CN109351957A - Laser melting coating iron(-)base powder and preparation method thereof - Google Patents
Laser melting coating iron(-)base powder and preparation method thereof Download PDFInfo
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- CN109351957A CN109351957A CN201711418256.4A CN201711418256A CN109351957A CN 109351957 A CN109351957 A CN 109351957A CN 201711418256 A CN201711418256 A CN 201711418256A CN 109351957 A CN109351957 A CN 109351957A
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- base powder
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000000843 powder Substances 0.000 title claims abstract description 66
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 37
- 238000002844 melting Methods 0.000 title claims abstract description 37
- 230000008018 melting Effects 0.000 title claims abstract description 37
- 239000011248 coating agent Substances 0.000 title claims abstract description 26
- 238000000576 coating method Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 229910052796 boron Inorganic materials 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000011261 inert gas Substances 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 28
- 239000000956 alloy Substances 0.000 claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 229910000734 martensite Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000006052 feed supplement Substances 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000005253 cladding Methods 0.000 abstract description 49
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 40
- 239000000463 material Substances 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000011651 chromium Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 238000000889 atomisation Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000012300 argon atmosphere Substances 0.000 description 3
- 239000011195 cermet Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004372 laser cladding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000012387 aerosolization Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
Abstract
The invention discloses a kind of laser melting coating iron(-)base powders, including following mass percent component: 0.1~0.3%C, 0.3~0.6%B, 1.0~3.0%Si, 2~4%Ti, 7~11%Ni, 16~20%Cr, 1.0~3.0%Mo, Fe are surplus.Above-mentioned iron(-)base powder is also disclosed using intermediate frequency furnace melting-inert gas atomizer preparation method.Iron(-)base powder of the invention under without preheating and rear heat condition, can cladding obtain the cladding layer of the high thickness of large area, cladding layer do not crack；Hardness is high after cladding, and wear-resisting property Cr element good and more than needed forms passivating film and is allowed to have both good corrosion resistance；Iron(-)base powder of the invention is low in cost, application easy to spread.
Description
Technical field
The present invention relates to a kind of alloy plating materials, more particularly, to a kind of laser melting coating iron(-)base powder, simultaneously
It is related to preparation method.
Background technique
There are many key components and parts because being chronically at severe working environment in the industries such as mine, metallurgy, chemical industry, the energy
Under, because the reasons failure such as wearing, corroding, failure mode mostly occurs in material surface.Laser melting coating is one emerging and great
The technology of development potentiality, it is under the irradiation of high energy density laser beam, in one layer very thin melt of substrate material surface formation
Layer, and by the alloy powder of preset or method of synchronization addition special component, so that them is equably spread over zero with molten condition
Component surface layer simultaneously reaches predetermined thickness.Cladding layer and micro- molten basis material form good metallurgical bonding, and each other only
There is the dilution of very little.Cladding layer is formed entirely different with basis material in subsequent rapid solidification in piece surface
, cladding material layer with predetermined property, to change the surface property of substrate completely.With common plating, thermal jet
The technologies such as painting, built-up welding are compared, and laser melting coating is because of bond strength height, and material consumption is few, and heat affected area is small, and coating dilution rate is low, cold
But speed is fast, dense structure, and cladding layer thickness can control range greatly and process is easy to automate, can significantly improve
Matrix surface is wear-resisting, anti-corrosion, the heat-resisting and characteristics such as anti-oxidant and be used widely.Cladding layer forming quality determines that laser is molten
The reliability of coating technique, influencing one importance of laser cladding layer forming quality and comprehensive performance is laser cladding material, is melted
Cover the military service performance that material directly determines cladding layer.The state of laser cladding material generally has powdered, Filamentous and paste, answers
With being most widely dusty material, it is broadly divided into the composite powder of metal powder, ceramic powders and the two compounding, and metal
Powder is due to having good adaptability therefore most study to a variety of substrates such as carbon steel, stainless steel, cast steel.In metal powder
Self-fluxing alloyed powder for, most it is representative be Ni-based, cobalt-based, iron-based powder: although iron(-)base powder price compared with
It is low, but its properties is all not so good as Ni-based and Co-based powder；Co-based alloy powder high temperature resistant, wear-resisting and corrosion resistance are most
It is good, but price is higher；Preferably still high temperature resistance is poor for nickel base powder heat resistance, corrosion resistance, and price is relatively mild.
