HFW高频焊接管线管屈强比的控制与探讨  

Control of HFW Linepipe Yield Strength Ratio and Related Discussion

作　　者：胡松林[1] 屈献永[1] 张曙华[1] HU Songlin;QU Xianyong;ZHANG Shuhua(Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]宝山钢铁股份有限公司,上海201900

出　　处：《钢管》2020年第5期23-25,共3页Steel Pipe

摘　　要：介绍了管线钢的强化机理,分析了HFW管线管在不同拉伸试验方法下的试验结果,并对比纵向试样与横向试样的屈强比。分析认为:与胀环法拉伸试样相比,检测HFW管线管拉伸性能时采用板状拉伸试样,测得的屈服强度、屈强比数值相对较离散,这与加工板状拉伸试样时的硬化效应有关,但不会对材料的抗变形能力产生显著影响;随着HFW管线管强度的提高,其屈强比会小幅上升;管线管的纵向屈强比高于横向屈强比,其差值随管线管厚径比的增加而增大。The strengthening mechanism of the linepipe steel is briefed.The results of the tensile tests as made tothe HFW linepipe with different methods are analyzed,and the yield strength ratio of the longitudinal specimen iscompared with that of the transversal specimen.It is regarded via the analysis tha compared with the specinen for theexpanding-ring lest,the plate specimen is employed for testing the tensile property of the HFW linepipe,resulting inrelatively scaltered yield strength and yield strength ratio data,which is related to the hardening effect as produced whenprocessing the plate specimen,but only so slightly affects the deformation-resistance of the material.Along with theincrease of the HFW linepipe's strength,the yield strengh ratio is a little bit increased.The pipe's longitudinal yieldstrength ratio is higher than the transversal yield strength ratio,and the difference between the two is increased alongwith the increase of the DIS ratio of the linepipe.

关 键 词：管线管 高频焊接 屈强比 强化机理 

分 类 号：TG113.251[金属学及工艺—物理冶金]