稀土元素对53Cr21Mn9Ni4N气阀钢组织和性能的影响

Effect of Rare Earth Elements on Microstructure and Performance of 53Cr21Mn9Ni4N Valve Steel

研究了不同含量稀土元素对53Cr21Mn9Ni4N气阀钢的宏观力学性能的影响;以及不同的稀土含量对微观组织的影响。结果表明:适量(0.1wt%)的稀土元素加入后会显著的提高气阀钢在常温下的屈服强度;并且可以细化奥氏体晶粒、减轻轧制织构、使碳化物弥散分布以及使黑色层状析出相的尺寸大大减少。

The effect of different content of rare earth elements on the macroscopic mechanical properties and the microstructure of 53Cr21Mn9Ni4N valve steel were studied.The results show that the addition of rare earth elements of 0.1wt%will significantly improve the yield strength of valve steel at room temperature,and can refine austenite grain,reduce rolling texture,make carbides disperse,and also reduce the size of black layered precipitates.