Summary of the invention
Currently, laser melting coating mainly continues to use hot spray powder or the thermal spraying by proper composition adjustment with metal powder
Powder.However, hot spray powder easily crack when laser melting coating, it is especially bright in cladding high rigidity hot spray powder
It is aobvious；In addition, laser energy density is big, carbon scaling loss is serious in conventional thermal spray powder, causes the wearability of cladding layer substantially
Degree reduces.In order to improve the wearability of cladding layer, the cermet particles of high rigidity are added (such as usually in hot spray powder
WC, TiC etc.)；Although the addition of cermet particles can be improved the wearability of cladding layer, cermet particles and cladding
The hot physical property of alloy base material differs greatly, and more promotes the generation of crackle.
Based on laser melting and coating technique feature --- the temperature gradient of cladding layer big (cladding layer skin temperature height, substrate temperature
It is low), as cladding layer temperature reduces in cladding process, cladding layer shrinkage is much larger than matrix, causes cladding layer to be in drawing and answers
Power state, is easy to produce crackle.It therefore, can be bright by the preheating to matrix and to heat after cladding layer in production application
The aobvious temperature difference for reducing cladding layer and matrix, reduces the stress of cladding layer, achievees the purpose that eliminate crackle.But this method is simultaneously
Cannot solve the problems, such as cracking from basic, but also there are detrimental effects: 1) microstructure of surface cladding layer is roughened, and crystal grain increases, hardness
It reduces；2) combination interface of matrix and cladding layer is also easy to produce stress；2) need heat and heat-preserving equipment, increase production process and
Cost.
In order to solve the above technical problems, that the present invention provides a kind of wear-resisting properties is good, and need not move through at preheating and rear heat
The inexpensive iron(-)base powder of reason.
The technical solution of the present invention is to provide a kind of laser melting coating iron(-)base powders, including following mass percent group
Point: 0.1~0.3%C, 0.3~0.6%B, 1.0~3.0%Si, 2~4%Ti, 7~11%Ni, 16~20%Cr, 1.0~
3.0%Mo, surplus are Fe and inevitable trace impurity.
The overlay alloy structure obtained after the iron(-)base powder cladding is low-carbon martensite, retained austenite, more
Dissipate the mixture of carbide, the wearability of low-carbon martensite and diffusion carbide principal security overlay, austenite principal security
The good toughness plasticity of overlay.
The present invention also provides the preparation methods of above-mentioned iron(-)base powder, using intermediate frequency furnace melting-inert gas mist
Prepared by the method for change, include the following steps:
S1. raw material are weighed according to said ratio, be packed into medium frequency induction melting furnace；
S2. vacuum heats up, and is then charged with inert gas and carries out melting to alloy；
S3. the alloy molten solution after step S2 melting is come out of the stove and is poured slowly into intermediate bottom pour ladle, and under inert gas medium
Atomization, obtains alloy powder.
Using carbon block, metallic silicon, ferro-boron as feed supplement in the step S1, sequentially added after the fusing of other raw material；Add
Temperature when entering feed supplement in intermediate frequency furnace is controlled at 1500~1550 DEG C；
Alloy molten solution tapping temperature maintains 1700~1750 DEG C in the step S3.
The atomizing pressure of inert gas medium is 2~5MPa in the step S3.
Intermediate bottom pour ladle takes Insulation in the step S3, ensure that the degree of superheat of alloy molten solution during aerosolization,
It is not easy blocking package, while also improving the sphericity and recovery rate of alloy powder, wherein alloy powder sphericity height is conducive to improve
The tissue homogeneous degree and compactness of alloy powder cladding layer, keep cladding layer not easy to crack, and wear resistance and corrosion resistance is good
The advantages of the present invention:
1. iron(-)base powder of the invention is under without preheating and rear heat condition, can cladding obtain large area high thickness
Cladding layer, cladding layer do not crack；
2. the hardness after iron(-)base powder cladding of the invention is high, wear-resisting property is good and because Cr element more than needed forms passivation
Film is allowed to have both good corrosion resistance；
3. iron(-)base powder of the invention is low in cost, application easy to spread.
