60CrMnMo钢热疲劳裂纹生成与长大及稀土的作用  

Formation and Growth of Thermal Fatigue Crack and Function of Rare Earth Elements in Steel 60CrMnMo

作　　者：杨庆祥[1] 王爱荣[1] 廖波[1] 姚枚[1] 

机构地区：[1]燕山大学材料系

出　　处：《中国稀土学报》1996年第2期182-185,共4页Journal of the Chinese Society of Rare Earths

摘　　要：采用金相和扫描电镜等手段对６０ＣｒＭｎＭｏ钢热疲劳裂纹的萌生和长大规律进行了分析，并考查了稀土在钢中的作用。结果表明：热疲劳裂纹萌生于钢中夹杂物处；热疲劳裂纹的生长，不仅是裂纹自身发展的结果，更主要的是裂纹的相互联接。钢中加入稀土后，可以变质钢中夹杂物。The characteristics of formation and growth of thermal fatigue crack was invesigated by means of optical microscope and scanning electron microscope, and the function of RE elements was examined in steel 60CrMnMo. The results show that the thermal fatigue cracks formated in the inclusions in the steel 60CrMnMo and not only they were growed by themselve spreading but also joined eath other in main way. The inclusion was modified by adding RE elements in steel 60CrMnMo so that the thermal fatigue crack could be restrained.

关 键 词：钢材 热疲劳裂纹 稀土元素 抑制作用 热轧辊 

分 类 号：TG333.17[金属学及工艺—金属压力加工]