CN104308389B - Fabricated in situ WC-VC particles enhance the alloy powder block and production method of coating - Google Patents
Fabricated in situ WC-VC particles enhance the alloy powder block and production method of coating Download PDFInfo
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- CN104308389B CN104308389B CN201410442578.2A CN201410442578A CN104308389B CN 104308389 B CN104308389 B CN 104308389B CN 201410442578 A CN201410442578 A CN 201410442578A CN 104308389 B CN104308389 B CN 104308389B
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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Abstract
The invention discloses alloy powder blocks and production method that fabricated in situ WC-VC particles enhance coating, prepare powdery starting material according to mass fraction:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, 10-12 parts of vanadium iron, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder;Powdery starting material is put into batch mixer and is adequately mixed, mixed-powder is made;Resulting mixture is adequately stirred after mixed-powder is poured into Arabic gum aqueous solution;Mixture is placed in air dry oven and is heated to 120-160 DEG C, keeps the temperature 2h;It cools to room temperature with the furnace, the alloy powder block of different size series is pressed into the mold of different model.The beneficial effects of the invention are as follows the bond strength highers of WC-VC particles and matrix that generation is reacted under the conditions of electric arc reaction, and distribution of particles is more uniform, case hardness higher, and clad surface is high-quality;And it is flexible and convenient to use.
Description
Technical field
The invention belongs to metal surface melting and coating technique fields, are related to the alloyed powder of fabricated in situ WC-VC particles enhancing coating
Block and production method.
Background technology
WC particle has due to its excellent mechanical property, high rigidity, good ductility and Young's modulus with iron family element
The characteristics of good wetability, receives people and widely pays close attention to.V is also a kind of carbide, can with graphite
VC particle phases are generated, the hardness of VC itself is up to HV2094, and post-curing effect is apparent, can be very good to play solid solution to matrix
The effect of reinforcing.Industrially using WC or VC as matrix, Fe, Co or Ni metal are made as binder phase material using powder metallurgy
Hard alloy have excellent wear-resisting property, be widely used.Currently, most of metal based coating is all to use
Single hard phase enhances coating, and majority be by prepare hard alloy, prepare the processes such as flux-cored wire obtain WC,
The particulate reinforced metal-based materials of VC, and it is used for wear member, production process is complicated, and equipment investment is big, results in the system of material
It is standby of high cost, to constrain application of this kind of material in wear-resistant material parts.
Using process for modifying surface, by the method for prealloy powder agglomates, preparing WC-VC two-phases enhances steel-based composite wood
Material, has broad application prospects.Moreover, in the past since WC, VC particle are directly to add, surface vulnerable to pollution reduces increasing
The bond strength of strong phase and matrix;The dissolution transitions of hard particles are also easy tod produce under the action of high temperature heat source so that ceramics
Phase particle is easily separated from matrix under the effect of external force, reduces the wear-resisting property of material;And in-situ synthesis is used, reinforced phase
Particle size is relatively fine, and clean surface is pollution-free, and coating shows good metallurgical binding with matrix, it is possibility to have effect
The problem of avoiding with basal body interface non-wetting.Meet production rule so developing a kind of new product or improving prior art
Modelling, cost-effective, simple operation, performance stability, it has also become the task of top priority.
Invention content
The purpose of the present invention is to provide the alloy powder block production methods that fabricated in situ WC-VC particles enhance coating, solve
That there are preparation process is complicated for existing method, and equipment is complicated, with substrate combinating strength is relatively low, clad surface is of poor quality and
The problem of being difficult to control.
It is a further object to provide the alloy powder blocks that fabricated in situ WC-VC particles enhance coating.
The technical solution adopted by the present invention is that the mass fraction of each constituent of alloy powder block is:55-60 parts of ferrotungsten, mud
6-7.5 parts of shape graphite, 10-12 parts of vanadium iron, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder.
