钛、铌、硼对低碳贝氏体钢组织与性能的影响  

Influence of Ti,Nb and B on Microstructure and Mechanical Properties of Low Carbon Bainitic Steel

作　　者：颜慧成[1] 曹慧泉[1,2] 罗登[3] 李广敏[1] 夏政海[3] 刘家琪[1] 

机构地区：[1]钢铁研究总院国家连铸技术工程研究中心,北京100081 [2]湖南华菱管线股份有限公司,湖南长沙410011 [3]湖南华菱湘潭钢铁有限公司技术开发中心,湖南湘潭411101

出　　处：《钢铁研究学报》2010年第5期55-58,共4页Journal of Iron and Steel Research

摘　　要：以C-Mn钢和700 MPa级低碳贝氏体钢成分为基础成分,通过调整微合金元素含量,实验室条件下熔炼浇注钢锭,并采用TMCP技术轧制钢板,研究了微合金元素钛、铌、硼对低碳贝氏体钢组织与性能的影响。结果表明,随着铌含量的增加,贝氏体含量增加,晶粒变细,材料的抗拉强度、屈服强度与韧性均增加;随着钛含量的增加,贝氏体含量增加,抗拉强度、屈服强度提高,韧性的变化与是否进行回火处理有关;硼有利于形成板条贝氏体组织,硼含量增加能提高强度,但有损韧性。The influence of Ti,Nb and B on microstructure and mechanical properties of low carbon bainitic steel was investigated by adjusting Ti,Nb and B content respectively in C-Mn steels and 700MPa low carbon bainitic steels,using micro-alloying and TMCP technology to produce plate in experimental condition.The ratio of bainite rise with increase in the content of Nb,and Rm,ReL,AK of low carbon bainitic steel increase with the increment of niobium.With the increment of titanium content,the ratio of bainite increases,and the steel strength is improved,toughness is affected by the heat treatment process.With the increment of boron content,lath-like bainite is formed,the strength is improved but toughness is weakened.

关 键 词：低碳贝氏体钢 微合金元素 组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]