CN106755723B - A kind of corrosion-and high-temp-resistant alloy steel material and preparation method - Google Patents

A kind of corrosion-and high-temp-resistant alloy steel material and preparation method Download PDF

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CN106755723B
CN106755723B CN201611105513.4A CN201611105513A CN106755723B CN 106755723 B CN106755723 B CN 106755723B CN 201611105513 A CN201611105513 A CN 201611105513A CN 106755723 B CN106755723 B CN 106755723B
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steel
alloy
molten steel
chromium
temperature
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CN106755723A (en
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王允星
符寒光
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Shandong Gold Ocean Heavy Industry Science And Technology Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel
    • C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys

Abstract

A kind of corrosion-and high-temp-resistant alloy steel material and preparation method, belong to technical field of metal material preparation.Using electro-smelting, first using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in medium-frequency induction furnace, the steel alloy molten steel containing aluminium, chromium, silicon is obtained by electro-smelting, ingredient is 0.12~0.19%C, 12.2~12.7%Al, 27.1~27.9%Cr, 6.9~7.7%Si<0.4%Mn,<0.03%S,<0.03%P, surplus Fe, then molten steel temperature is heated to 1628~1646 DEG C, then ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy are sequentially added, after molten steel fully enters ladle, it is inserted into multicomponent alloy line, and pour into casting, after stress relief annealing, the material of acquisition has excellent high-temperature corrosion resistance ability.

Description

A kind of corrosion-and high-temp-resistant alloy steel material and preparation method
Technical field
The invention discloses a kind of alloy steel material, more particularly to a kind of corrosion-and high-temp-resistant alloy steel material and its preparation Method belongs to technical field of metal material preparation.
Background technology
In the fields such as petrochemical industry, the energy, power, metallurgy, aerospace generally existing High Temperature Corrosion, high temperature corrosion The very big consumption for causing material, seriously affects the safe handling of component, improves the high temperature corrosion property of material, it has also become the world The important scientific problems of various countries' general concern.In order to improve the corrosion-and high-temp-resistant energy of metal material, Chinese invention patent CN 105420625 disclose a kind of stainless steel pump valve casting of oxidative resistance medium high temperature corrosion, and the stainless cast steel part is in mild steel Have the dosage for having properly increased the elements such as B, Zr, Mg on the basis of excellent toughness and plasticity, it is good to impart casting material Mechanical property, processability is good, and thermal stability is good, there is excellent oxidation resistance to Oxidant, improves pump valve service life, Ensure that production is complete, what is be added in melt is answered by ceramic honey comb powder load nanosizing Ca-RE mesophase alloys powder and graphene It is more stable to close refining agent performance in molten steel, removal of impurities slugging is efficient, can effectively improve the degree of purity of molten steel, so as to improve The quality of casting, prevents shrinkage cavity and cracking, and the stainless Steel Properties obtained after being repeatedly heat-treated are stablized, and have reached energy-efficient Production effect.Chinese invention patent CN 105154793 also discloses a kind of high intensity, high anti-corrosion two-phase heat resisting steel, chemistry at It is divided into：C：0~0.1；Si：0.1~1.0；Mn：0~0.5；Cr：12~25；Ni：15~22；Mo：0~4.0；Al：1.0~ 