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机械零件的表面裂纹严重影响零件的强度和使用寿命。因此,对一些性能要求高的零件,如在高速、高压或在高低温下运行的零件,都应按照要求的技术规定严格进行检查,以确保安全可靠。渗透探伤和磁粉探伤是目前检查表面裂纹较好的方法,但对空腔、深孔内壁的裂纹,由于裂纹信息难以取出而难以运用。若用超声表面波探伤,则能较方便地进行检查。
Mechanical parts of the surface cracks seriously affect the strength and life of the parts. Therefore, some of the performance requirements of parts, such as high-speed, high-pressure or high temperature operation of the parts should be strictly in accordance with the requirements of the technical requirements of the inspection, to ensure safe and reliable. Penetrating flaw detection and magnetic particle inspection are the better methods to check the surface cracks at present. However, it is hard to use the cracks in the cavity and the deep wall due to the difficulty in removing the crack information. If using ultrasonic surface wave testing, you can more easily check.