柴油机重要零部件的表面无损检验是按百分数抽查,或按数学统计法进行的。为此几乎都是使用磁粉试验方法。对于说明问题或评价的可靠性来说,关健的是所得到的磁化的场强和场的分布。对于形状复杂的零件,要对试验数据选优,以便在关键的部位得到对不完善性足够的了解,另一方面要排除虚假的显示。 Surface non-destructive testing of important diesel engine components is spot-check, or by mathematical statistics. Almost all of this is the use of magnetic particle testing methods. The key to account for the reliability of the problem or evaluation is the field strength and field distribution of the resulting magnetization. For parts with complex shapes, test data should be chosen so that there is sufficient knowledge of the imperfections at key points and, on the other hand, to exclude false displays.