两种不同成分X70M管线钢在HFW焊管中的应用  

Applications of Two X70M Linepipe-purposed Steels with Different Chemical Compositions to Manufacture of HFW Pipes

作　　者：胡松林[1] 肖光成[1] 

机构地区：[1]宝山钢铁股份有限公司,上海200940

出　　处：《钢管》2015年第2期55-58,共4页Steel Pipe

摘　　要：介绍了两种不同成分X70M钢级管线钢(A钢和B钢)在HFW焊管上的应用,从化学成分、冲击韧性、DWTT性能、对接性能、焊管整体性能等方面分析了其在HFW制管过程中的性能变化情况。应用表明:A钢在制管后屈服强度和抗拉强度呈现较小的变化,质量稳定性明显;B钢在制管后屈服强度有明显下降,抗拉强度无明显变化,有相对经济的制造成本优势;A钢和B钢在强度、韧性和焊接性方面均满足HFW制管工艺的要求。Elaborated here in the paper are the applications of two X70M linepipe-purposed steels with different chemical compositions （i. e., Steel A and Steel B） to manufacture of HFW pipes. And analyzed are the changes of the properties of the two steels as occurring during the manufacturing process of the HFW pipes, involving chemical composition, impact toughness, DWTT property, butting property, and weld pipe integrity, etc. The application results show that after being turned out as pipes, changes of yield strength and tensile strength of Steel A is just a little, while quality stability thereof is obvious. As for Steel B, its yield strength is decreased obviously after pipefor- ming, whereas its tensile strength almost remains the original, and thus cost-effectiveness of pipe-making with Steel B is comparatively advantageous. Speaking of strength, toughness and weldability, both steels are up to the requirements as for HFW pipe manufacturing process.

关 键 词：HFW焊管 X70M钢级 管线钢 两种成分 力学性能 

分 类 号：TG457.11[金属学及工艺—焊接]