6.0；Nb：0.1~1.0；B：0~0.05；P is not more than 0.03；S is not more than 0.02；Surplus is Fe.The feature of preparation method exists In fusion process strictly controls vacuum degree≤5Pa, to avoid the adverse effect of N and Al compounds；Using open die forging mode, heat It rolls process control strain rate and is not less than 1s-1；Single pass rolling reduction is not less than 35%, and the second phase ruler is controlled using being quickly cooled down It is very little.The invention realizes the matching of anti-corrosion property at high temperature and high intensity, is used in high temperature corrosion environment, material it is comprehensive Existing two-phase heat resisting steel can be substantially better than.Chinese invention patent CN 104694825 also discloses a kind of erosion resistant foundry high-carbon steel And preparation method thereof, which is made of by weight percentage following chemical composition：Carbon 0.8-1.2%, silicon 1.2- 1.6%, manganese 0.5-0.8%, copper 1.5-1.8%, titanium 0.3-0.5%, aluminium 0.15-0.18%, boron 0.08-0.15%, Mo0.1- 0.3%, N0.10-0.20%, P≤0.02%, S≤0.02%, surplus are iron.Preparation method：(1) it smelts；(2) when molten steel temperature Degree is when reaching 1500-1550 DEG C, sequentially add the metallic aluminium of the 1.6-1.8% of steel quality score, the ferrosilicon of 1.2-1.5%, The ferromanganese of the ferro-boron of 0.1-0.3%, the ferrotianium of 0.2-0.5% and 0.8-1.5%, then by molten steel heating to 1600-1650 DEG C, Heat preservation is come out of the stove after 2-3 hours, and molten steel is injected casting ladle；(3) microalloy treatment is carried out；(4) it skims, pours into casting mold；(5) at heat Reason.By being rationally arranged proportioning and preparation process, the casting high-carbon steel of formation has high intensity, hardness, resistance to big for the invention The advantages of gas corrosion is good and high-temperature corrosion resistance performance.Chinese invention patent CN 102510909 also discloses a kind of with excellent The austenite stainless steel of high-temperature corrosion resistance heat fatigue cracking.The austenite stainless steel contains Cr in terms of quality %： 15.0%~23.0%, Ni：6.0%~20.0%, surface section is covered with adding for the high-energy density of 5 μm~30 μm of average thickness Work layer.Chinese invention patent CN 103667917 also discloses a kind of High-temperature-reslow-carbon low-carbon steel material, the chemical element contained at Divide and its mass percent is：Carbon 0.1-0.25, zinc 4.0-4.5, aluminium 1.3-1.5, copper 2.6-2.9, magnesium 3.0-3.2, Si0.6- 0.8, Mn6.3-6.5, B0.005-0.008, Ti0.03-0.05, P≤0.030, S≤0.030, surplus are iron.The invention passes through Using material combinations such as aluminium, magnesium, order, the alloy material tool of formation are launched in rationally setting proportioning and production technology, rationally setting There is the features such as excellent high-temperature corrosion resistance, high temperature non-scale, toughness and plasticity are good, intensity and hardness are high, wearability is good；And make Use part scrap iron as raw material, the stable quality for improving alloy is uniform.By the way that refining agent is added, degree of porosity reduces 1-2 degree.China Patent of invention CN 103643173 also discloses a kind of High temperature corrosion-resistant pump valve alloy steel material, the chemical element component contained And its mass percent is：Carbon 1.2-1.5, silicon 1.4-1.7, manganese 6.7-7.2, chromium 7.2-7.5, vanadium 3.2-3.5, Be0.12- 0.15, La0.08-0.10, S≤0.05, P≤0.05, surplus are iron.Be, vanadium, chromium, La are added in the invention on the basis of high-carbon steel Equal alloying elements so that steel alloy not only has high hardness and wear-resisting property, but also has preferable toughness, and high temperature resistant is rotten Erosion.The invention refining agent is used for Foundry Production, hence it is evident that the degree