【作者】 李亮； 纪元； 陆民刚； 兰鹏； 张家泉；

【Author】 Li Liang;Ji Yuan;Lu Min-gang;Lan Peng;Zhang Jia-quan;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;

【机构】 北京科技大学冶金与生态工程学院；

【摘要】 基于JMatPro软件,模拟对比高碳钢盘条中各元素及原奥氏体晶粒度对马氏体形成临界冷速(CCRMf)的影响,建立预测高碳钢CCRMf的表达式并进行验证。结果表明,CCRMf随C、Mn、Si、Cr元素含量的增大而减小,随S元素和原奥氏体晶粒度的增大而增大,P元素对CCRMf几乎没有影响。C和Mn元素对CCRMf的影响最大。结合实际生产中元素含量及偏析特性,建议高碳钢连铸过程应重点控制C、Mn元素偏析,并在轧制过程注意细化奥氏体晶粒尺寸,以减少马氏体组织的形成。更多还原

【Abstract】 The effect of chemical composition and original austenite grain size in high carbon steel wire rod on the critical cooling rate of martensite formation(CCR_Mf) was simulated and compared based on the software JMatPro.The formula to forecast the CCR_Mfwas established and verified.CCR_Mf decreases with the increasing element content of C,Mn,Si and Cr,while increases with the increasing of S content and the original austenite grain size.The content of P has little effect on CCR_Mf-C and Mn have the greatest influence on CCR_Mf.If taken the chemical composition segregation of high carbon casting slab into consideration,it is necessary to reduce the C segregation and Mn segregation in continuous casting production and control the austenite grain size in rolling production in order to avoid the formation of martensite.更多还原