0.005%.In the present invention, the percentage by weight of Pr is 0.001-0.005%, can make material Impact flexibility performance optimal, it is preferred that the percentage by weight of Pr is 0.002-0.004%, is more highly preferred to, the weight hundred of Pr Proportion by subtraction is 0.003%.

The present invention is by adding tri-kinds of rare earth elements of La, Ce and Pr, it is possible to increase the mechanical strength of material and hardness, and increases Add wearability.

Preferably, the chemical composition of described material meets below equation:

0.45%≤C+N≤0.50% ... (1)

1.4%≤Si+Mn≤1.8% ... (2)

34.8≤Cr+Ni-Mo≤37.6% ... (3)

0.3%≤Nb/Ti≤0.5% ... (4)

0.25%≤Zn+Re+B≤0.6% ... (5)

Wherein, C, N, Si, Mn, Cr, Ni, Mo, Nb, Ti, Zn, Re and B represent the percentage by weight of each element respectively.

(1) (C+N) of formula is to affect the intensity of material, bending machining performance and welding position toughness and then impact weldering Connect the factor of position pressworkability, in the range of being limited to 0.45%-0.50% in the present invention.It is experimentally confirmed, as (C+ N), time less than 0.45%, the intensity of martensitic structure is too low, i.e. becomes the line and staff control of ferrite+martensite, and tensile strength is also More than 850MPa can not be reached.When (C+N) is more than 0.50%, owing to C, N make martensite significantly harden, when C, N content height, soft Ferrite and the difference of hardness of hard martensite very big, during bending machining, the distortion of its border savings, easily cracks, thus The bending machining performance of material and the toughness of welding position are significantly reduced；Additionally, when (C+N) is more than 0.50%, weld part Position pressworkability significantly reduce, welding position pressworkability reduce reason be welding after generate ferrite and In the line and staff control that martensite is constituted, due to the substantial amounts of C of solid solution in the martensite of the austenite phase transformation big from C, N solid solution ability, N, the intensity of martensite increases, and with soft ferritic intensity difference excessive causes.Therefore, go out from the intensity improving material Sending out, (C+N) should control more than 0.45%, and from improving drawing abillity, (C+N) should control below 0.50%.

(2) (Si+Mn) of formula is the factor of intensity and the toughness affecting material, is limited to 1.4-1.8% model in the present invention In enclosing.Being experimentally confirmed, when (Si+Mn) is less than 1.4%, the strength of materials obtained is poor, and deoxidation effect is bad；As (Si + Mn) more than 1.8% time, the materials hot working and the toughness that obtain are poor, therefore, from improving the intensity of material and deoxidation goes out Sending out, (Si+Mn) should control more than 1.4%, and from the hot-workability improving material and toughness, (Si+Mn) should control 1.8% Below.

(3) (Cr+Ni-Mo) of formula is the factor of intensity and the corrosion resistance affecting material, is limited in the present invention In the range of 34.8-37.6%.Cr, Ni and Mo have the effect of corrosion resistance, but the effect that Cr and Ni compounds use is more aobvious Writing, be experimentally confirmed, when (Cr+Ni-Mo) is less than 34.8%, the material corrosion resistance obtained is poor, and intensity is little；When (Cr+Ni-Mo), time more than 37.6%, the plasticity of material and toughness is caused to decline.Therefore, from improving the intensity of material and corrosion-resistant Property set out, (Cr+Ni-Mo) should control more than 34.8%, and from improving the plasticity of material and toughness, (Cr+Ni-Mo) should be controlled System is below 37.6%.

(4) (Nb/Ti) of formula is the factor of the strength and stability affecting material, is limited to 0.3%-in the present invention In the range of 0.5%.Being experimentally confirmed, when (Nb/Ti) is less than 0.3%, the strength of materials obtained is little, and less stable, when (Nb/Ti), time more than 0.5%, the manufacturing process of material is complicated, uneconomical.Therefore, go out from the strength and stability improving material Sending out, (Nb/Ti) should control more than 0.3%, and the manufacturing process of formed material of conforming to the principle of simplicity is set out, and (Nb/Ti) should control below 0.5%.

