调质工艺对V微合金油井管用钢力学性能的影响

doi:10.12068/j.issn.1005-3026.2021.10.007

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (10): 1414-1420.DOI: 10.12068/j.issn.1005-3026.2021.10.007

调质工艺对V微合金油井管用钢力学性能的影响

蔡志辉^{1, 3}，文光奇²，韩阿康²，张开华³

(1. 太原科技大学机械工程学院，山西太原030024; 2. 东北大学材料科学与工程学院，辽宁沈阳110819; 3. 攀钢集团研究院有限公司，四川攀枝花617000)

修回日期:2021-01-04 接受日期:2021-01-04 发布日期:2021-10-22
通讯作者: 蔡志辉
作者简介:蔡志辉(1985-)，男，福建漳州人，太原科技大学教授.
基金资助:
国家自然科学基金资助项目(51974084)；攀钢研究院技术开发合作项目(2019P4C2Q01R)；太原科技大学博士科研启动经费(20202039).

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

CAI Zhi-hui^{1, 3}， WEN Guang-qi²， HAN A-kang²， ZHANG Kai-hua³

1. School of Mechanical Engineering， Taiyuan University of Science and Technology， Taiyuan 030024， China; 2. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 3. Pangang Group Research Institute Co.， Ltd.， Panzhihua 617000， China.

Revised:2021-01-04 Accepted:2021-01-04 Published:2021-10-22
Contact: CAI Zhi-hui
About author:-
Supported by:
-

摘要/Abstract

摘要： 为应对复杂苛刻的工作环境，开发出可以达到Q125钢级标准的高抗拉、抗压和抗挤毁性能的油井管用钢，研究了调质工艺对V微合金化试样微观组织和力学性能的影响.结果表明:经调质处理后的实验钢的微观组织主要是回火马氏体和微量贝氏体，碳化物大量析出，使材料具有良好的综合力学性能.较低的回火温度和较长的回火时间可增加碳化物的析出量，从而增强沉淀强化作用.在610℃下回火70min的综合力学性能最佳，屈服强度、抗拉强度及伸长率分别可达954MPa，989MPa及13.5%. 0℃冲击功横向为25J，轧向为46J，满足Q125钢级油井管标准要求.

关键词: 油井管用钢;V微合金化;调质处理;微观组织;力学性能

Abstract: 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 of carbide precipitations， leading to a higher precipitation hardening. Mechanical properties of the steel after tempering at 610℃ for 70min has the best performance， where the yield strength， tensile strength and elongation can reach 954MPa， 989MPa and 13.5%， respectively. The impact energy at 0℃ is 25J in transverse direction and 46J in rolling direction， which meets the requirements of steel grade of Q125 for oil well pipe.

Key words: steel for oil well pipe; V-microalloying; quenching and tempering treatment; microstructure; mechanical properties

中图分类号:

TP20

蔡志辉，文光奇，韩阿康，张开华. 调质工艺对V微合金油井管用钢力学性能的影响[J]. 东北大学学报（自然科学版）, 2021, 42(10): 1414-1420.

CAI Zhi-hui ， WEN Guang-qi， HAN A-kang， ZHANG Kai-hua. Effect of Quenching and Tempering Treatment on Mechanical Properties of V-microalloyed Steel for Oil Well Pipe[J]. Journal of Northeastern University(Natural Science), 2021, 42(10): 1414-1420.

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调质工艺对V微合金油井管用钢力学性能的影响

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

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