of porosity improved in yield rate, especially casting reduces 1-2 degree, will not Stomata is generated in cast(ing) surface, trapped oxide is significantly reduced, and oxide inclusion is at 2 grades or so.Chinese invention patent CN 103614659 also disclose a kind of internal combustion engine austenitic alloy Steel material, the chemical element component contained and its quality hundred Point ratio is：Carbon 0.5-0.7, manganese 6.0-6.5, silicon 1.0-1.2, niobium 0.5-0.7, nickel 3.2-3.5, chromium 15.2-15.5, molybdenum 0.001- 0.003, P≤0.030, S≤0.030, surplus are iron.The invention by using material combinations such as molybdenum, niobiums, rationally setting proportioning and Order is launched in production technology, rationally setting, and the alloy material of formation has high intensity, hardness, wearability, is also had high red Hardness and heat resistance, high-temperature corrosion resistance, oxidation resistant feature are suitable for internal combustion engine；And use part scrap iron as raw material, make conjunction The stable quality of gold is uniform.The invention reduces 1-2 degree by the way that refining agent, degree of porosity is added.Chinese invention patent CN 103614664 also disclose a kind of Diesel Engine's Air Valve martensitic alloy Steel material, the chemical element component and its matter contained Measuring percentage is：Carbon 0.6-0.9, silicon 0.2-0.3, manganese 3.3-3.5, chromium 0.4-0.5, molybdenum 0.03-0.05, vanadium 0.004-0.005, Ti0.06-0.08, Ni2.3-2.5, Sb0.01-0.03, P≤0.030, S≤0.030, surplus are iron.The invention is by using antimony Etc. material combinations, rationally setting proportioning and production technology, rationally setting launch order, the alloy material of formation have high intensity, High rigidity, wearability be good, good toughness, high temperature corrosion, it is anti-oxidant the features such as, be suitable for Diesel Engine's Air Valve, air tightness is high；And Using part scrap iron as raw material, keep the stable quality of alloy uniform；By the way that refining agent is added, degree of porosity reduces 1-2 degree.China Patent of invention CN 103103450 also discloses a kind of material for heat-resistance stainless steel turbine case, is characterized in, including with the following group Part：C：0.3~0.5%, Si：1.5~2.5%, Mn：0.8~1.2%, P≤0.04%, S≤0.04%, Cr：18~27%, Ni：8~10%, Nb：1~2%, surplus Fe；Unit is mass percent.Heat-resistance stainless steel turbine case is used for described in the invention Material meet the operating temperature range of 950 DEG C~1050 DEG C of turbine case, the performance with high-temperature corrosion resistance.Chinese invention patent CN 101906590 also discloses a kind of austenitic heat-resistance steel and its manufacturing method with strengthened nano precipitated phase, and feature exists It is by mass percentage in chemical composition：C：0.002-0.02, Cr：24-26, Ni：22-24, N b+Ta：0.2-0.6, N：0.15-0.35, Mn：≤ 2.00, P：≤ 0.030, S：≤ 0.030, Si：≤ 0.75, surplus be Fe and inevitably it is miscellaneous Matter.Manufacturing method is：By the raw material of constitution element, steel part is made in smelting, hot-working and cold working, then carries out at final heat Reason.Final heat treatment is in two steps：The first step, solution treatment：Steel part is heated to 1170-1250 DEG C, keeps 30-60min, so After be cooled to room temperature；Second step, annealing：Steel part after solution treatment is heated to 800-950 DEG C, keeps 30- 240min, it is then air-cooled to arrive room temperature.The invention steel is evenly distributed with highdensity NbCrN types nano-strengthening phase in intra-die, Size is between 20-60nm, and nano-strengthening phase granule number is distributed at 5-30 on crystal boundary in every micron square area M23C6The percentage that type carbide accounts for grain boundary area is less than 20%, and creep rupture strength significantly improves, resistance to high temperature corrosion performance It is good.