(5) (Zn+Re+B) of formula is the factor of intensity and the weatherability affecting material, is limited to 0.25%-in the present invention In the range of 0.6%.Being experimentally confirmed, when (Zn+Re+B) is less than 0.25%, the strength of materials obtained is little, and weatherability is poor, When (Zn+Re+B) is more than 0.6%, the manufacturing process of material is complicated, uneconomical.Therefore, from intensity and the weatherability improving material Setting out, (Zn+Re+B) should control more than 0.25%, and the manufacturing process of formed material of conforming to the principle of simplicity is set out, and (Zn+Re+B) should control Less than 0.6%.

Another object of the present invention is achieved through the following technical solutions: a kind of high durable environmental protection rustless steel coffee pot material Preparation method, comprises the steps:

A, vacuum induction are smelted: carry out under 0.5-2.5Pa vacuum through vaccum sensitive stove according to the proportioning of above-mentioned chemical composition Vacuum induction is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.1-0.5Pa vacuum, melting with 1.5-3.5Kg/min Speed carries out vacuum consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1080-1120 DEG C Homogenization Treatments, the process time is 32-40h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, opens forging temperature and is 980-1020 DEG C, final forging temperature For 820-860 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1000-1040 DEG C solution treatment, and the process time is 2-3h, Then oil is cooled to room temperature, obtains steel；

F, heat treatment: the steel after solution treatment are carried out heat treatment, prepare high durable environmental protection rustless steel coffee pot material.

Vacuum induction furnace smelting has the advantage that the alloy of smelting is pure, and performance level is high；The steel melted out and alloy Gas content is low；Metal is the most oxidizable；Material purity is high；Can accurately adjust and control chemical composition；The intensity of steel can be improved, And reduce the production cost of high-strength stainless steel finished product.

Homogenization Treatments, as improving the metallurgical quality of ingot blank and the means of extrusion performance, has had become as raising ingot at present The most important method of the metallurgical quality of base.Homogenization Treatments is to utilize to carry out long-time heating at high temperature, makes the chemistry one-tenth of inside Divide fully diffusion, be therefore also called diffusion annealing.The purpose of annealing is to eliminate tissue defects, improves tissue and makes composition uniform Change and crystal grain thinning, improve the mechanical property of steel, reduce residual stress, hardness can be improved simultaneously, improve plasticity and toughness, change Kind machinability.

Solution treatment refers to that alloy is heated to high temperature monophase field constant temperature to be kept, and makes surplus the most fully be dissolved in solid solution Rear quickly cooling, to obtain the Technology for Heating Processing of supersaturated solid solution.The effect of solution treatment mainly improves steel and alloy Intensity, plasticity and toughness；Various phases in alloy are made fully to dissolve, Intensive intervention body, and improve toughness and etch resistant properties, eliminating should Power and softening, in order to continue processing or molding.

Heat treatment refers to that alloy workpiece, through solution treatment, cold plastic deformation or casting, after forging, is placed in higher temperature Or room temperature keeps its performance, shape, the Technology for Heating Processing of size time to time change, the purpose of Ageing Treatment, eliminate workpiece Internal stress, stabilizing tissue and size, improve mechanical performance etc..

Preferably, in described step A, vacuum induction smelt processing step particularly as follows:

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 450-550 DEG C, vaccum sensitive stove is evacuated to 0.5-2.5Pa, with 6-8Kg/ The burn-off rate of min melts；

It is initially charged C and can provide sufficient C amount for C-O reaction, thus the beneficially gas purging such as N, O；Owing to Cr holds very much Easily being combined with N, be unfavorable for the removal of N in melt, therefore metal Cr must all reserve, and adds after N is qualified；Owing to metal Mn holds Volatile, therefore metal Cr must all reserve, and coming out of the stove, first few minutes adds.

After A2, material to be added all melt, carry out refine with the temperature of 1480-1520 DEG C, keep 50-70min；

Liquid level fusion keeps calmness when no longer having bubble to overflow, the most molten after, carry out refine.The temperature of refine is the highest, during refine Between the longest, degasifying effect is the best, and in melt, gas content is the lowest.But temperature is too high or overlong time, can aggravate crucible oxygen supply anti- Should, make oxygen content in steel increase on the contrary, the temperature of this time refine controls at 1480-1540 DEG C, and the retention time controls at 50- 70min。

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 6-8Kg/min；

Owing to Cr is easy to be combined with N, being unfavorable for the removal of N in melt, therefore metal Cr must all reserve, and adds after N is qualified Enter；Owing to this stage Cr addition is more, may bring more N into, therefore this stage needs to melt Cr at a slow speed, thus N is made to get rid of as far as possible.

