摘要
研究了Co基自熔合金、Ni基自熔合金 +WC、Co基自熔合金 +WC激光熔覆层在不同温度下的显微组织和各种化合物的硬度 ,结果表明三种材料在相同激光熔覆工艺参数下获得的熔覆层的高温显微组织、性能存在很大的差异。Ni基自熔合金 +WC在 70 0℃时硬度开始显著降低且显微组织发生很大变化 ,而Co基自熔合金和Co基自熔合金 +WC在 70 0℃时才开始发生变化且变化幅度较小。同时证明WC在加热过程中硬度没有显著降低。试验结果对获得具有抗高温粘着磨损的激光熔覆层有重要的理论和实际意义。
Microstructure and hardness of self-smelting Co-base alloy without WC, self-smelting Ni-base alloy plus WC and self-smelting Co-base alloy plus WC powder feeding laser cladding layers at different temperatures were studied experimentally. The results show that microstructures and properties of three layers significantly differ in structure and property under the same laser processing parameters. For the Ni-base alloy, The hardness decreases markedly at 700°C with an obvious structural change; for the Co-base alloys, the changes starts only at 700°C, and the change with temperatures is smaller. Also, it is proved that no prodigious change in the hardness of WC can be observed with the rise of temperature.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2002年第5期12-14,共3页
Transactions of The China Welding Institution
基金
国家杰出青年基金资助项目 (5 962 5 10 2 )
吉林省工业发展基金项目资助 (19980 10 1-0 8)
关键词
辊锻模具
激光熔覆层
高温显微组织
高温硬度
Ceramic materials
Clay
Dies
High temperature properties
Laser applications
Rolls (machine components)
