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作者:

Liu, Yingpeng (Liu, Yingpeng.) | Wang, Kaiming (Wang, Kaiming.) | Fu, Hanguang (Fu, Hanguang.) (学者:符寒光) | Yang, Xiaojun (Yang, Xiaojun.) | Lin, Jian (Lin, Jian.)

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摘要:

Laser cladding nickel-based alloy coating has dense microstructure and good bonding with base material, but its wear resistance is difficult to meet the requirements of harsh environment. In order to enhance the microhardness and wear resistance of nickel-based coatings, NbC (0.6 < d < 5 mu m) was added directly to Ni45 powder to prepare laser cladding nickel-based composite coatings. By studying the microstructure, microhardness and wear resistance, it was found that the main phases in the coating were gamma-Ni solid solution and precipitated phases such as Cr23C6, Cr7C3 and NbC. The addition of NbC inhibits the formation of Cr23C6 and the total carbide content within the coating is reduced, which limited the further improvement of the microhardness of the coating. Due to the refining effect of Nb, the dendrite arm spacing was reduced up to 64.7% of the 1# coating, and the grain size was reduced to 60.0% of the 1# coating, and the coatings demonstrate better wear resistance during frictional wear.

关键词:

microstructure nickel-based coating wear resistance laser cladding direct addition of NbC

作者机构:

  • [ 1 ] [Liu, Yingpeng]Beijing Univ Technol, Dept Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
  • [ 2 ] [Fu, Hanguang]Beijing Univ Technol, Dept Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
  • [ 3 ] [Yang, Xiaojun]Beijing Univ Technol, Dept Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
  • [ 4 ] [Lin, Jian]Beijing Univ Technol, Dept Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Kaiming]Changsha Univ Sci & Technol, Coll Automobile & Mech Engn, Changsha, Peoples R China

通讯作者信息:

  • [Fu, Hanguang]Beijing Univ Technol, Dept Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China;;

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来源 :

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

ISSN: 1059-9495

年份: 2023

期: 22

卷: 33

页码: 12437-12451

2 . 3 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:26

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