A4, after Cr melts, again carry out refine with the temperature of 1480-1520 DEG C, refining time controls as 10-20min；

Liquid level fusion keeps calmness when no longer having bubble to overflow, the most molten after, carry out refine.The temperature of refine is the highest, during refine Between the longest, degasifying effect is the best, and in melt, gas content is the lowest.But temperature is too high or overlong time, can aggravate crucible oxygen supply anti- Should, make oxygen content in steel increase on the contrary, the temperature of this time refine controls at 1480-1540 DEG C, and the retention time controls at 10- 20min。

A5, according to above-mentioned chemical composition proportioning add Mn, under 1500-2000r/min rotating speed stir 1-3min, treat Mn After fusing, it is cast into consutrode.

Mn volatilizees very big in vacuum induction is smelted, and therefore metal Mn must all reserve, and coming out of the stove, first few minutes adds.

Preferably, in described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1000-1040 DEG C 40-80min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 40-80min at a temperature of-100～-140 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 600-640 DEG C 4-8h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 900-940 DEG C, be incubated 5-15min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 360-400 DEG C, be incubated 1-3h, air cooling to room temperature, prepared high durable ring Protect rustless steel coffee pot material.

A kind of high durable environmental protection rustless steel coffee pot, described rustless steel coffee pot is according to high durable environmental protection described above not Rust steel coffee pot material processes through cast molding and surface and prepares；Described surface process processing step particularly as follows:

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 8-12min in the degreasing fluid that temperature is 60-70 DEG C, and every liter of degreasing fluid is by following raw material group Become: sodium hydroxide 30-40g, sodium carbonate 20-30g, sodium phosphate 15-25g, iso-octyl sodium sulfate 2-4g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 3-5min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 60-100mL, hydrochloric acid 60-100mL, ethanol 60-100mL, sodium silicate 2- 4g, deionized water surplus；

(3) surface active: the rustless steel coffee pot after step (2) being processed is lived in the sulfuric acid solution that mass concentration is 6-10% Changing 10-20s, activation temperature is 60-70 DEG C；At room temperature clean 2-4min after activation with ultrasound wave, remove the corruption of specimen surface Erosion product；Solution used by ultrasonic waves for cleaning is made up of following raw material: dilute hydrochloric acid 30-40mL, sodium lauryl sulphate 35- 45mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then at 100-120 DEG C At a temperature of dry, cooling, prepare high durable environmental protection rustless steel coffee pot.

The beneficial effects of the present invention is: the high durable environmental protection rustless steel coffee pot material of the present invention adds Zn, Re and B Element, can significantly improve intensity and the weather resistance of material；Also reduce the production cost of material, and can save non-renewable Ni resource, belong to ep-type material.

The high durable environmental protection rustless steel coffee pot material of the present invention, compares with traditional similar material, and the present invention's is stainless Tensile strength >=the 1000Mpa of steel coffee pot material, yield strength >=850Mpa；Impact flexibility >=200J, fracture toughness >= 100MPa, elongation at break >=30%, hardness >=48HRC, also there is excellent decay resistance: 3.5%NaCl solution ring Corrosion rate >=the 0.0119mm/ of material under border, at 5%H₂S0₄Corrosion rate >=the 0.0374mm/ of material under solution environmental Year, good combination property, it is simple to processing, environmental protection.

The high durable environmental protection rustless steel coffee pot material of the present invention, its chemical composition include C, N, Si, Mn, Cr, Ni, Mo, Nb, Ti, Zn, Re and B, surplus is ferrum and impurity, by the strict content controlling every kind of element, makes material have higher tension Intensity and yield strength, produce environmental protection, and also have higher toughness, hardness, wearability, thermostability and corrosion resistance, comprehensively Excellent performance.

