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| 轧后冷速对X120管线钢组织和强度的影响 | |
| 引用本文： | 高建忠,郭斌,徐进桥,郭爱民,王青峰.轧后冷速对X120管线钢组织和强度的影响[J].材料热处理学报,2011,32(12). |
| 作者姓名： | 高建忠 郭斌 徐进桥 郭爱民 王青峰 |
| 作者单位： | 1. 燕山大学亚稳材料制备与科学国家重点实验室,河北秦皇岛,066004 2. 燕山大学亚稳材料制备与科学国家重点实验室,河北秦皇岛066004／武汉钢铁公司武钢研究院,湖北武汉430080 3. 武汉钢铁公司武钢研究院,湖北武汉,430080 |
| 基金项目： | 国家高技术研究发展计划(863)(2007AA03Z509) |
| 摘 要： | 研究了X120管线钢模拟控扎后冷却速度对组织性能的影响。扫描（SEM）和电子背散射衍射（EBSD）观察结果表明,提高控轧后冷速可以得到有效晶粒尺寸细小的板条贝氏体,有利于提高大角度晶界百分比,并结合力学性能测试结果,得出细小的板条贝氏体和大角度晶界有利于提高管线钢强度。利用透射电镜和能谱分析研究了实验钢中Nb、Ti等微合金元素的析出规律,冷速越大析出相粒子越细小弥散,沉淀析出强化效果越好。细晶强化、晶界强化和析出相强化等都是管线钢强化的主要方式。 |
| 关 键 词： | 管线钢 贝氏体 晶界 析出 强化 |
Effect of cooling rate on microstructure and strength of a X120 pipeline steel after rolling |
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| GAO Jian-zhong,GUO Bin,XU Jin-qiao ,GUO Ai-min ,WANG Qing-feng.Effect of cooling rate on microstructure and strength of a X120 pipeline steel after rolling[J].Transactions of Materials and Heat Treatment,2011,32(12). | |
| Authors: | GAO Jian-zhong GUO Bin XU Jin-qiao GUO Ai-min WANG Qing-feng |
| Affiliation: | GAO Jian-zhong1,GUO Bin1,2,XU Jin-qiao 2,GUO Ai-min 1,WANG Qing-feng 1 (1.State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China,2.Research and Development Center of WISCO,Wuhan 430080,China) |
| Abstract: | Effect of cooling rate on microstructure and mechanical properties of X120 pipeline steel after rolling was investigated by simulation on a Gleeble-3500 simulator,SEM,EBSD,TEM and tensile tests.The results show that with the increasing cooling rate,bainite lath is refined and volume fraction of high-angle grain boundary increases,and thus strength of the pipeline steel increases.The precipitation behavior of microalloy(Nb,Ti) carbonitrides was examined by transmission electron microscopy and EDS analysis.Th... |
| Keywords: | pipeline steel bainite grain boundary precipitation strengthening |
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