全管体扩径对X80螺旋埋弧焊管力学性能影响规律研究  

Study on the Effect of Full Tube Diameter Expansion on Mechanical Properties of X80 SAWH Pipe

作　　者：毕宗岳 牛辉[1,2] 牛爱军 韦奉[1,2] 黄晓辉 茹翔[2] 王刚 谭赟[1,2] BI Zongyue;NIU Hui;NIU Aijun;WEI Feng;HUANG Xiaohui;RU Xiang;WANG Gang;TAN Yun(Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods,Baoji 721008,Shaanxi,China;Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,Shaanxi,China)

机构地区：[1]国家石油天然气管材工程技术研究中心,陕西宝鸡721008 [2]宝鸡石油钢管有限责任公司,陕西宝鸡721008

出　　处：《焊管》2022年第11期10-15,共6页Welded Pipe and Tube

基　　金：国家重点研发计划项目“低温高压服役条件下高强度管线用钢--低温X80钢管制造及应用技术研究”(项目编号2017YFB0304904)。

摘　　要：采用全管体扩径技术,研究了X80钢级Φ1219 mm×22 mm螺旋埋弧焊管扩径前后力学性能的变化情况。结果表明,随着扩径率的增大,屈服强度和抗拉强度均有不同程度的增加,屈强比也随之增大,冲击韧性略有下降,DWTT性能变化不明显。在扩径率为0.88%情况下,管体横向屈服强度提高了15.2%,抗拉强度提高了5.8%,屈强比增大了9.8%;管体横、纵向屈服强度一致性提高了51.8%。总体上通过全管体扩径,管材力学性能的一致性得到进一步提高。The mechanical properties of X80Φ1219 mm×22 mm SAWH pipe before and after diameter expansion are studied by using full tube diameter expansion technology.The results show that with the increase of the diameter expansion rate,the yield strength and tensile strength increase to varying degrees,the yield ratio also increases,the impact toughness decreases slightly,and the performance of DWTT is not significantly changed.With an expansion rate of 0.88%,the transverse yield strength of the tube is increased by 15.2%,the tensile strength has increased by 5.8%,and the yield ratio has increased by 9.8%;and the consistency of the transverse and longitudinal yield strength of the tube has increased by 51.8%.Generally speaking,through the expansion of the full tube,the consistency of the mechanical properties of the tube has been further improved.

关 键 词：X80管线钢 螺旋缝埋弧焊管 机械扩径 力学性能 

分 类 号：TG113.25[金属学及工艺—物理冶金]