The preparation method of the present invention uses the steps such as vacuum induction smelting, Homogenization Treatments, solution treatment and heat treatment, all Can improve the intensity of steel, and reduce the production cost of high-strength stainless steel finished product, and have preferable plasticity, satisfied deformation to add The needs of work.

The preparation method of the present invention uses with the material fit of the present invention, can play the optimum performance of material, technique letter Single, convenient operation and control, steady quality, production efficiency is high, produces environmental protection, can large-scale industrial production.

Detailed description of the invention

For the ease of the understanding of those skilled in the art, below in conjunction with embodiment, the present invention is further illustrated, real The content that the mode of executing is mentioned not limitation of the invention.

Embodiment 1

A kind of high durable environmental protection rustless steel coffee pot material, its chemical composition includes the element of following percentage by weight: C: 0.11%, N:0.36%, Si:0.4%, Mn:1.2%, Cr:23%, Ni:17%, Mo:4.0%, Nb:0.6%, Ti:1.9%, Zn:0.2%, Re:0.05%, B:0.005%, surplus are ferrum and impurity；By weight percentage, total content≤0.1% of described impurity, wherein, P ≤0.015%、S≤0.008%、H≤0.003%、O≤0.001%。

The chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.008%, Ce:0.004% And Pr:0.001%.

The preparation method of a kind of high durable environmental protection rustless steel coffee pot material, comprises the steps:

A, vacuum induction are smelted: carry out vacuum according to the proportioning of above-mentioned chemical composition under 0.5Pa vacuum through vaccum sensitive stove Sensing is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.1Pa vacuum, carry out very with the molten speed of 1.5Kg/min Empty consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1080 DEG C Homogenization Treatments, the process time is 40h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, and opening forging temperature is 980 DEG C, and final forging temperature is 820 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1000 DEG C solution treatment, and the process time is 3h, the most oily cold To room temperature, obtain steel；

In described step A, vacuum induction smelt processing step particularly as follows:

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 450 DEG C, vaccum sensitive stove is evacuated to 0.5Pa, with the fusing of 6Kg/min Speed melts；

After A2, material to be added all melt, carry out refine with the temperature of 1480 DEG C, keep 70min；

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 6Kg/min；

A4, after Cr melts, again carry out refine with the temperature of 1480 DEG C, refining time controls as 20min；

A5, according to above-mentioned chemical composition proportioning add Mn, under 1500r/min rotating speed stir 3min, until Mn melt after, casting Become consutrode.

In described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1000 DEG C 80min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 80min at a temperature of-100 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 600 DEG C 8h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 900 DEG C, be incubated 15min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 360 DEG C, be incubated 3h, air cooling is to room temperature, and prepared high durable environmental protection is stainless Steel coffee pot material.

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 12min in the degreasing fluid that temperature is 70 DEG C, and every liter of degreasing fluid is made up of following raw material: hydrogen Sodium oxide 30g, sodium carbonate 20g, sodium phosphate 15g, iso-octyl sodium sulfate 2g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 3min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 60mL, hydrochloric acid 60mL, ethanol 60mL, sodium silicate 2g, deionized water surplus；

(3) surface active: the rustless steel coffee pot after step (2) being processed activates in the sulfuric acid solution that mass concentration is 6% 20s, activation temperature is 60 DEG C；At room temperature clean 2min after activation with ultrasound wave, remove the corrosion product of specimen surface；Ultrasonic Solution used by ripple cleaning is made up of following raw material: dilute hydrochloric acid 30mL, sodium lauryl sulphate 35mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then 100 DEG C of temperature Lower drying, cooling, prepare high durable environmental protection rustless steel coffee pot.

Embodiment 2

A kind of high durable environmental protection rustless steel coffee pot material, its chemical composition includes the element of following percentage by weight: C: 0.12%, N:0.35%, Si:0.5%, Mn:1.1%, Cr:23.5%, Ni:16.5%, Mo:3.9%, Nb:0.7%, Ti:2.0%, Zn: 0.3%, Re:0.04%, B:0.004%, surplus are ferrum and impurity；By weight percentage, total content≤0.1% of described impurity, Wherein, P≤0.015%, S≤0.008%, H≤0.003%, O≤0.001%.

The chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.009%, Ce:0.005% And Pr:0.002%.

