不同弯曲方式对热轧卷板包辛格效应的影响  

Influence of Different Bending Modes on Bauschinger Effect of Hot⁃rolled Coil

作　　者：孙宏[1,2] 韩秀林 孙志敏[1,2] 郑青昊 闵祥玲[3] 宗秋丽 刘常庆 邓军焕 SUN Hong;HAN Xiulin;SUN Zhimin;ZHENG Qinghao;MIN Xiangling;ZONG Qiuli;LIU Changqing;DENG Junhuan(North China Petroleum Steel Pipe Co.,Ltd.,Qingxian 062658,Hebei,China;Hebei High Pressure Pipeline Spiral Welded Pipe Technology Innovation Center,Qingxian 062658,Hebei,China;Research Institute of Bohai Equipment Manufacturing Co.,Ltd.,Qingxian 062658,Hebei,China)

机构地区：[1]华油钢管有限公司,河北青县062658 [2]河北省高压管线螺旋焊管技术创新中心,河北青县062658 [3]渤海石油装备公司研究院,河北青县062658

出　　处：《焊管》2025年第3期50-54,共5页Welded Pipe and Tube

摘　　要：为了研究螺旋埋弧焊管用热轧卷板弯曲变形后的强度变化,对热轧卷板进行了不同方式的弯曲试验以获得接近成型后钢管的曲率,并通过对比卷板弯曲前后的拉伸性能,测量板材的包辛格效应值。结果表明,采用A、B、C三种弯曲方式,板材的屈服强度均出现了下降,其中C弯曲方式屈服强度下降最大,而A和B弯曲方式屈服强度下降较小。对于L485M钢级,实验室模拟方法获得的包辛格效应值与实际焊管成型产生的包辛格效应值比较接近,相差只有5 MPa。该方法实现了在钢管成型前对板材包辛格效应的快速高效预测。In order to study the strength change of spiral submerged arc welding pipe after bending deformation,the bending test of hot rolled coil was carried out to obtain the curvature of the steel pipe after forming,and the Bauschinger effect of the coil was measured by comparing the tensile properties before and after bending.The results show that the yield strength of the sheet decreases when three bending modes A,B and C are adopted,in which the yield strength of the C bending mode decreases the most,while the yield strength of the A and B bending modes decreases less.For L485M steel grade,the Bauschinger effect value obtained by the laboratory simulation method is close to the Bauschinger effect value produced by the actual welded pipe forming,the difference is only 5 MPa.The method can predict Bauschinger effect quickly and efficiently before steel tube forming.

关 键 词：螺旋埋弧焊管 热轧卷板 包辛格效应 弯曲 屈服强度 

分 类 号：TG302[金属学及工艺—金属压力加工]