The production method that fabricated in situ WC-VC particles enhance the alloy powder block of coating, follows the steps below:
Step 1:Prepare powdery starting material according to mass fraction:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, vanadium iron
10-12 parts, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder;
Step 2:Powdery starting material is put into batch mixer and is adequately mixed, mixed-powder is made;
Step 3:Resulting mixture is adequately stirred after mixed-powder is poured into Arabic gum aqueous solution;
Step 4:Mixture is placed in air dry oven and is heated to 120-160 DEG C, keeps the temperature 2h;
Step 5:It cools to room temperature with the furnace, the alloy powder block of different size series is pressed into the mold of different model.
Further, the Arabic gum concentration of aqueous solution is 2-5%, the aqueous solution of Arabic gum in every 100g mixed-powders
Addition is 10-25ml.
Further, alloy powder block vacuum packing machine encapsulates spare, is used in use, taking out alloy powder block after sealing off
TIG Welding Machine built-up welding.
The beneficial effects of the invention are as follows the bond strengths of the WC-VC particles that generation is reacted under the conditions of electric arc reaction and matrix more
Height, distribution of particles is more uniform, case hardness higher, and clad surface is high-quality;And it is flexible and convenient to use.
Specific implementation mode
The present invention is described in detail With reference to embodiment.
Using the alloy powder block suppressed after premix as carrier, being prepared using argon tungsten-arc welding fabricated in situ has WC-VC particles
The abrasion resistant coating of enhancing.Primary raw material is ferrotungsten powder, pureed graphite, vanadium iron powder and a small amount of ferrosilicon, is added after being pre-mixed uniformly
Enter Arabic gum aqueous solution to be stirred for, certain thickness cuboid alloy powder block is pressed into after drying.
Each composition composition quality number of alloy powder block is:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, vanadium iron 10-12
Part, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder.
A kind of alloy powder block production method step for fabricated in situ WC-VC particles enhancing iron-based composite coating of the present invention
It is as follows:
Step 1:Prepare powdery starting material according to mass fraction:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, vanadium iron
10-12 parts, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder;
Step 2:Powdery starting material is put into batch mixer and is adequately mixed, mixed-powder is made;
Step 3:It is adequately stirred after mixed-powder to be poured into the Arabic gum aqueous solution of a concentration of 2-5%, mixing is made
Object;The aqueous solution addition of Arabic gum is 10-25ml in per 100g mixed-powders.
Step 4:Mixture is placed in air dry oven and is heated to 120-160 DEG C, keeps the temperature 2h;
Step 5:Mixture cools to room temperature with the furnace, and the alloyed powder of different size series is pressed into the mold of different model
Block.
Wherein, compacting different size series alloy powder block can be used coat briquetting technique cuboid is made, thickness is
2-3mm.Alloy powder block after making vacuum packing machine is encapsulated spare.In use, taking out alloy powder block after sealing off uses tungsten
Electrode argon arc welding machine built-up welding.
Alloy powder block of the present invention can react under the conditions of electric arc reaction generates WC-VC particles enhancing iron-based cladding in situ
Layer, and the problem of influence the bond strength of WC-VC particles and matrix there is no the dissolving of WC and VC and surface contamination, effectively
Improve the wear-resisting property of cladding layer.For the present invention due to being block elements, production method is simple, flexible and convenient to use, with normal
Rule welding method welding can obtain WC-VC iron-based composite coatings under electric arc, therefore production cost is low, and WC-VC particles are anti-
It should synthesize, be cleaned with matrix combination interface, also avoid the dissolving of particle, the performance of cladding layer has obtained good raising.
The present invention has following significant difference compared with prior art:
1. compared with the hard alloy that powder metallurgy obtains, since matrix is ferrous alloy so that cladding layer has high resistance to
Also has good plasticity while mill property.And wear member surface can be overlayed on Integral melting, reach and extends part use
The effect in service life.It moreover, application field is more extensive, not only can be used for the whole production of part, but also can be used for repairing for part
It is multiple.
2. compared with thermal spraying, the bond strength of WC-VC particles and matrix is more preferable, and distribution of particles is more uniform, surface
The porosity of hardness higher, material is low, the utilization rate higher of material.
