摘要
为了改善机械零件的表面性质，利用２ｋＷＣＷＣＯ２激光在金属或零件表面熔覆０．１０～１０．００ｍｍ的金属合金和ＷＣ复合耐磨涂层；并研究了其微观结构和硬度分布与熔覆工艺的关系；为了减少和避免耐磨涂层发生裂纹而设计了具有硬质相分布的“梯度涂层”，或在硬质表层和基体之间增加具有良好韧性的“过渡层”，获得了无缺陷，与基体冶金结合的优质涂层。在一些磨损零件的激光熔覆修复中，可延长使用寿命２～３倍以上。
Wear resistant cladding layers which consist of metal alloy and WC composite, 0.10 to 10.00mm thick, were obtained on the surface of metals or workpieces with the 2kW CW CO 2 laser. The microstrcture and the relationship between hardness and the processing parameters were studied. The “gradient layer”, where the percentage of the hard phase was different, and the “transition layer” with enough toughness between the hard layers and the substrates were adopted to reduce and avoid the cracks in the wear resistant layers. The cladding layer were free from cracks and were well combined with the substrates. When utilized in repairing worn workpieces, the layers played a good performane, having double or treble the lifetime of the workpieces.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第10期32-34,共3页
Journal of Tsinghua University(Science and Technology)
关键词
激光熔覆
耐磨性
WC复合涂层
金属合金
laser cladding
wear resistance
WC composite cladding layer
