摘要
通过改变熔敷金属中Co元素的含量、焊后热处理工艺和堆焊层数 ,对时效硬化工具合金TIG金属粉芯焊丝堆焊金属的硬度、红硬性和时效硬化机理进行了研究。研究结果表明 :Co元素含量和焊后热处理工艺对堆焊金属的硬度和红硬性有显著影响 ;当采用 5 6 0℃× 2 .5h时效处理可使堆焊金属获得最佳时效效果 ;随Co含量增加 ,堆焊金属的硬度和红硬性增加 ,最高硬度可达 70 .2HRC ,经 6 5 0℃加热 6h后的硬度仍能保持在 6
By changing the content of cobalt and the technology of postheat treatment the following subjects are studied: the hardness and redhardness, the age hardening mechanism of the surfacing metal of metal powder-cored wire which is a type of age hardening tool alloy for TIG surfacing. The results of the study show that the effects of cobalt content and postheat treatment on hardness and redhardness are notable. With the increasing of cobalt content in deposited metal the hardness and redhardness of surfacing metal rise apparently. The hardness of surfacing metal can go up to HRC 69.4 and remain above HRC 60 after heated at 650°C for 6 hours. The optimum age technology is 560°C×2.5 h.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2002年第3期49-52,共4页
Transactions of The China Welding Institution
基金
北京市自然科学基金资助项目 ( 3992 0 0 5 )