A, vacuum induction are smelted: carry out vacuum according to the proportioning of above-mentioned chemical composition under 1.0Pa vacuum through vaccum sensitive stove Sensing is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.2Pa vacuum, carry out very with the molten speed of 2.0Kg/min Empty consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1090 DEG C Homogenization Treatments, the process time is 38h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, and opening forging temperature is 990 DEG C, and final forging temperature is 830 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1010 DEG C solution treatment, and the process time is 2.8h, then oil It is cooled to room temperature, obtains steel；

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 480 DEG C, vaccum sensitive stove is evacuated to 1.0Pa, melting with 6.5Kg/min Change speed to melt；

After A2, material to be added all melt, carry out refine with the temperature of 1490 DEG C, keep 65min；

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 6.5Kg/min；

A4, after Cr melts, again carry out refine with the temperature of 1490 DEG C, refining time controls as 18min；

A5, according to above-mentioned chemical composition proportioning add Mn, under 1600r/min rotating speed stir 2.5min, until Mn melt after, water Cast consutrode.

In described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1010 DEG C 70min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 70min at a temperature of-110 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 610 DEG C 7h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 910 DEG C, be incubated 12min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 370 DEG C, be incubated 2.5h, air cooling is to room temperature, and prepared high durable environmental protection is not Rust steel coffee pot material.

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 11min in the degreasing fluid that temperature is 62 DEG C, and every liter of degreasing fluid is made up of following raw material: hydrogen Sodium oxide 32g, sodium carbonate 22g, sodium phosphate 18g, iso-octyl sodium sulfate 2.5g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 3.5min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 70mL, hydrochloric acid 70mL, ethanol 70mL, sodium silicate 2.5g, more than deionized water Amount；

(3) surface active: the rustless steel coffee pot after step (2) being processed activates in the sulfuric acid solution that mass concentration is 7% 18s, activation temperature is 62 DEG C；At room temperature clean 2.5min after activation with ultrasound wave, remove the corrosion product of specimen surface；Super Solution used by sound wave cleaning is made up of following raw material: dilute hydrochloric acid 32mL, sodium lauryl sulphate 38mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then 105 DEG C of temperature Lower drying, cooling, prepare high durable environmental protection rustless steel coffee pot.

Embodiment 3

A kind of high durable environmental protection rustless steel coffee pot material, its chemical composition includes the element of following percentage by weight: C: 0.13%, N:0.34%, Si:0.6%, Mn:1.0%, Cr:24%, Ni:16%, Mo:3.8%, Nb:0.8%, Ti:2.1%, Zn:0.4%, Re:0.03%, B:0.003%, surplus are ferrum and impurity；By weight percentage, total content≤0.1% of described impurity, wherein, P ≤0.015%、S≤0.008%、H≤0.003%、O≤0.001%。

The chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.01%, Ce:0.006% and Pr:0.003%.

A, vacuum induction are smelted: carry out vacuum according to the proportioning of above-mentioned chemical composition under 1.5Pa vacuum through vaccum sensitive stove Sensing is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.3Pa vacuum, carry out very with the molten speed of 2.5Kg/min Empty consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1100 DEG C Homogenization Treatments, the process time is 36h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, and opening forging temperature is 1000 DEG C, and final forging temperature is 840 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1020 DEG C solution treatment, and the process time is 2.5h, then oil It is cooled to room temperature, obtains steel；

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 500 DEG C, vaccum sensitive stove is evacuated to 1.5Pa, with the fusing of 7Kg/min Speed melts；

After A2, material to be added all melt, carry out refine with the temperature of 1500 DEG C, keep 60min；

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 7Kg/min；

A4, after Cr melts, again carry out refine with the temperature of 1500 DEG C, refining time controls as 15min；

A5, according to above-mentioned chemical composition proportioning add Mn, under 1800r/min rotating speed stir 2min, until Mn melt after, casting Become consutrode.

In described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1020 DEG C 60min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 60min at a temperature of-120 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 620 DEG C 6h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 920 DEG C, be incubated 10min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 380 DEG C, be incubated 2h, air cooling is to room temperature, and prepared high durable environmental protection is stainless Steel coffee pot material.

