铝合金表面激光熔覆SiC颗粒增强复合耐磨涂层研究Study on Laser Cladding of Wear-Resistant SiC Particle Reinforced Composite Layer on Aluminium Alloy Surface
王冬涛,李会山,王惠滨
摘要(Abstract)：
采用激光熔覆技术在铝合金表面制备SiC颗粒增强的N i基合金复合涂层,其中SiC粉末采用预置和同步送粉两种方法。试验结果表明,在激光功率P=2kW、光斑直径d=3m m、扫描速度v=3m m s/工艺条件下,预置SiC粉末厚度1m m或送粉量m p=8gm/in,可以获得表面平、无裂和界面结合较好的熔覆层。测试了熔覆层的硬度和滑动摩擦磨损性能,分析了熔覆层的硬化机理,熔覆层中存在颗粒强化、固溶强化等强化作用,熔覆层的显微硬度达到900～1100H V,其耐磨性能比铝合金显著提高。
关键词(KeyWords)： 铝合金;激光熔覆;SiC熔覆层;耐磨性能
基金项目(Foundation):
作者(Author): 王冬涛,李会山,王惠滨
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