Powder material suitable for laser cladding reinforcement of cutting pick sheath layer

A technology of laser cladding and powder materials, applied in metal material coating process, coating, transportation and packaging, etc., can solve problems such as alloy head peeling and tooth body wear, increase hardness and toughness, save use cost, Excellent red hardness effect

Pending Publication Date: 2022-01-18
上海盖泽激光科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, after a large number of analyzes on the failed picks, it was found that the sheath layer is the weak link of the entire pick. Most of the picks are caused by the wear of the sheath layer first, and then the wear of the tooth body. After the wear of the tooth body, the alloy head peels off. , which requires a high-hardness strengthened powder as a material to make the sheath layer to achieve the purpose of prolonging the service life of the pick

Method used

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  • Powder material suitable for laser cladding reinforcement of cutting pick sheath layer
  • Powder material suitable for laser cladding reinforcement of cutting pick sheath layer

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Effect test

Embodiment 1

[0023] A powder material suitable for laser cladding strengthening of the sheath layer of the pick. The material components used for cladding include: C, Cr, W, Mo, Ti, Nb, Fe and other alloying elements; the specific composition is: 0.6wt%C , 13wt% Cr, 2wt% W, 1wt% Mo, 0.2wt% Ti, 0.1wt% Nb and 83.1wt% Fe, and the powder was prepared by vacuum atomization, inert gas protection gas atomization and water atomization Prepared by one of the powder methods, the powder is spherically distributed, the sphericity is ≥80%, and the oxygen content is ≤180ppm. The powder is strengthened by martensitic strengthening and in-situ carbide fine dispersion precipitation, and the average hardness of the strengthening layer reaches HRC65- 67. The particle size of the powder is between 15-150 μm, the fluidity of the powder is 25-38s / 100g, the carbon content in the powder is relatively high, after the carbon melts and solidifies, it dissolves into the martensite to form a medium carbon martensite, a...

Embodiment 2

[0029] A powder material suitable for laser cladding strengthening of the sheath layer of the pick, the material components used for cladding include: C, Cr, W, Mo, Ti, Nb, Fe and other alloying elements; its specific composition is: 1wt%C, 18wt% Cr, 5wt% W, 3wt% Mo, 0.8wt% Ti, 0.4wt% Nb and 71.8wt% Fe, Fe is a pure iron block with no rust on the surface, no impurities and high purity, C, Cr, W, Mo, Ti and Nb all exist in the form of pure substances, and the purity of C, Cr, W, Mo, Ti and Nb is 99.8%, and the powder preparation adopts vacuum air atomization method, inert gas protection gas atomization method and It is prepared by one of the water atomization powder making methods, the powder is distributed in a spherical shape, the sphericity is ≥80%, and the oxygen content is ≤180ppm. The hardness reaches HRC65-67, the powder particle size is between 15-150μm, the powder fluidity is 25-38s / 100g, and the carbon content in the powder is relatively high. After the carbon melts a...

Embodiment 3

[0035] A powder material suitable for laser cladding strengthening of the sheath layer of the pick. The material components used for cladding include: C, Cr, W, Mo, Ti, Nb, Fe and other alloying elements; the specific composition is: 0.8wt%C , 15wt% Cr, 3wt% W, 2wt% Mo, 0.5wt% Ti, 0.3wt% Nb and 78.4wt% Fe, Fe is a pure iron block with no rust on the surface, no impurities, and high purity, C, Cr, W , Mo, Ti and Nb all exist in the form of pure substances, and the purity of C, Cr, W, Mo, Ti and Nb is 99.8%, and the powder preparation adopts vacuum air atomization method and inert gas protection gas atomization method It is prepared by one of the water atomization powder making methods. The powder is distributed in a spherical shape, the sphericity is ≥80%, and the oxygen content is ≤180ppm. The powder is strengthened by martensitic strengthening and in-situ carbide fine dispersion precipitation. The average hardness reaches HRC65-67, the powder particle size is between 15-150μm...

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Abstract

The invention discloses a powder material suitable for laser cladding reinforcement of a cutting tooth sheath layer. The material for cladding comprises the following components of C, Cr, W, Mo, Ti, Nb, Fe and other alloy elements, and the following specific components of 0.6-1.0 wt% of C, 13-18 wt% of Cr, 2-5 wt% of W, 1-3 wt% of Mo, 0.2-0.8 wt% of Ti, 0.1-0.4 wt% of Nb and the balance of Fe. In the formula, about 0.2-0.4 wt% of carbon forms martensite, the rest martensite forms a compound with W, Mo, Ti and Nb, the carbon is melted and dissolved in the martensite to form carbon martensite, the hardness and toughness of the material are improved, meanwhile, the Cr content is high, the Cr is dissolved in the martensite in a solid mode, the oxidation resistance is improved, C interacts with W, Mo, Ti and Nb, fine and dispersed single or composite carbides are separated out in situ, the hardness and wear resistance of a cladding layer are improved, therefore the comprehensive strengthening effects of martensite strengthening, fine grain strengthening, in-situ carbide fine and dispersed precipitation strengthening and the like are generated, the average hardness of a strengthening layer reaches HRC65-67, and the service life is prolonged by 1-2 times compared with an existing cutting pick.

Description

technical field [0001] The invention relates to the technical field of pick production, in particular to a powder material suitable for laser cladding strengthening of a sheath layer of a pick. Background technique [0002] At present, no matter coal picks or mining picks in the market, most of them are pick picks, and the structure of pick picks is generally divided into alloy head, tooth body and sheath layer. The alloy head is generally prepared by cemented carbide powder metallurgy, and its hardness is above HRC80. The tooth body is generally made of medium and low carbon alloy steel, such as 42CrMo, 35MnB and other materials, after quenching + tempering process, its hardness is between HRC42-HRC50. There is a hardness difference of HRC20 degrees between the tooth body and the alloy head, so it will cause problems such as premature wear of the tooth body and peeling of the alloy head during use. In order to solve this problem, a plasma stack is used on the tooth body ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/22C22C38/28C22C38/26B22F9/08B22F1/065C23C24/10
CPCC22C38/22C22C38/28C22C38/26B22F9/082C23C24/103B22F2009/0824B22F2009/0828
Inventor 周立涛王爱华王永杰王海涛方虎范天昊
Owner 上海盖泽激光科技有限公司
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