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 10min in the degreasing fluid that temperature is 65 DEG C, and every liter of degreasing fluid is made up of following raw material: hydrogen Sodium oxide 35g, sodium carbonate 25g, sodium phosphate 20g, iso-octyl sodium sulfate 3g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 4min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 80mL, hydrochloric acid 80mL, ethanol 80mL, sodium silicate 3g, deionized water surplus；

(3) surface active: the rustless steel coffee pot after step (2) being processed activates in the sulfuric acid solution that mass concentration is 8% 15s, activation temperature is 65 DEG C；At room temperature clean 3min after activation with ultrasound wave, remove the corrosion product of specimen surface；Ultrasonic Solution used by ripple cleaning is made up of following raw material: dilute hydrochloric acid 35mL, sodium lauryl sulphate 40mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then 110 DEG C of temperature Lower drying, cooling, prepare high durable environmental protection rustless steel coffee pot.

Embodiment 4

A kind of high durable environmental protection rustless steel coffee pot material, its chemical composition includes the element of following percentage by weight: C: 0.14%, N:0.33%, Si:0.7%, Mn:0.9%, Cr:24.5%, Ni:15.5%, Mo:3.7%, Nb:0.9%, Ti:2.2%, Zn: 0.5%, Re:0.02%, B:0.002%, surplus are ferrum and impurity；By weight percentage, total content≤0.1% of described impurity, Wherein, P≤0.015%, S≤0.008%, H≤0.003%, O≤0.001%.

The chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.011%, Ce:0.007% And Pr:0.004%.

A, vacuum induction are smelted: carry out vacuum according to the proportioning of above-mentioned chemical composition under 2.0Pa vacuum through vaccum sensitive stove Sensing is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.4Pa vacuum, carry out very with the molten speed of 3.0Kg/min Empty consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1110 DEG C Homogenization Treatments, the process time is 34h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, and opening forging temperature is 1010 DEG C, and final forging temperature is 850 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1030 DEG C solution treatment, and the process time is 2.2h, then oil It is cooled to room temperature, obtains steel；

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 520 DEG C, vaccum sensitive stove is evacuated to 2.0Pa, melting with 7.5Kg/min Change speed to melt；

After A2, material to be added all melt, carry out refine with the temperature of 1510 DEG C, keep 65min；

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 7.5Kg/min；

A4, after Cr melts, again carry out refine with the temperature of 1510 DEG C, refining time controls as 12min；

A5, according to above-mentioned chemical composition proportioning add Mn, under 1900r/min rotating speed stir 1.5min, until Mn melt after, water Cast consutrode.

In described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1030 DEG C 50min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 50min at a temperature of-130 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 630 DEG C 5h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 930 DEG C, be incubated 8min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 390 DEG C, be incubated 1.5h, air cooling is to room temperature, and prepared high durable environmental protection is not Rust steel coffee pot material.

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 9min in the degreasing fluid that temperature is 68 DEG C, and every liter of degreasing fluid is made up of following raw material: hydrogen-oxygen Change sodium 38g, sodium carbonate 28g, sodium phosphate 22g, iso-octyl sodium sulfate 3.5g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 4.5min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 90mL, hydrochloric acid 90mL, ethanol 90mL, sodium silicate 3.5g, more than deionized water Amount；

(3) surface active: the rustless steel coffee pot after step (2) being processed activates in the sulfuric acid solution that mass concentration is 9% 12s, activation temperature is 68 DEG C；At room temperature clean 3.5min after activation with ultrasound wave, remove the corrosion product of specimen surface；Super Solution used by sound wave cleaning is made up of following raw material: dilute hydrochloric acid 38mL, sodium lauryl sulphate 42mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then 115 DEG C of temperature Lower drying, cooling, prepare high durable environmental protection rustless steel coffee pot.

Embodiment 5

A kind of high durable environmental protection rustless steel coffee pot material, its chemical composition includes the element of following percentage by weight: C: 0.15%, N:0.32%, Si:0.8%, Mn:0.8%, Cr:25%, Ni:15%, Mo:3.6%, Nb:1.0%, Ti:2.3%, Zn:0.6%, Re:0.01%, B:0.001%, surplus are ferrum and impurity；By weight percentage, total content≤0.1% of described impurity, wherein, P ≤0.015%、S≤0.008%、H≤0.003%、O≤0.001%。

The chemical composition of described material also includes the rare earth element of following percentage by weight: La:0.012%, Ce:0.008% And Pr:0.005%.

