稀土对高镍铬合金铸铁热疲劳性能的影响  

Effect of Rare Earth Elements on Thermal Fatigue of High Ni-CrAlloy Cast Iron

作　　者：王爱荣[1] 杨庆祥[1] 任学军[1] 吴浩泉[1] 张志华[1] 

机构地区：[1]燕山大学材料系,黑龙江省华夏经济技术开发公司

出　　处：《中国稀土学报》1996年第1期52-55,共4页Journal of the Chinese Society of Rare Earths

摘　　要：研究了高镍铬合会铸铁热轧辊用材料的裂纹形成和在热循环４０和７０周次后裂纹的扩展过程。结果表明：稀土元素的加入，能明显提高高镍铬合金铸铁热轧辊用材料的抗热疲劳性能，使裂纹出现时冷热循环次数提高４２％～１６３％。同时给出稀土加入量以０．０５ｗｔ％～０．１５ｗｔ％为宜。The effect of rare earth (RE) on crack forming and developing during thermal fatigue test was investigated with the spcimens of hot rolled high Ni-Cr alloy cast iron. The experimental results show that the serviceable life of hot rolled high Ni-Cr alloy cast iron after being cycled 40 times and 70 times can be improved. The number of cycle for crack appeared on speciment surface was increasedby 42% ￣ 163%. It is conclused that the optimum amount of RE addition is about 0. 05 wt%￣0. 15 wt%.

关 键 词：稀土 高镍铬合金铸铁 热疲劳性能 铸铁 热轧辊 

分 类 号：TG333.17[金属学及工艺—金属压力加工]