前言苏联冶金界从六十年代中期起,在一些主要的金属杂志上陆续发表了许多文章,从不同角度分析和探讨了1X21H5T等双相钢的脆化原因。从重视的程度以及研究的深度和广度来看,他们在实际应用中必定遇到了这类钢的一个令人发怵的问题——脆裂问题。从1966年开始,随着研究的深入开展,苏联国家标准和黑色冶金部颁标准ЧМ-TY对1X21H5T双相钢的有关规定也不断进行修改和补充。这些标准的修改和补充充分反 Foreword Since the mid-1960s, the Soviet metallurgical industry has published many articles successively in some major metal magazines, analyzing and probing into the causes of the embrittlement of 1X21H5T and other dual-phase steels from different angles. In the light of the degree of emphasis and the depth and breadth of the research, they are bound to encounter, in practical application, a troublesome issue of such steels - the problem of embrittlement. Since 1966, with the deepening of the research, the relevant provisions of the Soviet Union national standard and the ЧМ-TY standard of the Ministry of Black Metallurgy for the 1X21H5T duplex steel are also constantly revised and supplemented. These standards are fully modified and supplemented