A, vacuum induction are smelted: carry out vacuum according to the proportioning of above-mentioned chemical composition under 2.5Pa vacuum through vaccum sensitive stove Sensing is smelted, and is cast into consutrode；

B, vacuum consumable remelting: by the consutrode after casting under 0.5Pa vacuum, carry out very with the molten speed of 3.5Kg/min Empty consumable remelting, obtains molten steel；

C, Homogenization Treatments: the molten steel after remelting carries out at a temperature of 1120 DEG C Homogenization Treatments, the process time is 32h；

D forging is become a useful person: the molten steel after Homogenization Treatments is carried out alloy forging, and opening forging temperature is 1020 DEG C, and final forging temperature is 860 DEG C, obtain forging rod；

E, solution treatment: the forging rod after forging is carried out at a temperature of 1040 DEG C solution treatment, and the process time is 2h, the most oily cold To room temperature, obtain steel；

A1, proportioning according to above-mentioned chemical composition, first load crucible by C, is then loaded by remaining element in addition to Cr, Mn, Put in vaccum sensitive stove, crucible is preheated to 550 DEG C, vaccum sensitive stove is evacuated to 2.5Pa, with the fusing of 8Kg/min Speed melts；

After A2, material to be added all melt, carry out refine with the temperature of 1520 DEG C, keep 50min；

A3, according to above-mentioned chemical composition proportioning add Cr, continue melt with the burn-off rate of 8Kg/min；

A4, after Cr melts, again carry out refine with the temperature of 1520 DEG C, refining time controls as 10min；

A5, according to above-mentioned chemical composition proportioning add Mn, under 2000r/min rotating speed stir 1min, until Mn melt after, casting Become consutrode.

In described step F, process of thermal treatment step particularly as follows:

F1, the steel after solution treatment being incubated at a temperature of 1040 DEG C 40min, oil is cooled to room temperature；

F2, by step F1 cool down after steel cold treatment 40min at a temperature of-140 DEG C；

F3, the steel after the cold treatment of step F2 being incubated at a temperature of 640 DEG C 4h, air cooling is to room temperature；

F4, step F3 is cooled down after steel at a temperature of 940 DEG C, be incubated 5min, water-cooled or oil be cooled to room temperature；

F5, step F4 is cooled down after steel at a temperature of 400 DEG C, be incubated 1h, air cooling is to room temperature, and prepared high durable environmental protection is stainless Steel coffee pot material.

(1) pretreatment: first with sand papering rustless steel coffee pot, then carry out oil removal treatment, then the oil removing of residual is removed in washing Liquid；Described oil removal treatment is oil removing 8min in the degreasing fluid that temperature is 70 DEG C, and every liter of degreasing fluid is made up of following raw material: hydrogen-oxygen Change sodium 40g, sodium carbonate 30g, sodium phosphate 25g, iso-octyl sodium sulfate 4g, deionized water surplus；

(2) pickling membrane removal: step (1) pretreated rustless steel coffee pot is at room temperature used water after nitration mixture pickling 5min Wash；Every liter of degreasing fluid is made up of following raw material: sulphuric acid 100mL, hydrochloric acid 100mL, ethanol 100mL, sodium silicate 4g, more than deionized water Amount；

(3) surface active: the rustless steel coffee pot after step (2) being processed activates in the sulfuric acid solution that mass concentration is 10% 10s, activation temperature is 70 DEG C；At room temperature clean 4min after activation with ultrasound wave, remove the corrosion product of specimen surface；Ultrasonic Solution used by ripple cleaning is made up of following raw material: dilute hydrochloric acid 40mL, sodium lauryl sulphate 45mg, deionized water surplus；

(4) drying is rinsed: the rustless steel coffee pot after step (3) being processed is first clean by cold water flush, then 120 DEG C of temperature Lower drying, cooling, prepare high durable environmental protection rustless steel coffee pot.

The mechanical and physical performance of the high durable environmental protection rustless steel coffee pot material that embodiment 1-5 prepares is as shown in table 1.