Chinese invention patent CN 101914662 also discloses a kind of HR3C austenitic heat-resistance steels and obtains nano-strengthening phase Heat treatment method, it is characterised in that heat treatment is in two steps：The first step, solution treatment：Steel part is heated to 1170-1250 DEG C, is protected 30-60min is held, is then cooled to room temperature；Second step, annealing：Steel part after solution treatment is heated to 800- 950 DEG C, 30-240min is kept, it is then air-cooled to arrive room temperature.Through the invention heat treatment method treated HR3C austenite heat-resistances Highdensity NbCrN types nano-strengthening phase is distributed in austenite grain inner homogeneous in steel, and size is between 20-60nm, often Nano-strengthening phase granule number is at 5-30 in micron square area, and creep rupture strength significantly improves, resistance to high temperature corrosion performance It is good.Chinese invention patent CN 102321839 also discloses the side that addition rare earth in a kind of T91 and P91 steel improves resistance to high temperature corrosion Method, method are：In the smelting process of T91 and P91 steel, by be added thereto rare earth or and its corresponding oxide, and make Rare earth is dispersed in T91 steel, prepares T91 the and P91 steel containing rare earth.The invention has the technical effect that：1. being added using the invention T91 steel and P91 steel have excellent high temperature resistance steam oxidation performance, the oxidation rate of this kind of material can be significantly decreased. For constant temperature oxidation after 150 hours, the oxidation weight gain of blank sample reaches 8.53mg/cm2, and adds in water vapor at 650 DEG C The oxidation weight gain of sample after rare earth modified only has 0.12mg/cm2.The sample surfaces of added rare earth do not find face crack and Spalling of oxide film.2. rare earth modified T91 and P91 steel pipes are added in the invention, under high-temperature water vapor environment, i.e., in sample surfaces It is formed and is rich in chromium and a small amount of rare-earth oxidation layer.Chinese invention patent C1447863 also discloses a kind of austenitic stainless steel, including 19~23% (weight) chromium, 30~35% (weight) nickel, 1~6% (weight) molybdenum and be less than 0.8% (weight) silicon.The molybdenum of addition Enhance the high temperature corrosion of ferrous alloy of the present invention.Austenitic stainless steel can mainly by 19~23% (weight) chromium, 30 ~35% (weight) nickel, 1~6% (weight) molybdenum, 0~0.1% (weight) carbon, 0~1.5% (weight) manganese, 0~0.05% (weight Amount) phosphorus, 0~0.02% (weight) sulphur, less than 0.8% (weight) silicon, 0.15~0.6% (weight) titanium, 0.15~0.6% (weight Amount) aluminium, 0~0.75% (weight) copper, iron and inevitable impurity are formed.The austenitic stainless steel of the invention is up to extremely There is the Salt corrosion corrosion of enhancing under few 1500 DEG C of wide temperature range.Thus, it is found that the application field of the invention stainless steel Extensively, such as automobile component, more specifically, it is used as automotive exhaust system component and flexible connection pipe and other need to be resistance to The field of corrosion.
But performance of the above-mentioned high-temperature corrosion resistance material under high-temperature corrosion environment, it is also difficult to meet the requirements, it is main to show Intensity drastically declines under high-temperature corrosion environment, and under high-temperature corrosion environment, and with the raising of temperature, corrosion resistance is drastically disliked Change.
Invention content
The present invention often uses high-temperature corrosion resistance material above shortcomings for the prior art, in high-aluminium alloy base steel plinth On, chromium, nitrogen content are improved, and other alloying elements such as magnesium, nickel, zirconium is added, to obtain corrosion-and high-temp-resistant alloy steel material.
The purpose of the present invention can be realized by following measures：
A kind of preparation method of corrosion-and high-temp-resistant alloy steel material, includes the following steps：
1. first being obtained by electro-smelting using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in medium-frequency induction furnace Must contain the steel alloy molten steel of aluminium, chromium, silicon, and by the chemical composition of steel alloy molten steel in stove and its mass fraction control 0.12~ 0.19%C, 12.2~12.7%Al, 27.1~27.9%Cr, 6.9~7.7%Si,<0.4%Mn,<0.03%S,<0.03% P, surplus Fe, are then heated to 1668~1686 DEG C by molten steel temperature, then sequentially add ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon and close Gold, ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for 0.40~0.45% of steel quality score in stove, 1.65 respectively~ 1.82% and 2.13~2.47%, heat preservation is come out of the stove after 4~6 minutes to ladle；
2. after molten steel fully enters ladle, being inserted into multicomponent alloy line, the chemical composition and its mass fraction of multicomponent alloy line For 12.5~13.3%Mg, 2.2~2.6%Ta, 13.5~14.1%Y, 26.5~28.4%Al, 5.9~6.6%V, 7.5~ 8.3%Co, 2.6~3.3%Ca, 8.1~8.7%Ba, 11.0~11.8%Si, 6.1~6.9%Ni, multicomponent alloy line are added Amount accounts for 8.5~9.3% into steel quality score in ladle, multicomponent alloy line it is a diameter ofMolten steel is through taking off After slag, standing, casting mold is poured into when temperature is 1503~1524 DEG C；
3. after molten steel solidifies in casting mold, unpacking and taking out casting, casting is after sand removal and grinding process, extremely with stove heat 330~380 DEG C, 4~6 hours are kept the temperature, comes out of the stove and is air-cooled to room temperature, you can obtains corrosion-and high-temp-resistant alloy steel product.
