【摘要】 本文研究了稀土元素对热轧辊用钢６０ＣｒＭｎＭｏ热疲劳性能的影响，同时对不同稀土含量的６０ＣｒＭｎＭｏ钢高温短时拉伸件能和硬度进行了比较。试验结果表明：稀土元素可明显提高６０ＣｒＭｎＭｏ钢的热疲劳寿命和塑件，抑制６０ＣｒＭｎＭｏ钢的循环软化，并得出稀土元素的合适含量为０．０５％～０．１０％。更多还原

【Abstract】 AbstractThe effect of rare eatth (RE)addition on thermal fatigue of the hot roller steel 60CrMnMo was investigated.At the same time the high temperature short time tensile propersies and hard-ness with different RE addition of 60CrMnMo were compared.The results showed that by adding a certain amount of RE in steel 60CrMnMo,its life span about thermal fatigue and pla-sticity could be improved cons iderably.And its cycle soften can be restrained,thereby leading to the conclusion that optimum amount of RE addition is about 0.05～0.10%更多还原