Table 1

The high durable environmental protection rustless steel coffee pot material of the present invention, compares with traditional similar material, the rustless steel coffee of the present invention Tensile strength >=the 1000Mpa of coffee kettle material, yield strength >=850Mpa；Impact flexibility >=200J, fracture toughness >=100MPa, elongation at break >=30%, hardness >=48HRC, also there is excellent decay resistance: material under 3.5%NaCl solution environmental Corrosion rate >=the 0.0119mm/ of material, at 5%H₂S0₄Corrosion rate >=the 0.0374mm/ of material under solution environmental, well Combination property, it is simple to processing, environmental protection.

Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can realize with alternate manner, Without departing from obvious replacement any on the premise of present inventive concept all within protection scope of the present invention.

Claims

1. a high durable environmental protection rustless steel coffee pot material, it is characterised in that: its chemical composition includes following percentage by weight Element: C:0.11-0.15%, N:0.32-0.36%, Si:0.4-0.8%, Mn:0.8-1.2%, Cr:23-25%, Ni:15-17%, Mo:3.6-4.0%, Nb:0.6-1.0%, Ti:1.9-2.3%, Zn:0.2-0.6%, Re:0.01-0.05%, B:0.001-0.005%, Surplus is ferrum and impurity.

A kind of high durable environmental protection rustless steel coffee pot material the most according to claim 1, it is characterised in that: its chemical composition Element including following percentage by weight: C:0.12-0.14%, N:0.33-0.35%, Si:0.5-0.7%, Mn:0.9-1.1%, Cr:23.5-24.5%, Ni:15.5-16.5%, Mo:3.7-3.9%, Nb:0.7-0.9%, Ti:2.0-2.2%, Zn:0.3-0.5%, Re:0.02-0.04%, B:0.002-0.004%, surplus are ferrum and impurity.

A kind of high durable environmental protection rustless steel coffee pot material the most according to claim 1, it is characterised in that: its chemical composition Element including following percentage by weight: C:0.13%, N:0.34%, Si:0.6%, Mn:1.0%, Cr:24%, Ni:16%, Mo: 3.8%, Nb:0.8%, Ti:2.1%, Zn:0.4%, Re:0.03%, B:0.003%, surplus are ferrum and impurity.

A kind of high durable environmental protection rustless steel coffee pot material the most according to claim 1, it is characterised in that: with weight percent Than counting, total content≤0.1% of described impurity, wherein, P≤0.015%, S≤0.008%, H≤0.003%, O≤0.001%.

A kind of high durable environmental protection rustless steel coffee pot material the most according to claim 1, it is characterised in that: described material Chemical composition also includes the rare earth element of following percentage by weight: La:0.008-0.012%, Ce:0.004-0.008% and Pr: 0.001-0.005%。

A kind of high durable environmental protection rustless steel coffee pot material the most according to claim 1, it is characterised in that: described material Chemical composition meets below equation:

0.45%≤C+N≤0.50% ... (1)

1.4%≤Si+Mn≤1.8% ... (2)

34.8≤Cr+Ni-Mo≤37.6% ... (3)

0.3%≤Nb/Ti≤0.5% ... (4)

0.25%≤Zn+Re+B≤0.6% ... (5)

7. the preparation method of a kind of high durable environmental protection rustless steel coffee pot material as described in any one of claim 1-6, it is special Levy and be: comprise the steps:

The preparation method of a kind of high durable environmental protection rustless steel coffee pot material the most according to claim 7, it is characterised in that: In described step A, vacuum induction smelt processing step particularly as follows:

A5, according to above-mentioned chemical composition proportioning add Mn, under 1500-2000r/min rotating speed stir 1-3min, treat that Mn melts After, it is cast into consutrode.

The preparation method of a kind of high durable environmental protection rustless steel coffee pot material the most according to claim 7, it is characterised in that: In described step F, process of thermal treatment step particularly as follows:

10. a high durable environmental protection rustless steel coffee pot, it is characterised in that: described rustless steel coffee pot is according to claim 1-6 High durable environmental protection rustless steel coffee pot material described in any one processes through cast molding and surface and prepares；Described surface processes Processing step particularly as follows: