卷取温度对CSP铁素体轧制低碳钢组织性能的影响  

Influence of coiling temperature on microstructure and properties for low carbon steel rolled by CSP ferrite

作　　者：王承剑 胡学文[1] 彭欢[1] 吴志文 余宣洵 Wang Chengjian;Hu Xuewen;Peng Huan;Wu Zhiwen;Yu Xuanxun(Technology Center,Ma′anshan Iron and Steel Co.,Ltd.,Ma′anshan 243000,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《锻压技术》2022年第9期158-162,共5页Forging & Stamping Technology

基　　金：安徽省科技重大专项资助项目(18030901075)。

摘　　要：采用不同卷取温度的CSP铁素体轧制工艺生产低碳钢,通过显微组织、微观析出物、位错密度及性能测试研究了卷取温度对CSP铁素体轧制低碳钢组织和性能的影响。研究结果表明:试样组织均由较粗的铁素体+少量珠光体组成,析出物为Al、Ti、Si的氧化物或氮化物,部分还与MnS复合;卷取温度由700℃下降至620℃时,屈服强度和抗拉强度分别增加了31.6和25.9 MPa,硬度波动范围由12 HRB上升至25 HRB。提高卷取温度可以促进铁素体晶粒均匀化长大、降低位错密度,能够有效降低强度并提高性能的均匀性。Low carbon steel was produced by CSP ferrite rolling process under different coiling temperatures,and the influences of coiling temperature on the microstructure and properties of CSP ferrite-rolled low carbon steel were studied by microstructure,micro-precipitation,dislocation density and performance tests.The research results show that the sample structure is composed of coarser ferrite and a small amount of pearlite,the precipitates are oxides or nitrides of Al,Ti and Si,and some are also compounded with MnS.When the coiling temperature drops from 700°C to 620°C,the yield strength and the tensile strength increase by 31.6 and 25.9 MPa,respectively,and the hardness fluctuation range increases from 12 HRB to 25 HRB.Thus,increasing the coiling temperature can promote the growth and homogenization of ferrite grains,reduce the dislocation density,effectively reduce the strength and improve the uniformity of performance.

关 键 词：卷取温度 铁素体轧制 显微组织 力学性能 位错 

分 类 号：TG335.1[金属学及工艺—金属压力加工]