Specific embodiment
The invention will be further described With reference to embodiment.
The present invention is based on the operational characteristiies of laser melting and coating technique, emphatically from the ingredient of ferrous alloy cladding layer material, tissue
Structure is set out, and the tendentiousness of cladding layer cracking is fundamentally reduced, and guarantees the high rigidity of cladding layer, is taken into account corrosion resistance, is
This as follows designs iron(-)base powder at being grouped as:
Since temperature gradient of the cladding layer from matrix to surface of laser melting coating is big, the cooling of cladding layer also belongs to fast quickly cooling
But, so the tissue that cladding layer is usually formed all is dendritic tissue, component segregation is serious, and tissue and thermal stress are big, so
Tearing tendency is big, therefore iron(-)base powder of the present invention optimizes alloying component, reduces the solid-liquid two-phase region of alloy to reduce
Dendritic segregation, making cladding layer tissue after cooling is tiny equiaxed grain structure, is especially added to Ti element, further refinement is brilliant
, the crystal grain for the shaft-like such as reduction dendritic segregation promotion matrix is formed；And equiaxed grain structure matrix has good toughness plasticity；
The boron and silicon of lower content are used in alloying component, to reduce the opposite of low melting point borosilicate compound in alloy
Content, since the fusing point of borosilicate compound all compares lower, thermal physical property parameter differs larger with matrix, in cladding layer
During rapid cooling, borosilicate compound has little time to float to the surface of cladding layer, thus can be in cladding layer after the cooling period
Portion generates biggish stress, therefore reduction boron and silicone content can be improved the intensity of each ingredient thermal physical property parameter in matrix,
Reducing the issuable stress reduction cracking of matrix in cooling procedure may；
Carbon content is reduced, guarantees the toughness of alloy；
The chromium for adding more amount, after chromium and other compositions form alloy structure, chromium more than needed is capable of forming passivating film,
The overlay for forming iron(-)base powder has good corrosion resistance.
The iron(-)base powder totally obtained is set to form low-carbon martensite, residual after deposition by mentioned component composition design
Remaining austenite, diffusion carbide mixing alloy structure, different with high carbon martensite in the prior art, low-carbon horse in the present invention
Family name's body and diffusion carbide can better ensure that wearability, and austenite can guarantee good toughness plasticity；Furthermore solid solution is strong
The hardness of the precipitation strength collaborative guarantee overlay of change and alloy cpd.
Embodiment 1
Weigh raw material according to following mass percent: 0.2%C, 0.5%B, 1.2%Si, 2.0%Ti, 8.0%Ni,
18.0%Cr, 2.0%Mo, Fe are surplus；
The raw material weighed up are packed into intermediate frequency furnace, wherein carbon block, ferro-boron, metallic silicon are placed on material-feeding port；Melting
Room is evacuated to 5Pa, opens intermediate frequency furnace power supply and is slowly increased power heating；Start to melt to furnace charge, close vacuum pump group,
It is filled with the argon gas close to local atmospheric pressure；After being completely melt, intermediate frequency power supply power is reduced, is down to 1500~1520 DEG C to furnace temperature,
Carbon block, metallic silicon and ferro-boron successively is added from from smelting furnace material-feeding port；The power for increasing medium frequency induction melting furnace power supply, 1700
Alloy molten solution is poured slowly into the intermediate bottom pour ladle of atomization and is atomized by~1720 DEG C, and atomizing medium is nitrogen, atomizing pressure is
3.5MPa；Atomization is completed to be cooled to room temperature to powder, is sieved, is obtained not in the ultrasonic activation sieve of argon atmosphere protection
The finished powder of same specification section；Finished powder is vacuum-packed.