It is preferred that：
The chemical composition of ferrotianium and mass fraction are as described above：38~42%Ti,<5.0%Al,<2.5%Si,< 0.02%P,<0.20%Cu,<0.10%C,<0.02%S,<2.5%Mn, surplus Fe.
The chemical composition of nitrided ferro-chromium and mass fraction are as described above：60~63%Cr, 5.0~6.5%N, C≤ 0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe.
The chemical composition of zirconium ferrosilicon alloy and mass fraction are as described above：16~22%Zr, 35~48%Si, surplus Fe and inevitable impurity.
The present invention is molten by electric furnace first in medium-frequency induction furnace using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material Refining obtains the steel alloy molten steel containing aluminium, chromium, silicon.It is of low cost using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material, it utilizes Aluminium, chromium and silicon easily form Al at high temperature2O3、Cr2O3And SiO2Film, so as to improve the high-temperature corrosion resistance performance of material.For Ensure that the high temperature corrosion-resisting performance of material, the present invention are needed the chemical composition of steel alloy molten steel in stove and its mass fraction control It makes in 0.12~0.19%C, 12.2~12.7%Al, 27.1~27.9%Cr, 6.9~7.7%Si,<0.4%Mn,<0.03% S,<0.03%P, surplus Fe.On this basis, molten steel in the stove temperature is heated to 1668~1686 DEG C, then sequentially adds titanium Iron, nitrided ferro-chromium and zirconium ferrosilicon alloy.Ferrotianium, nitrided ferro-chromium is added mainly to react using titanium and nitrogen, it is tiny to generate high-melting-point TiN particles, can be used as molten steel solidification during non-spontaneous forming core core, be conducive to refine steel solidified structure, improve material The intensity and toughness of material.In addition the Cr in nitrided ferro-chromium can also further increase the high-temperature corrosion resistance ability of steel.Zirconium ferrosilicon closes The addition of gold can also further increase the high-temperature corrosion resistance ability of steel, and Zr also has good effect to refinement cast steel solidified structure Fruit.Ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for 0.40~0.45% of steel quality score in stove, 1.65 respectively~ 1.82% and 2.13~2.47%, heat preservation is come out of the stove after 4~6 minutes to ladle.After molten steel fully enters ladle, it is inserted into multicomponent alloy Line, the chemical composition and its mass fraction of multicomponent alloy line are 12.5~13.3%Mg, 2.2~2.6%Ta, 13.5~14.1% Y, 26.5~28.4%Al, 5.9~6.6%V, 7.5~8.3%Co, 2.6~3.3%Ca, 8.1~8.7%Ba, 11.0~ 11.8%Si, 6.1~6.9%Ni.The addition of multicomponent alloy line can further increase the high-temperature corrosion resistance ability of steel, to carrying The elevated temperature strength of Gao Gang has very good effect.Multicomponent alloy line addition is accounted for into steel quality score in ladle 8.5~9.3%, multicomponent alloy line it is a diameter ofMolten steel is after skimming, standing, when temperature is 1503~1524 DEG C When pour into casting mold.After molten steel solidifies in casting mold, unpacks and take out casting, casting is after sand removal and grinding process, extremely with stove heat 330~380 DEG C, 4~6 hours are kept the temperature, primarily to eliminating stress, stabilizing tissue.Because this material uses at high temperature, Therefore tapping temperature can be improved to 330~380 DEG C, can improve production efficiency in this way.It comes out of the stove and is air-cooled at 330~380 DEG C Room temperature, you can obtain corrosion-and high-temp-resistant alloy steel product.
