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| 表面脱炭; 发动机表面去除积炭 | |||
| 表面脱碳 (【技】将钢加热到一定温度并保温时，由于周围气氛的作用，钢表面的碳全部或部分丧失的现象。在特定的环境气氛条件下，钢中的含碳量越高，加热温度越高，保温时间越长，钢的脱碳程度就越严重。) | |||
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