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兵工学报  2010 

塑料模具钢表面激光熔覆陶瓷复合涂层的性能研究

, PP. 933-938

Keywords: 金属材料,塑料模具钢,陶瓷涂层,激光熔覆,硬度,耐磨性

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Abstract:

?为了提高覆层的硬度和耐磨性,在塑料模具钢P20表面预置非晶的纳米Al2O3,TiC,WC等陶瓷硬质颗粒的涂层,采用CO2激光器进行熔覆处理。对激光熔覆陶瓷复合层的显微组织结构进行了分析,并测试了其硬度和耐磨性。结果表明:通过高能量密度的激光处理,基体和熔覆层元素相互扩散与反应,其中的WC,Al2O3,FeSi成为熔覆层中的硬质相,显著提高了材料的硬度和耐磨性。磨损后熔覆层表面主要为细小的划痕,其磨损方式主要为磨粒磨损。

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