Compared with the prior art, the present invention has the following advantages：
1) material at high temperature intensity of the present invention is high, and the tensile strength at 650 DEG C reaches 955~990MPa；
2) material room temperature intensity of the present invention reaches 1520~1585MPa, and impact flexibility reaches 55~63J/cm2；
3) material of the present invention has excellent high-temperature corrosion resistance ability, the constant temperature oxidation 150 in water vapor at 650 DEG C After hour, oxidation weight gain only has 0.07mg/cm2, sample surfaces do not find face crack and spalling of oxide film.And it commonly uses The oxidation weight gain of ZG30Cr24Ni7N reaches 0.26mg/cm2, and sample surfaces discovery has face crack and spalling of oxide film phenomenon.
Specific implementation mode
The present invention is further described with reference to embodiments, but the present invention is not limited to following embodiments.
Embodiment 1：
A kind of corrosion-and high-temp-resistant alloy steel material, it is characterised in that use electro-smelting, following processing step can be passed through To realize：
1. first passing through electricity using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in 500 kilograms of medium-frequency induction furnaces Stove melting obtains the steel alloy molten steel containing aluminium, chromium, silicon, and the chemical composition of steel alloy molten steel in stove and its mass fraction are controlled In 0.13%C, 12.69%Al, 27.11%Cr, 7.65%Si, 0.28%Mn, 0.019%S, 0.024%P, surplus Fe, then Molten steel temperature is heated to 1669 DEG C, then sequentially adding ferrotianium, (chemical composition and mass fraction of ferrotianium be：38.55%Ti, 2.89%Al, 2.10%Si, 0.011%P, 0.08%Cu, 0.09%C, 0.010%S, 1.92%Mn, surplus Fe), chromium nitride (chemical composition and mass fraction of nitrided ferro-chromium be iron：60.54%Cr, 5.13%N, 0.04%C, 1.99%Si, 0.027% P, 0.026%S, surplus Fe) and zirconium ferrosilicon alloy (chemical composition and mass fraction of zirconium ferrosilicon alloy be：16.87%Zr, 47.06%Si, surplus Fe and inevitable impurity), ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for steel in stove respectively 0.40%, 1.82% and the 2.13% of water quality score, heat preservation are come out of the stove after 6 minutes to ladle；
2. after molten steel fully enters ladle, being inserted into multicomponent alloy line, the chemical composition and its mass fraction of multicomponent alloy line For 12.96%Mg, 2.48%Ta, 13.80%Y, 27.17%Al, 6.25%V, 7.91%Co, 2.84%Ca, 8.55%Ba, 11.52%Si, 6.52%Ni, multicomponent alloy line addition account for 8.5% into steel quality score in ladle, multicomponent alloy line It is a diameter ofMolten steel pours into casting mold after skimming, standing when temperature is 1504 DEG C；
3. after molten steel solidifies in casting mold, unpacking and taking out casting, casting is after sand removal and grinding process, extremely with stove heat 330 DEG C, 6 hours are kept the temperature, comes out of the stove and is air-cooled to room temperature, you can obtains corrosion-and high-temp-resistant alloy steel product, mechanical property is shown in Table 1。
Embodiment 2：
A kind of corrosion-and high-temp-resistant alloy steel material, it is characterised in that use electro-smelting, following processing step can be passed through To realize：
