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

A technology of particle enhancement and laser cladding, applied in metal processing equipment, metal material coating technology, coating, etc., can solve the problems of low energy utilization rate, large heat loss, slow cladding rate, etc., and achieve improved wear resistance Performance and service life, increase the surface processing rate, the effect of smooth surface

Inactive Publication Date: 2018-06-08
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preferably, the present invention provides a particle-reinforced cobalt-based metal powder for ultra-high-speed laser cladding, which is characterized in that it consists of cobalt-based metal powder and oxide or carbide particles, and its ratio is: 50-98% Cobalt matrix metal powder, 2-50% oxide or carbide particles, the oxide or carbide particles selected from Al 2 o 3 , ZrO 2One or more of , WC, TiC; wherein the chemical composition and mass percentage of the cobalt matrix metal powder are: 0.1-2.0%C, 20.0-40.0%Cr, 1.0-20.0%W, 1.0-10.0%Mo, Si ≤1.5%, Fe≤3.0%, Ni≤3.0%, Mn≤1.0%, P≤0.030%, S≤0.030%, the balance is Co and unavoidable impurities;

[0043] Among them, the sphericity of the powder is ≥ 90%, and the fluidity is 32-41 s / 100g.

[0044] Preferably, C 0.1-1.5%.

[0045] Preferably, Cr25-35%.

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

[0047] Preferably, the powder has a D50 of 25-50 μm.

[0048] Preferably, the oxygen content≦150ppm...

Embodiment 2

[0062] The mass fraction of each element is: 1.2%C, 1.0%Si, 1.0%Mn, 31%Cr, 1.0%Mo, 12%W, 3%Ni, P, S≤0.030%, 5%Al2O3 particles, 5% %ZrO2 particles, the balance is cobalt and unavoidable impurities.

[0063] The particle size of the metal powder is: 10-100μm, fluidity: 16s / 50g, sphericity ≥ 94%, D 50 =43μm.

[0064] The preparation method is as follows: the raw material components are alloyed and proportioned, and then the cobalt ingot is vacuum smelted, and the cobalt 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 1.2-3.8MPa, 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 surface of t...

Embodiment 3

[0073] The mass fraction of each element is: 1.2%C, 1.5%Si, 1.0%Mn, 29%Cr, 1.5%Mo, 4.5%W, 3.0%Ni, P, S≤0.030%, 5%WC particles, 10% TiC particles, the balance being cobalt and unavoidable impurities.

[0074] The particle size of the metal powder is: 10-100μm, fluidity: 17 s / 50g, sphericity ≥ 93%, D 50 =41μm.

[0075] The preparation method is as follows: the raw material components are alloyed and proportioned, and then the cobalt ingot is vacuum smelted, and the cobalt 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 1.2-3.8MPa, 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 surface o...

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Abstract

The invention provides a particle-reinforced cobalt-based metal powder for ultra high speed laser cladding. The particle-reinforced cobalt-based metal powder comprises the following components in proportion: 50-98% of cobalt matrix metal powder and 2-50% of oxide / carbide particles. A cobalt matrix comprises the following chemical components in percentage by mass: 0.1-2.0% of C, 20.0-40.0% of Cr, 1.0-20.0% of W, 1.0-10.0% of Mo, less than or equal to 1.5% of Si, less than or equal to 3.0% of Fe, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mn, less than or equal to 0.030% ofP, less than or equal to 0.030% of S, and the balance of Co and inevitable impurities. The particle size of the metal powder is 10-100 [mu]m, and the liquidity of the metal powder is 32-41 s / 100g. Through application of the particle-reinforced cobalt-based metal powder, a laser cladding technology is adopted, and is combined with different processes to reinforce and repair the surface of the matrix.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a particle-reinforced cobalt-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 l...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/00B22F9/08C22C19/07C22C30/00C22C32/00
CPCC22C19/07C22C30/00C22C32/0005C22C32/0026C22C32/0052C23C24/103B22F9/082B22F1/065
Inventor 葛学元王淼辉范斌郭瑞峰杜博睿梁金明
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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