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| controlled atmosphere heat treatment (【技】工件在加热过程中正确选择炉内气氛得到保护气氛和渗碳及碳氮共渗气氛等，并进行严格控制，从而达到无氧化、无脱碳的光亮退火、正火、淬火、回火、粉末冶金烧结和渗碳、碳氮共渗的热处理工艺。) | |||
| controlled atmosphere heat treatment | |||
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