一年过去,又是新春。过去一年中,我国热处理工作者在科研和生产上都取得了可喜的进展。近年来,由于测试设备逐步现代化,在热处理理论和组织与性能关系方面做了一些工作。例如:对粒状贝氏体的形态有了初步研究,提出了M-A组织;对不同钢种(T8,T9和50钢)的淬火组织,找出了片状与板条状马氏体形成先后的规律,以及对其性能的影响;试验分析了上贝氏体与下贝氏体韧性差别的原因,比较了贝氏体与回火马氏体韧性高低以及贝氏体组织的显微断口形貌等;还发现了15与20钢中魏氏组织对钢的冲击性能不仅没有不 One year later, it is a new year. In the past year, our country’s heat treatment workers made gratifying progress in both scientific research and production. In recent years, due to the gradual modernization of testing equipment, some work has been done on the theory of heat treatment and the relationship between organization and performance. For example, the morphology of granular bainite has been preliminarily studied, and the MA structure has been proposed. For the quenched structure of different steel grades (T8, T9 and 50), the order of lamellar and lath martensite has been found Regularity and the influence on its performance. The reason of the difference of ductility between upper bainite and lower bainite was analyzed. The toughness of bainite and tempered martensite and the microscopic fracture morphology of bainite were compared Etc .; also found that 15 and 20 Wei steel in the impact of steel on the performance not only no no no