东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (10): 1411-1414.DOI: -

• 论著 • 上一篇    下一篇

球墨铸铁表面连续激光沉积高速钢粉末涂层的工艺与组织性能

许妮君;刘常升;商硕;孙挺;   

  1. 东北大学材料各向异性与织构教育部重点实验室;利物浦大学工程系;东北大学理学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 出版日期:2012-10-15 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(51074050,5125011080);;

Techniques and performance of high speed steel powder cladding by continuous laser on nodular cast iron surface

Xu, Ni-Jun (1); Liu, Chang-Sheng (1); Shang, Shuo (2); Sun, Ting (3)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China; (2) Department of Engineering, University of Liverpool, Liverpool L693GQ, United Kingdom; (3) School of Sciences, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Online:2012-10-15 Published:2013-04-04
  • Contact: Liu, C.-S.
  • About author:-
  • Supported by:
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摘要： 采用大功率连续CO2激光器对预置了高速钢粉末的球墨铸铁基体进行激光辅助金属沉积处理.得到了激光沉积的优化工艺参数,用该参数制备的沉积层组织致密、无气孔、无裂纹等缺陷,沉积层与基体为冶金结合.XRD分析表明,Ni60+T15+T15沉积层中V4C3,WC1-x,CoCx等硬质相起到弥散强化的作用,Ni60+T15+T15沉积层平均硬度值为716HV,是基体的2.2倍.Ni60+YT12+YT12沉积层中起强化作用的Cr7C3相主要分布在晶界间,Ni60+YT12+YT12沉积层平均硬度值为739HV,约为基体的2.3倍.

关键词: 连续激光沉积, 高速钢粉末, 球墨铸铁, 微结构, 硬度

Abstract: The continuous CO2 laser was applied to clad a strengthening layer of high speed steel on the surface of nodular cast iron rolls. The cladding is dense, pore- and crack-free, and the combination between cladding and substrate is metallurgical. The optimized laser processing parameters were obtained. The main strengthening phases in Ni60+T15+T15 cladding are V4C3, WC1-x and CoCx. The average microhardness of the cladding is 716 HV, which is about 2.2 times as high as that of the substrate. The main strengthening phase in Ni60+YT12+YT12 cladding is Cr7C3 distributed mainly on the grain boundary. The average microhardness of cladding is 739 HV, about 2.3 times of the value for substrate.

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