该文研究了循环热处理对 35 Cr Ni3Mo V钢晶粒特征和机械性能的影响。在所试验的条件下 ,试样通过二次循环热处理后 ,就能获得均匀细小的晶粒。同时 ,再经调质处理后 ,能获得高强度、高韧性和塑性的综合机械性能。经适宜次数的循环热处理后 ,不但综合机械性能优于经常规工艺处理的 ,同时跟常规工艺相比 ,具有热处理工艺短 ,生产率高 ,耗能少等优点 This paper studies the effect of cyclic heat treatment on the grain properties and mechanical properties of 35 Cr Ni3Mo V steel. Under the conditions tested, the sample after repeated heat treatment, you can get uniform fine grains. At the same time, after quenching and tempering, to obtain high mechanical strength, high toughness and plastic mechanical properties. After the appropriate number of cycles of heat treatment, not only the overall mechanical properties than the conventional process, compared with the conventional process, with a short heat treatment process, high productivity, low energy consumption and other advantages