1. first passing through electricity using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in 1500 kilograms of medium-frequency induction furnaces Stove melting obtains the steel alloy molten steel containing aluminium, chromium, silicon, and the chemical composition of steel alloy molten steel in stove and its mass fraction are controlled In 0.18%C, 12.29%Al, 27.80%Cr, 6.94%Si, 0.33%Mn, 0.021%S, 0.027%P, surplus Fe, then Molten steel temperature is heated to 1684 DEG C, then sequentially adding ferrotianium, (chemical composition and mass fraction of ferrotianium be：41.37%Ti, 2.88%Al, 1.71%Si, 0.008%P, 0.15%Cu, 0.08%C, 0.014%S, 2.28%Mn, surplus Fe), chromium nitride (chemical composition and mass fraction of nitrided ferro-chromium be iron：62.93%Cr, 6.47%N, 0.08%C, 2.07%Si, 0.019% P, 0.035%S, surplus Fe) and zirconium ferrosilicon alloy (chemical composition and mass fraction of zirconium ferrosilicon alloy be：21.64%Zr, 36.97%Si, surplus Fe and inevitable impurity), ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for steel in stove respectively 0.45%, 1.65% and the 2.47% of water quality score, heat preservation are come out of the stove after 4 minutes to ladle；
2. after molten steel fully enters ladle, being inserted into multicomponent alloy line, the chemical composition and its mass fraction of multicomponent alloy line For 12.52%Mg, 2.57%Ta, 13.50%Y, 28.33%Al, 5.92%V, 8.24%Co, 2.61%Ca, 8.68%Ba, 11.04%Si, 6.59%Ni, multicomponent alloy line addition account for 9.3% into steel quality score in ladle, multicomponent alloy line It is a diameter ofMolten steel pours into casting mold after skimming, standing when temperature is 1522 DEG C；
3. after molten steel solidifies in casting mold, unpacking and taking out casting, casting is after sand removal and grinding process, extremely with stove heat 380 DEG C, 4 hours are kept the temperature, comes out of the stove and is air-cooled to room temperature, you can obtains corrosion-and high-temp-resistant alloy steel product, mechanical property is shown in Table 1。
Embodiment 3：
A kind of corrosion-and high-temp-resistant alloy steel material, it is characterised in that use electro-smelting, following processing step can be passed through To realize：
1. first passing through electricity using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in 3000 kilograms of medium-frequency induction furnaces Stove melting obtains the steel alloy molten steel containing aluminium, chromium, silicon, and the chemical composition of steel alloy molten steel in stove and its mass fraction are controlled In 0.16%C, 12.39%Al, 27.48%Cr, 7.31%Si, 0.26%Mn, 0.028%S, 0.021%P, surplus Fe, then Molten steel temperature is heated to 1675 DEG C, then sequentially adding ferrotianium, (chemical composition and mass fraction of ferrotianium be：39.80%Ti, 2.07%Al, 1.28%Si, 0.013%P, 0.11%Cu, 0.06%C, 0.015%S, 2.04%Mn, surplus Fe), chromium nitride (chemical composition and mass fraction of nitrided ferro-chromium be iron：61.81%Cr, 5.84%N, 0.08%C, 2.13%Si, 0.026% P, 0.033%S, surplus Fe) and zirconium ferrosilicon alloy (chemical composition and mass fraction of zirconium ferrosilicon alloy be：19.27%Zr, 41.06%Si, surplus Fe and inevitable impurity), ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for steel in stove respectively 0.42%, 1.70% and the 2.25% of water quality score, heat preservation are come out of the stove after five minutes to ladle；
2. after molten steel fully enters ladle, being inserted into multicomponent alloy line, the chemical composition and its mass fraction of multicomponent alloy line For 13.27%Mg, 2.21%Ta, 14.01%Y, 26.53%Al, 6.46%V, 7.51%Co, 3.25%Ca, 8.12%Ba, 11.77%Si, 6.87%Ni, multicomponent alloy line addition account for 8.9% into steel quality score in ladle, multicomponent alloy line It is a diameter ofMolten steel pours into casting mold after skimming, standing when temperature is 1517 DEG C；
3. after molten steel solidifies in casting mold, unpacking and taking out casting, casting is after sand removal and grinding process, extremely with stove heat 350 DEG C, 5 hours are kept the temperature, comes out of the stove and is air-cooled to room temperature, you can obtains corrosion-and high-temp-resistant alloy steel product, mechanical property is shown in Table 1。
