DIN73126我们的是英文的,不过英文也是这个意思,我也没见过德文的,估计你们也是根据英文翻译的.
5.1 Surface decarburization
Ferrite and bainite are not permissible in the carburized zone.
Surface decarburization is permissble up to a maximun hardness drop of 50 HV1,whereby hardness values may not fall below the minimum surface hardness of 57 HRC.