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球铁正火后一定要回火吗?

2025-03-31 17:24:45

推荐回答（1个）

回答1：

球铁正火后不一定要进行回火。但是有些球铁(如；采用低碳奥氏体正火加部分球化回火).为了提高其综合性能需要进行回火处理。通过正火加回火处理可以是球墨铸铁获得低碳的球状。片状珠光体加少量破碎状铁素体的混合组织。

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