许长庆,李贵江

• 1:河北工业大学材料科学与工程学院

摘要(Abstract)：

利用激光表面合金化技术在AISI321不锈钢表面制备了TiC增强复合涂层。X射线衍射结果表明,复合涂层主要由TiC、Cr6C23和奥氏体相组成;金相观测显示复合涂层组织细小、均匀,无裂纹和气孔,与基体形成良好的冶金结合;激光表面合金化复合涂层显微硬度达400HV,约为基体的2倍,且呈阶梯分布;在室温油润滑磨损试验条件下,复合涂层磨损量和摩擦系数均小于基体;利用扫描电子显微镜观测到复合涂层磨损表面划痕较浅且平滑,无明显的犁沟、粘着、剥落现象,表现出了优异的耐磨性。

关键词(KeyWords)： 激光表面合金化;TiC;微观组织;显微硬度;耐磨性

Abstract:

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基金项目(Foundation):

作者(Author): 许长庆,李贵江

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