中华人民共和国《0Cr17Ni4Cu4Nb马氏体沉淀硬化不锈钢金相检验》船舶行业标准于1991年11月23～25日通过部级审查。该标准从我国军工生产的特点出发,提出了该钢金相检验的显微组织状态、晶粒度和δ—铁素体含量的检验要求、评级方法和标准评定级别图。其分级和评级方法科学完整,检验方法切实可行,尤其是关于 People’s Republic of China “0Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel metallographic examination” industry standard ship in November 23, 1991 to 25 through the ministerial review. Based on the characteristics of China’s military production, this standard puts forward the microstructure state, grain size and δ-ferrite content inspection requirements, grading methods and standard grading charts of the metallographic examination of the steel. The grading and rating methods are scientific and complete, and the test methods are feasible, especially about