黑皮的管理和控制

xuqingyang

各位大神：
       请教！关于工件感应淬火后工件产生的黑皮，如何来控制？淬火液中的氧化皮及杂质如何管理？有无相关参考可以提供下，谢谢！

shengxia

The black skin appears in induction hardening is undoubtedly oxide skin, so why does induction hardening appear oxide skin?I think there are two things you should pay attention to.
The first is not the induction heating time is too long and caused.
Second, if there is no problem with the process, then is the original surface of the workpiece itself not removed.
None of the above points are seriously affecting the quality of products.Oxide scale and impurities can be installed in a filtration system, filtered out.

PipeHeat

不了解你的具体情况，一般情况下感应加热淬火是不太会产生氧化皮的，如果是铸造或热轧等原始表面，则取决于原始的氧化程度

JG_Wen

the black layer should be oxide layer, it comes from the raw part skin or the cleaning/cooling fluid remained before hardening. but it shall be thin and hard, it's difficult to remove completely. you could add an inert gas shield to avoid the oxide skin.
Additionally, as per dealing with the skins in the quenching medium, to add a paper band filter.

by the way, please write Eng. or other language in this BBS channel.

热处理老马

除非原来工件存在氧化皮，只能淬火爆掉，如果是加热时产生的，可以用保护介质，不产生氧化皮也就是啦