3. compared with existing cladding method, since WC-VC particles are that reaction in-situ generates, the sinking to the bottom of carbides-free particle,
Dissolving, the unclean problem in surface, therefore wear-resisting property are more stablized.
4. low using alloy powder block manufacturing cost with current build-up welding repair method ratio, production efficiency is high, can be used for automatic
Change large batch of production, size, the specification of respective series can be made according to the different situations for repairing object in product, easy to use,
Fast.
Specific embodiment is set forth below, and the present invention will be described:
Embodiment 1:Each composition composition quality number of alloy powder block is:55 parts of ferrotungsten, 6.5 parts of pureed graphite, vanadium iron 10
Part, 5 parts of ferrosilicon, 23.5 parts of reduced iron powder.The alloy powder block for using the technique of coating briquetting that thickness is made as 2mm, uses tungsten electrode
Argon arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Welding examination
Plate is ordinary low-carbon steel, two layers of built-up welding, and overlay cladding is without visually seeing crackle.It is tried using MLS-23 type damp sand rubber type fretting wears
It tests machine and carries out abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is 1.5kg quartz sands
Under conditions of 1kg water, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent is that 0.0118g is hard with HR-150 Rockwells
Degree measurement examination hardness takes 5 points of average value as test result using multidigit multi-point test method.Being averaged for deposited metals is hard
Degree is 65.8HRC.
Embodiment 2:Each composition composition quality number of alloy powder block is:58.5 parts of ferrotungsten, 6.8 parts of pureed graphite, vanadium iron
10 parts, 5 parts of ferrosilicon, 20 parts of reduced iron powder.The mixing powder agglomates for using the technique of coating briquetting that thickness is made as 2mm, uses tungsten electrode
Argon arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Welding examination
Plate is ordinary low-carbon steel, and two layers of built-up welding, built-up welding formable layer is good, flawless.Using MLS-23 type damp sand rubber type fretting wears
Testing machine carries out abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is 1.5kg quartz
Under conditions of sand matches 1kg water, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent 0.0115g.With the Lip rivers HR-150
Family name's hardometer test hardness takes 5 points of average value as test result using multidigit multi-point test method.Deposited metals are put down
Equal hardness 65.4HRC.
Embodiment 3:Each composition composition quality number of alloy powder block is:58.5 parts of ferrotungsten, 7.0 parts of pureed graphite, vanadium iron
11.8 parts, 5 parts of ferrosilicon, 25 parts of reduced iron powder.The mixing powder agglomates for using the technique of coating briquetting that thickness is made as 2mm, uses tungsten
Pole argon arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Welding
Test plate (panel) is ordinary low-carbon steel, two layers of built-up welding, without apparent weld defect.Using MLS-23 type damp sand rubber type friction wear testing machines
Carry out abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is that 1.5kg quartz sands are matched
Under conditions of 1kg water, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent 0.0111g.It is hard with HR-150 Rockwells
Degree measurement examination hardness takes 5 points of average value as test result using multidigit multi-point test method.Being averaged for deposited metals is hard
Degree is 65.2HRC.
Embodiment 4:Each composition composition quality number of alloy powder block is:57.5 parts of ferrotungsten, 7.0 parts of pureed graphite, vanadium iron
11.0 parts, 5.5 parts of ferrosilicon, 22 parts of reduced iron powder.The mixing powder agglomates for using the technique of coating briquetting that thickness is made as 2mm, uses
Tungsten argon arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Weldering
It is ordinary low-carbon steel, two layers of built-up welding, without apparent weld defect to connect test plate (panel).Using MLS-23 type damp sand rubber type friction-wear tests
Machine carries out abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is that 1.5kg quartz sands are matched
Under conditions of 1kg water, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent 0.0114g.It is hard with HR-150 Rockwells
Degree measurement examination hardness takes 5 points of average value as test result using multidigit multi-point test method.Being averaged for deposited metals is hard
Degree is 65.5HRC.
