渗碳工艺对20CrMo钢盲孔渗层深度的影响

Effect of carburizing process on hardened depth of blind hole of 20CrMo steel

为解决盲孔渗碳的难题,分析比较了常规气体渗碳及真空低压渗碳工艺对20CrMo钢盲孔的渗碳能力。结果表明,采用真空低压渗碳工艺对盲孔内部的渗碳能力远高于常规气体渗碳工艺;且盲孔尺寸越小,真空度越高,渗碳能力就越好。常规气体渗碳及真空低压渗碳的气体状态不同,是引起两种工艺对盲孔内部渗碳能力不同的主要原因。

To solve the problem of blind hole carbonization,the carburizing capacity of conventional gas carburizing and vacuum low-pressure carburizing to the blind holes of 20 CrMo steel were analyzed and compared.The results show that the carburizing capacity of vacuum low-pressure carburizing to the blind hole is much higher than that of the conventional gas carburizing,and the smaller the size of the blind hole,the higher the vacuum,the better the carburizing capacity is.The different gas states of the conventional gas carburizing and vacuum low-pressure carburizing are the main reasons for the different carburizing capacity of the two processes for blind hole inner surface.