Embodiment 2
Weigh raw material according to following mass percent: 0.1%C, 0.6%B, 2.0%Si, 3.0%Ti, 7.0%Ni,
20.0%Cr, 3.0%Mo, Fe are surplus；
The raw material weighed up are packed into intermediate frequency furnace, wherein carbon block, ferro-boron, metallic silicon are placed on material-feeding port；Melting
Room is evacuated to 5Pa, opens intermediate frequency furnace power supply and slowly heats up；Start to melt to furnace charge, closes vacuum pump group, be filled with close
The argon gas of local atmospheric pressure；After being completely melt, intermediate frequency power supply power is reduced, is down to 1520~1550 DEG C to furnace temperature, successively from molten
Carbon block, metallic silicon and ferro-boron is added in furnace material-feeding port；The power for increasing medium frequency induction melting furnace power supply, will at 1720~1750 DEG C
Alloy molten solution is poured slowly into the intermediate bottom pour ladle of atomization and is atomized, and atomizing medium is nitrogen, atomizing pressure 4MPa；Atomization is completed
It is cooled to room temperature to powder, is sieved in the ultrasonic activation sieve of argon atmosphere protection, obtain the finished product of different size section
Powder；Finished powder is vacuum-packed.
Embodiment 3
Weigh raw material according to following mass percent: 0.3%C, 0.3%B, 3.0%Si, 4.0%Ti, 11.0%Ni,
16.0%Cr, 1.0%Mo, Fe are surplus；
The raw material weighed up are packed into intermediate frequency furnace, wherein carbon block, ferro-boron, metallic silicon are placed on material-feeding port；Melting
Room is evacuated to 5Pa, opens intermediate frequency furnace power supply and is slowly increased power heating；Start to melt to furnace charge, close vacuum pump group,
It is filled with the argon gas close to local atmospheric pressure；After being completely melt, intermediate frequency power supply power is reduced, is down to 1520~1550 DEG C to furnace temperature,
Carbon block, metallic silicon and ferro-boron successively is added from from smelting furnace material-feeding port；The power for increasing medium frequency induction melting furnace power supply, 1720
Alloy molten solution is poured slowly into the intermediate bottom pour ladle of atomization and is atomized by~1750 DEG C, and atomizing medium is nitrogen, atomizing pressure is
3MPa；Atomization is completed to be cooled to room temperature to powder, is sieved in the ultrasonic activation sieve of argon atmosphere protection, obtains difference
The finished powder of specification section；Finished powder is vacuum-packed.
Product of the present invention is tested for the property:
(1) select 53~125um specification iron(-)base powder, on H13 steel substrate, set laser power as 2000W,
Laser beam flying rate is 6mm/s, powder sending quantity 70g/min, obtains cladding layer after laser melting coating respectively.Cladding layer does not crack
Phenomenon, the hardness of cladding layer are HRC59.
(2) select 53~125um specification iron(-)base powder, on No. 45 steel substrates, set laser power as
1500W, laser beam flying rate be 5mm/s, powder sending quantity 60g/min, obtains cladding layer after laser melting coating respectively.It is melted after cladding
The surfacing of coating, without crackle, hardness is HRC60.
Using MM-200 type abrasion tester to the sample of cladding 53~125um specification iron(-)base powder in (1) (2) into
Row wearability test, specimen size are 7 × 7 × 25mm, and friction duty is dry grinding sliding friction, are loaded as 5kg, revolving speed is
200r/min, experimental period 2h.Using of poor quality (being adopted before measurement of electronic analytical balance measurement sample abrasion front and back quality
With ultrasonic washing instrument washed samples), sample 1.2 ± 0.1mg of weightlessness of test result (1), the sample weightlessness 1.5 of (2) ±
0.1mg。
The present embodiments relate to the material arrived, reagent and experimental facilities, are to meet alloy plating unless otherwise instructed
The commercial product of Material Field.
The above is merely a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise of not departing from core of the invention technology, improvements and modifications can also be made, these improvements and modifications are also answered
Belong to scope of patent protection of the invention.With any change in the comparable meaning and scope of claims of the present invention, all
It is considered as being included within the scope of the claims.
