二、钢坯缺陷的检查钢坯缺陷的检查是采用非破坏性的方法进行的。其中主要有:磁粉探伤法、涡流探伤法、浸透法和超声波探伤法等。虽然方法不少,但是没有一种方法是万能的,所以必须根据预期的目的和具体情况,选择某一种或某两种方法并用。 Second, the billet defect inspection Billet defect inspection is a non-destructive method. Among them are: magnetic particle inspection method, eddy current testing method, soaking method and ultrasonic testing method. Although there are many ways, no one method is omnipotent, so one or two methods must be selected according to the intended purpose and the specific situation.