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目前,国内安全阀中主要关键件,如滑阀、锥阀、提动阀座等,原工艺设计采用钢材为42CrMo,热处理工艺为调质后软氮化。而提动阀钢材为GCr15,热处理采用正常淬火、回火处理。软氮化是化学热处理的一种。经软氮化后的零件表面能获得一个厚度为10～20微米的连续氮化物层,其硬度HV_(0.05)为700～750,具有较好的耐磨性和耐蚀性,但限于厂方生产条件及软氮化工艺尚不稳定,实际生产中对上述零
At present, the main key components in the domestic safety valve, such as spool valve, cone valve, poppet valve seat, the original process design using steel 42CrMo, heat treatment process for the quenched and tempered soft nitriding. The poppet valve steel GCr15, heat treatment using the normal quenching and tempering. Soft nitriding is a chemical heat treatment. After nitrocarburizing the surface of the component can obtain a continuous nitrided layer with a thickness of 10 to 20 microns with a hardness of HV_ (0.05) of 700 to 750, which has good abrasion resistance and corrosion resistance, but is limited to the factory Production conditions and soft nitriding process is not stable, the actual production of the above zero