1 corrosion-and high-temp-resistant alloy steel mechanical property of table
Material at high temperature intensity of the present invention is high, and the tensile strength at 650 DEG C reaches 955~990MPa, material room temperature of the present invention Intensity reaches 1520~1585MPa, and room temperature impact toughness reaches 55~63J/cm2, comprehensive mechanical property is excellent.The present invention has Excellent high-temperature corrosion resistance ability, after 150 hours, oxidation weight gain only has constant temperature oxidation in water vapor at 650 DEG C 0.07mg/cm2, sample surfaces do not find face crack and spalling of oxide film, and the oxidation weight gain of common ZG30Cr24Ni7N reaches 0.26mg/cm2, and sample surfaces discovery has face crack and spalling of oxide film phenomenon, the high-temperature corrosion resistance energy of material of the present invention Power is substantially better than ZG30Cr24Ni7N, and production cost reduces by 15% or so, and promoting and applying achievement of the present invention has good warp Ji and social benefit.

Claims (2)

1. a kind of preparation method of corrosion-and high-temp-resistant alloy steel material, which is characterized in that include the following steps：
1. first being contained by electro-smelting using metallic aluminium, ferrochrome, ferrosilicon and steel scrap as primary raw material in medium-frequency induction furnace The steel alloy molten steel of aluminium, chromium, silicon, and by the chemical composition of steel alloy molten steel in stove and its mass fraction control 0.12~ 0.19%C, 12.2~12.7%Al, 27.1~27.9%Cr, 6.9~7.7%Si,<0.4%Mn,<0.03%S,<0.03% P, surplus Fe, are then heated to 1668~1686 DEG C by molten steel temperature, then sequentially add ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon and close Gold, ferrotianium, nitrided ferro-chromium and zirconium ferrosilicon alloy addition account for 0.40~0.45% of steel quality score in stove, 1.65 respectively~ 1.82% and 2.13~2.47%, heat preservation is come out of the stove after 4~6 minutes to ladle；
2. after molten steel fully enters ladle, being inserted into multicomponent alloy line, the chemical composition and its mass fraction of multicomponent alloy line are 12.5~13.3%Mg, 2.2~2.6%Ta, 13.5~14.1%Y, 26.5~28.4%Al, 5.9~6.6%V, 7.5~ 8.3%Co, 2.6~3.3%Ca, 8.1~8.7%Ba, 11.0~11.8%Si, 6.1~6.9%Ni, multicomponent alloy line are added Amount accounts for 8.5~9.3% into steel quality score in ladle, multicomponent alloy line it is a diameter ofMolten steel is through taking off After slag, standing, casting mold is poured into when temperature is 1503~1524 DEG C；
After 3. molten steel solidifies in casting mold, unpack take out casting, casting after sand removal and grinding process, with stove heat to 330~ 380 DEG C, 4~6 hours are kept the temperature, comes out of the stove and is air-cooled to room temperature, you can obtains corrosion-and high-temp-resistant alloy steel product；
The chemical composition and mass fraction of ferrotianium be：38~42%Ti,<5.0%Al,<2.5%Si,<0.02%P,<0.20% Cu,<0.10%C,<0.02%S,<2.5%Mn, surplus Fe；
The chemical composition and mass fraction of nitrided ferro-chromium be：60~63%Cr, 5.0~6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe；
The chemical composition and mass fraction of zirconium ferrosilicon alloy be：16~22%Zr, 35~48%Si, surplus Fe and inevitably Impurity.
2. a kind of corrosion-and high-temp-resistant alloy steel material, which is characterized in that be prepared according to the method for claim 1.
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