Effect of Quenching and Tempering Treatment on Mechanical Properties of V-microalloyed Steel for Oil Well Pipe

被引：0

作者：

Cai Z.-H. ^{[1
,3
]}

Wen G.-Q. ^{[2
]}

Han A.-K. ^{[2
]}

Zhang K.-H. ^{[3
]}

机构：

[1] School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan

[2] School of Materials Science & Engineering, Northeastern University, Shenyang

[3] Pangang Group Research Institute Co., Ltd., Panzhihua

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2021年 / 42卷 / 10期

关键词：

Mechanical properties; Microstructure; Quenching and tempering treatment; Steel for oil well pipe; V-microalloying;

D O I：

10.12068/j.issn.1005-3026.2021.10.007

中图分类号：

学科分类号：

摘要：

In order to cope with in complex and harsh work environments, a new-typed steel for oil well pipe has been developed, whose tensile strength, compressive strength and collapse resistant can reach steel grade of Q125. The effect of quenching and tempering(Q&T)treatment on microstructure and mechanical properties of the V-microalloyed steel was studied. The results show that the microstructure of the experimental steel after Q&T treatment contains tempered martensite, a little bainite and a large number of carbide precipitations, so that the steel has good comprehensive mechanical properties. Lower tempering temperature and longer tempering time can increase the amount of carbide precipitations, leading to a higher precipitation hardening. Mechanical properties of the steel after tempering at 610 ℃ for 70 min has the best performance, where the yield strength, tensile strength and elongation can reach 954 MPa, 989 MPa and 13.5%, respectively. The impact energy at 0 ℃ is 25 J in transverse direction and 46 J in rolling direction, which meets the requirements of steel grade of Q125 for oil well pipe. © 2021, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：1414 / 1420

页数：6

共 22 条

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