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Particle reinforced iron-based metal powder for ultra-high speed laser cladding

A particle reinforced, iron-based metal technology, applied in metal processing equipment, metal material coating technology, coating and other directions, can solve the problems of low energy utilization, large heat loss, high density, etc., to improve wear resistance and Service life, improved surface processing rate, smooth and smooth surface

Active Publication Date: 2018-06-01
中机新材料研究院(郑州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional laser cladding technology, because the laser energy mainly acts on the surface of the substrate, the powder temperature is lower than the melting point, the heat loss is large, the energy utilization rate is low, the cladding rate is slow, and the heat-affected zone is large, which seriously restricts the laser cladding technology. Promoted application of
[0003] Traditional iron-based metal materials have a series of advantages such as low cost, good machinability, weldability, corrosion resistance, and heat treatment, but they have high density, low specific strength, wear resistance and high temperature stability need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preferably, the present invention provides a particle-reinforced iron-based metal powder for ultra-high-speed laser cladding, which is characterized in that it consists of iron-based metal powder and oxide or carbide particles, and its ratio is: 50-98% Iron matrix metal powder, 2-50% oxide or carbide particles, the oxide or carbide particles are selected from Al 2 o 3 , ZrO 2One or more of , WC, TiC; the chemical composition and mass percentage of the iron matrix metal powder are: 0.03-2%C, 0.50-2.80%Si, 0.30-1.60%Mn, 2-12%Cr, 0.5% -3%V, 0.5-4%Mo, 0.3-1%Nb, P≤0.030%, S≤0.030%, 0.05-3.0%B, the balance is Fe and unavoidable impurities;

[0043] Among them, the sphericity of the powder is ≥ 90%, and the fluidity is 32-45 s / 100g.

[0044] Preferably, B0.05-1.5%.

[0045] Preferably, Si0.5-2.5%.

[0046] Preferably, the particle size distribution is: 10-100 μm.

[0047] Preferably, the powder has an average strength D50 of 25-50 μm.

[0048] Preferably, the oxygen con...

Embodiment 2

[0062] The mass fraction of each element is: 0.30%C, 1.8%Si, 0.70%Mn, 3.0%Cr, 2.2%Mo, 0.95%V, P≤0.030%, S≤0.030%, 0.2%B, 5%Al2O3 particles , 5% ZrO2 particles, the balance is Fe and unavoidable impurities.

[0063] The particle size of the metal powder is: 10-100μm, fluidity: 16 s / 50g, sphericity ≥ 90%, D 50 =43μm.

[0064] The preparation method is as follows: the raw material components are alloyed and proportioned, and then the steel ingot is vacuum melted, and the steel ingot is melted by medium frequency induction heating, and the vacuum degree of the melting chamber is 10 -1 -10 -2 Pa, using the gas atomization method to make powder, the argon pressure of the powder spraying gas is 1.5-3.5MPa, and the powder is collected and sieved for particle size.

[0065] Apply the sieved powder, adopt ultra-high-speed laser cladding technology, and match different processes to repair the surface of the substrate.

[0066] Machining the substrate surface.

[0067] Wipe the surfa...

Embodiment 3

[0073] The mass fraction of each element is: 0.42%C, 1.7%Si, 0.85%Mn, 3.2%Cr, 1.9%Mo, 1.02%V, P≤0.030%, S≤0.030%, 1.6%B, 10%WC particles , 10% TiC particles, the balance being Fe and unavoidable impurities.

[0074] The particle size of the metal powder is: 10-100μm, fluidity: 17 s / 50g, sphericity ≥ 90%, D 50 =42μm.

[0075] The preparation method is as follows: the raw material components are alloyed and proportioned, and then the steel ingot is vacuum melted, and the steel ingot is melted by medium frequency induction heating, and the vacuum degree of the melting chamber is 10 -1 -10 -2 Pa, using the gas atomization method to make powder, the argon pressure of the powder spraying gas is 1.5-3.5MPa, and the powder is collected and sieved for particle size.

[0076] Apply the sieved powder, adopt ultra-high-speed laser cladding technology, and match different processes to repair the surface of the substrate.

[0077] Machining the substrate surface.

[0078] Wipe the surf...

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Abstract

The invention provides particle reinforced iron-based alloy powder for ultra-high speed laser cladding. The iron-based alloy powder is composed of iron matrix metal powder and oxide particles or carbide particles and comprises 50-98% of iron matrix metal powder and 2-50% of oxide particles or carbide particles, wherein an iron matrix is composed of, by mass, 0.03-2% of C, 0.50-2.80% of Si, 0.30-1.60% of Mn, 2-12% of Cr, 0.5-3% of V, 0.5-4% of Mo, 0.3-1% of Nb, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 0.05-3.0% of B and the balance Fe and inevitable impurities. Theparticle size of the metal power is 10-100 microns, and the flowability of the metal power is 32-45 s / 100 g. By adopting the particle reinforced iron-based metal powder, the laser cladding technologyis adopted and matched with different processes for reinforcing and repairing matrix surfaces.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a particle-reinforced iron-based metal powder for ultra-high-speed laser cladding. Background technique [0002] Laser cladding technology is a surface hardening process technology, which refers to adding selected coating materials on the surface of the substrate through different filler methods, and using a high-power-density laser beam to melt it and the extremely thin layer on the surface of the substrate at the same time. And after rapid solidification, a surface coating with extremely low dilution and metallurgical bonding with the substrate is formed, thereby significantly improving the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of the base surface. In the traditional laser cladding technology, because the laser energy mainly acts on the surface of the substrate, the powder temperature is lower than the melting point, the heat loss is lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F9/08B22F1/00C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C22C38/32C22C32/00
CPCC22C32/001C22C32/0052C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C22C38/32C23C24/103B22F9/082B22F1/065
Inventor 王淼辉葛学元范斌郭瑞峰梁金明杜博睿
Owner 中机新材料研究院(郑州)有限公司
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