Claims (9)
1. laser melting coating iron(-)base powder, which is characterized in that including following mass percent component: 0.1~0.3%C,
0.3~0.6%B, 1.0~3.0%Si, 2~4%Ti, 7~11%Ni, 16~20%Cr, 1.0~3.0%Mo, surplus Fe
And inevitable trace impurity.
2. laser melting coating iron(-)base powder according to claim 1, which is characterized in that the iron(-)base powder is molten
The overlay alloy structure obtained after covering is the mixture of low-carbon martensite, retained austenite, diffusion carbide.
3. the preparation method of the described in any item laser melting coating iron(-)base powders of claims 1 or 2, which is characterized in that adopt
It is made with after medium-frequency induction furnace melting through inert gas atomizer.
4. the preparation method of laser melting coating iron(-)base powder according to claim 3, which is characterized in that including as follows
Step:
S1. raw material are weighed according to said ratio, be packed into medium-frequency induction furnace smelting furnace；
S2. vacuum heats up, and is then charged with inert gas and carries out melting to alloy；
S3. the alloy molten solution after step S2 melting is come out of the stove and pours into intermediate bottom pour ladle, and be atomized under inert gas medium, obtained
Alloy powder.
5. the preparation method of laser melting coating iron(-)base powder according to claim 4, which is characterized in that the step
Carbon block, metallic silicon, ferro-boron in the raw material of S1 sequentially adds Medium frequency induction electricity as feed supplement after the fusing of other raw material
Furnace melting.
6. the preparation method of laser melting coating iron(-)base powder according to claim 4, which is characterized in that feed supplement is added
When medium-frequency induction furnace in temperature control at 1500~1550 DEG C.
7. the preparation method of laser melting coating iron(-)base powder according to claim 4, which is characterized in that the step
Alloy molten solution tapping temperature maintains 1700~1750 DEG C in S3.
8. the preparation method of laser melting coating iron(-)base powder according to claim 4, which is characterized in that the step
The atomizing pressure of inert gas medium is 2~5MPa in S3.
9. the preparation method of laser melting coating iron(-)base powder according to claim 4, which is characterized in that the step
Intermediate bottom pour ladle takes Insulation in S3.
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| CN110484911A (en) * | 2019-08-19 | 2019-11-22 | 山东能源重装集团大族再制造有限公司 | A kind of alloy powder and preparation method thereof for laser melting coating |
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| CN110965061A (en) * | 2020-01-02 | 2020-04-07 | 北京机科国创轻量化科学研究院有限公司 | Wear-resistant and corrosion-resistant iron-based alloy powder for laser cladding and laser cladding layer thereof |
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| CN111809177A (en) * | 2020-06-23 | 2020-10-23 | 宁波中物力拓超微材料有限公司 | Laser cladding alloy powder for die repair and preparation method thereof |
| CN113136532A (en) * | 2021-04-26 | 2021-07-20 | 矿冶科技集团有限公司 | Iron-based alloy powder for laser cladding and preparation method thereof |
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| CN110846653A (en) * | 2019-10-24 | 2020-02-28 | 上海岳乾激光科技有限公司 | Method for strengthening wear-resistant layer on surface of steel conveying roller |
| CN110965061A (en) * | 2020-01-02 | 2020-04-07 | 北京机科国创轻量化科学研究院有限公司 | Wear-resistant and corrosion-resistant iron-based alloy powder for laser cladding and laser cladding layer thereof |
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| CN111809177A (en) * | 2020-06-23 | 2020-10-23 | 宁波中物力拓超微材料有限公司 | Laser cladding alloy powder for die repair and preparation method thereof |
| CN111809177B (en) * | 2020-06-23 | 2022-10-14 | 宁波中物力拓超微材料有限公司 | Laser cladding alloy powder for repairing die and preparation method thereof |
| CN113136532A (en) * | 2021-04-26 | 2021-07-20 | 矿冶科技集团有限公司 | Iron-based alloy powder for laser cladding and preparation method thereof |
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