in negative pressure atmosphere or a vacuum heat treatment known as vacuum heat treatment which not only enables workpiece does not rust or decarbonization and maintain smooth workpiece surface after treatment to improve the performance of the workpiece you can also pass infiltration of agents for chemical heat treatment
在负压气氛或真空气氛下进行热处理称为真空热处理，它不仅能使工件不生锈或脱碳，并在处理后保持工件表面光滑，提高工件的性能，还可以通过渗透剂对工件进行化学热处理
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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