西安石油大学学报（自然科学版）2017，Vol.32Issue(3)：99-104,6.DOI:10.3969/j.issn.1673-064X.2017.03.016
高钢级管线钢形变硬化行为及其影响因素分析
Strain-hardening Behavior of High Grade Linepipe Steel and Its Influence Factors
摘要
Abstract
The strain hardening behavior of X80 and X90 longitudinal submerged arc welding linepipe with single or dual phase microstructure in different directions were analyzed.It is found that the pipeline steel with bainite and ferrite dual-phase microstructure possesses better plastic deformation ability than the pipeline steel with bainite single-phase microstructure;the stress-strain curve shape of the former in the transverse direction is different from that of the latter,and it has obvious yielding platform,which leads to their difference in the varying law of deformation hardening exponent.This is because there are a certain part of ferrite with low dislocation density in the pipeline steel with dual-phase microstructure and the circumferential strain produced in manufacturing process causes strain aging.关键词
高钢级管线钢/形变硬化/应变时效/位错密度Key words
high grade pipeline steel/strain hardening/strain ageing/dislocation density分类
能源科技引用本文复制引用
吉玲康,封辉,张继明,徐彤,王海涛..高钢级管线钢形变硬化行为及其影响因素分析[J].西安石油大学学报（自然科学版）,2017,32(3):99-104,6.基金项目
中国石油天然气集团公司科技重大专项“第三代大输量天然气管道工程关键技术研究”(编号:2012E-2801) （编号:2012E-2801）
