赵先锐,左敦稳,程虎,李勤涛,戴晟,冯尚申

• 1:台州学院
• 2:南京航空航天大学机械工程学院

摘要(Abstract)：

采用TJ-HL-5000横流CO2连续激光器在2738塑料模具钢表面制备了WxC/Ni基合金涂层。利用金相显微镜、SEM、EDS、XRD、显微硬度计以及摩擦磨损试验机等检测设备研究了激光熔覆涂层组织及性能。XRD分析结果表明,熔覆层的主要物相有γ-Ni、W2C、WC、M23C6(M=Cr,Ni,Mo,W)、NiCr和Cr2O3等。金相显微镜、SEM和EDS分析结果表明,结合区为良好冶金结合,结合区为FeNiCrW合金,厚度为20μm左右;基体对熔覆层合金的稀释度很低;熔覆层从界面向外依次分布着平面晶区、细等轴晶区、粗树枝晶区以及表面细晶区。显微硬度计结果表明,熔覆层的硬度值平均约900 HV1,是基体硬度的2.8倍左右。摩擦磨损试验结果表明,与基体相比熔覆层的耐磨性有了很大提高。

关键词(KeyWords)： 2738钢;激光熔覆;Ni基碳化钨合金;显微组织

Abstract:

Keywords:

基金项目(Foundation): 浙江省教育厅科研计划项目(Y201119602);; 航空科学基金(2010ZE52056);; 浙江省工量刃具检测与深加工技术研究重点实验室开放基金(ZD201201)

作者(Author): 赵先锐,左敦稳,程虎,李勤涛,戴晟,冯尚申

DOI: 10.13289/j.issn.1009-6264.2013.04.034

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