贝氏体组织类型对780MPa级低碳贝氏体钢力学性能的影响  

Effect of Bainitic Microstructure Type on Mechanical Properties of 780MPa Low Carbon Bainitic Steel

作　　者：赵燕青 孙力 刘宏强 田志强 姚纪坛 潘进 王九清 ZHAO Yanqing;SUN Li;LIU Hongqiang;TIAN Zhiqiang;YAO Jitan;PAN Jin;WANGJiuqing(Hesteel Group Technology Research Institute,Shijiazhuang 050023,China;Hesteel Group Wusteel Company,Pingdingshan 462500,China)

机构地区：[1]河钢集团钢研总院,河北石家庄050023 [2]河钢集团舞钢公司,河南平顶山462500

出　　处：《热加工工艺》2019年第20期148-150,共3页Hot Working Technology

摘　　要：研究了不同贝氏体组织类型对780 MPa级低碳贝氏体钢力学性能的影响。结果表明:粒状贝氏体组织中的M/A岛无序地分布在贝氏体铁素体边界及基体上,板条贝氏体中,细小薄膜状M/A岛平行于板条束,板条特征明显;不同贝氏体组织类型对试验钢的力学性能有明显的影响,板条贝氏体类型低碳贝氏体钢的强度及冲击韧性均优于粒状贝氏体组织类型低碳贝氏体钢。实际工业生产中,应控制试验钢得到板条贝氏体。The effect of different bainite microstructure types on the mechanical properties of 780 MPa grade low carbon bainite steel was studied. The results show that, the M/A island in granular bainite is disorderly distributed on the boundary and matrix of bainite ferrite. In the lath bainite, the thin film M/A island is parallel to the lath beam, and the lath characteristic is obvious. Different types of bainite structure have obvious influence on the mechanical properties of test steel. The strength and impact toughness of lath bainite type low carbon bainite steel are better than those of granular bainite structure type low carbon bainite steel. In large-scale production, it should be control led to obtain lath bainite in the test steel.

关 键 词：粒状贝氏体 板条贝氏体 低碳贝氏体钢 力学性能 

分 类 号：TG156[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]