Comprehensive Control on Microstructures and Properties of Medium Carbon V-N Microalloyed Steel Seamless Oil-Well Tubes of Hot-Rolling Non-Quenched/Tempered

摘要：

The relationship between microstructures and mechanical properties of a medium carbon V-N microalloyed steel used for N80 seamless oil-well tubes of hot rolling non-quenched/tempered (non-Q&T) was investigated. The results have shown that volume percentages of upper bainite, modified bainite and ferrite have a decisive influence on impact energies of steel tubes. When the total volume percentage of bainite is larger than 5％, the impact energy of tubes can not satisfy with the industrial criteria. Moreover, if the total volume percentage of bainite is smaller than 5％, then the impact energy of steel tubes enhances with volume percentage of ferrite increasing. The final microstructures have closely relation with tube billet quality, controlled cooling temperature after tube rolling and cooling method after stretch-reduction-diameter. High quality of medium carbon V-N microalloyed steel for non-Q&T oil-well tubes can be produced through comprehensive control of microstructures and mechanical properties in sub-procedures, especially for tube billet quality and controlled cooling parameters.

关键词： medium carbon V-N microalloyed steel N80 grade seamless oil-well tube microstructure mechanical property

作者: LIU Sheng-xin LIU Guo-quan CHEN Yong ZHANG Yong-gang HUANG Jian-kai

作者单位: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China;School of School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, C School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China Wuxi Seamless Steel Tube Company, Ltd., Wuxi 214026, China

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 799-803

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）