吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (3): 891-899.doi: 10.13229/j.cnki.jdxbgxb201703028

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H13钢激光熔覆钴基复合涂层的组织及耐磨性

杨晓红1, 杭文先1, 秦绍刚1, 刘勇兵1, 刘利萍2   

  1. 1.吉林大学 材料科学与工程学院,长春 130022;
    2.长春职业技术学院 工程分院,长春 130033
  • 收稿日期:2016-05-06 出版日期:2017-05-20 发布日期:2017-05-20
  • 通讯作者: 刘利萍(1979-),女,博士研究生.研究方向:有色金属材料.E-mail:look-see@163.com
  • 作者简介:杨晓红(1966-),女,研究员,博士.研究方向:汽车轻量化材料强化及微观组织.E-mail:xhyang@jlu.edu.cn
  • 基金资助:
    吉林省发改委高技术产业发展专项项目(2013G038); 吉林省重点科技攻关项目(20160204017GX)

Microstructure and wear properties of Co-based composite coatings on H13 steel surface by laser cladding

YANG Xiao-hong1, HANG Wen-xian1, QIN Shao-gang1, LIU Yong-bing1, LIU Li-ping2   

  1. 1.College of Materials Science and Engineering, Jilin University, Changchun 130022,China;
    2.College of Engineering Branch,Changchun Vocational Institute of Technology, Changchun 130033, China
  • Received:2016-05-06 Online:2017-05-20 Published:2017-05-20

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摘要： 采用5 kW连续CO2激光器,在H13热作模具钢表面进行激光熔覆Stellite-6(简称St6)、St6+5%WC、St6+5%WC+1%RE钴基合金复合涂层。采用光学显微镜、扫描电子显微镜、X射线衍射仪、显微硬度计及磨损试验机,对熔覆层的显微组织、元素分布、相组成、显微硬度及磨损性能等进行了系统研究。结果表明,激光熔覆层与基体为冶金结合,各熔覆层的基体相组织为γ-Co、γ-Ni,增强相组织均包括Cr-Ni-Fe-C、(Mn,Cr)7C3、Cr23C6等相,此外,St6+5%WC和St6+5%WC+1%RE熔覆层的增强相中增加了WC、W2C和SiC相;熔覆层显微硬度HV0.2为560~710HV;摩擦磨损试验结果表明,在相同条件下,耐磨性能由高到低依次是St6+5%WC+1%RE、St6+5%WC、St6、H13钢。

关键词: 金属材料, 激光熔覆, H13钢, 钴基自熔性粉末

Abstract: Stellite-6, St6 in short, St6+5%WC, St6+5%WC+1%RE cobalt base self-fluxing powders were employed to enhance the H13 steel surface in CO2 laser cladding process. The microstructure, elements distribution, phase composition etc. of the coatings were investigated using Optical Microscope (OM), Scanning Electron Microscope(SEM) and X-ray Diffraction (XRD).The micro-hardness and were-resisting property of the coatings were studied using micro-hardness tester and friction wear testing machine. The analysis shows that a metallurgical combination is formed between the laser cladding layer and the surface. All cladding coatings are composed of γ-Co and γ-Ni solid solutions as the matrix phase, Cr-Ni-Fe-C,(Mn, Cr)7C3 and Cr23C6 as the wild phase. Furthermore, the phase compositions of St6+5%WC, St6+5%WC+1%RE also contain WC W2C and SiC phases. The micro-hardness of the cladding is in the range 560~710 HV0.2. Under the same testing conditions, the wear-resisting performance of the four materials is in the order: St6+5%WC+1%RE > St6+5%WC>St6>H13 steel.

Key words: metallic material, laser cladding, H13 steel, Co-based fluxed powder

中图分类号: 

  • TG142
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