Embodiment 5:Each composition composition quality number of alloy powder block is:55 parts of ferrotungsten, 6.0 parts of pureed graphite, vanadium iron 10
Part, 5 parts of ferrosilicon, 20 parts of reduced iron powder.The mixing powder agglomates for using the technique of coating briquetting that thickness is made as 2mm, uses tungsten electrode argon
Arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Test piece for welding
For ordinary low-carbon steel, two layers of built-up welding, without apparent weld defect.It is carried out using MLS-23 type damp sand rubber type friction wear testing machines
Abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is that 1.5kg quartz sands match 1kg water
Under conditions of, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent 0.0121g.It is measured with HR-150 Rockwell hardness
Examination hardness takes 5 points of average value as test result using multidigit multi-point test method.The average hardness of deposited metals is
65.1HRC。
Embodiment 6:Each composition composition quality number of alloy powder block is:60 parts of ferrotungsten, 7.5 parts of pureed graphite, vanadium iron 12
Part, 6 parts of ferrosilicon, 25 parts of reduced iron powder.The mixing powder agglomates for using the technique of coating briquetting that thickness is made as 2mm, uses tungsten electrode argon
Arc gas-shielded welder built-up welding.Welding current 130A, Ar throughput 8L/Min, tungsten electrode diameter 2.4mm, nozzle bore 9mm.Test piece for welding
For ordinary low-carbon steel, two layers of built-up welding, without apparent weld defect.It is carried out using MLS-23 type damp sand rubber type friction wear testing machines
Abrasion test.It is 2.5kg in counterweight, abrasive material is the quartz sand of 40~60 mesh, and mortar ratio is that 1.5kg quartz sands match 1kg water
Under conditions of, sample elder generation pre-grinding 1000r, after then regrinding 1000r, wear extent 0.0101g.It is measured with HR-150 Rockwell hardness
Examination hardness takes 5 points of average value as test result using multidigit multi-point test method.The average hardness of deposited metals is
65.9HRC。
The above is only the better embodiment to the present invention, not makees limit in any form to the present invention
System, every any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (4)
1. fabricated in situ WC-VC particles enhance the alloy powder block of coating, it is characterised in that the matter of each constituent of alloy powder block
Measuring number is:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, 10-12 parts of vanadium iron, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder.
2. enhancing the production method of the alloy powder block of coating according to fabricated in situ WC-VC particles described in claim 1, feature exists
In following the steps below:
Step 1:Prepare powdery starting material according to mass fraction:55-60 parts of ferrotungsten, 6-7.5 parts of pureed graphite, vanadium iron 10-12
Part, 5-6 parts of ferrosilicon, 20-25 parts of reduced iron powder;
Step 2:Powdery starting material is put into batch mixer and is adequately mixed, mixed-powder is made;
Step 3:Resulting mixture is adequately stirred after mixed-powder is poured into Arabic gum aqueous solution;
Step 4:Mixture is placed in air dry oven and is heated to 120-160 DEG C, keeps the temperature 2h;
Step 5:It cools to room temperature with the furnace, the alloy powder block of different size series is pressed into the mold of different model.
3. enhancing the production method of the alloy powder block of coating according to fabricated in situ WC-VC particles described in claim 2, feature exists
In:The Arabic gum concentration of aqueous solution is 2-5%, and the aqueous solution addition of Arabic gum is 10- in every 100g mixed-powders
25ml。
4. enhancing the production method of the alloy powder block of coating according to fabricated in situ WC-VC particles described in claim 2, feature exists
In:The alloy powder block is spare with vacuum packing machine encapsulation, in use, taking out alloy powder block after sealing off uses TIG Welding Machine
Built-up welding.
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CN105499840A (en) * | 2015-12-16 | 2016-04-20 | 马鞍山市晨光高耐磨科技发展有限公司 | Novel production process of alloy micro powder welding blocks |
CN110293331B (en) * | 2019-06-24 | 2021-08-17 | 中国航发动力股份有限公司 | Flaky composite brazing filler metal, preparation method and application thereof, and method for welding blade by using flaky composite brazing filler metal |
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CN85102440A (en) * | 1985-04-05 | 1986-10-01 | 机械工业部哈尔滨焊接研究所 | Fe-05 surfacing welding alloy powder agglomates |
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