摘要
在油冷、水冷和风冷等3种冷却方式下对常规X100管线钢进行处理,用力学性能试验方法和显微分析方法对处理后X100管线钢的组织和性能进行测试。研究结果表明,在不同的冷却速率下,X100管线钢可获得不同体积分数的贝氏体和铁素体;随着冷却速率的下降,试验钢的强度下降,而塑性、冲击韧度和形变强化能力均增强;当采用油冷的加速冷却方式时,X100管线钢可获得细小的、比例合适的贝氏体+铁素体组成的双相组织,这使大变形管线钢不仅具有高强韧性,而且具备较高的均匀伸长率、形变强化指数和较低的屈强比,可满足大变形管线钢的组织和性能要求。
The processing of conventional X100 pipeline steel was conducted in the three cooling modes inclu- ding oil cooling, water cooling and wind cooling. The mechanical performance test method and microscopic analysis method were used to test the structure and performance of processed X100 pipeline steel material. The research findings show that at different cooling rates, X100 pipeline steel can obtain bainite and ferrite of different volume fractions. With the decrease of cooling rate, the strength of the testing steel decreases but its plasticity, impact toughness and deformation strengthening capacity increase. When the accelerating cooling model of oil cooling is adopted, X100 pipeline steel can obtain the tiny and well-proportioned dual-phase microstructure which consists of bainite and ferrite. The microstructure makes X100 pipeline steel not only maintain the original high and strong toughness but also have high even elongation, deformation strengthening index and low yield ratio, thus satisfying the micro- structure and performance requirement of large deformation pipeline steel.
出处
《石油机械》
北大核心
2014年第4期106-109,共4页
China Petroleum Machinery
基金
国家自然科学基金项目"油气输送管线钢在线碳配增机理
复相结构特征及塑性增长规律研究"(51174165)
关键词
X100管线钢
冷却方式
油冷
水冷
风冷
贝氏体
铁素体
X100 pipeline steel
cooling mode
oil cooling
water cooling
wind cooling
bainite
ferrite
