| ASTM4130钢再热粗晶热影响区组织及韧性分析 |
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| 引用本文： | 李立英,王勇,李宏伟,韩涛,黎超文.ASTM4130钢再热粗晶热影响区组织及韧性分析[J].焊接学报,2011,32(6):33-36. |
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| 作者姓名： | 李立英 王勇 李宏伟 韩涛 黎超文 |
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| 作者单位： | 1. 中国石油大学(华东)机电工程学院,东营,257061
2. 上海外高桥造船有限公司,上海,200137 |
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| 基金项目： | 国家863高技术研究发展计划资助项目 |
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| 摘 要： | 采用金相、扫描电镜、透射电镜和焊接热模拟方法,研究了二次热循环对ASTM4130钢焊接粗晶热影响区(CGHAZ)显微组织、冲击韧性和断口形貌的影响.结果表明,再热粗晶热影响区低温冲击韧性均低于母材,发生热影响区整体脆化.临界粗晶区(IRCGHAZ)冲击吸收功损失分别为母材和CGHAZ的96.6%和37.9%,脆化现象最...
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| 关 键 词： | ASTM4130钢 焊接热模拟 热影响区 冲击韧性 断口形貌 |
| 收稿时间： | 2010/3/25 0:00:00 |
Microstructure and toughness in reheated CGHAZ of ASTM4130 steel |
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| LI Liying,WANG Yong,LI Hongwei,HAN Tao and LI Chaowen.Microstructure and toughness in reheated CGHAZ of ASTM4130 steel[J].Transactions of The China Welding Institution,2011,32(6):33-36. |
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| Authors: | LI Liying WANG Yong LI Hongwei HAN Tao and LI Chaowen |
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| Affiliation: | College of Mechanical and Electronic Engineering, China University of Petroleum(Eastchina), Dongying 257061, China,College of Mechanical and Electronic Engineering, China University of Petroleum(Eastchina), Dongying 257061, China,Shanghai Waigaoqiao Shipbuilding Co., Ltd, Shanghai 200137, China,College of Mechanical and Electronic Engineering, China University of Petroleum(Eastchina), Dongying 257061, China and College of Mechanical and Electronic Engineering, China University of Petroleum(Eastchina), Dongying 257061, China |
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| Abstract: | The effect of different second peak temperatures on microstructure,impact toughness and fracture morphology in the reheated coarse-grained heat-affected zone(CGHAZ) of ASTM4130 steel was systematically investigated by using matallography,SEM,TEM and the welding thermal simulation test.The results show that low temperature impact toughness of the reheated CGHAZ is lower than the base metal,which indicates that the embrittlement of overall heat-affected zone(HAZ) occurs.The intercritically reheated coarse-grained HAZ(IRCGHAZ) becomes the local brittle zone with its toughness loss by 96.6% and 37.9% compared with that of the base metal and CGHAZ respectively.Meanwhile,the toughness of the supercritically reheated coarse-grained HAZ(SCCGHAZ) and the unaltered coarse-grained HAZ(UACGHAZ) decreases by 20.9% and 14.1% compared with that of CGHAZ respectively.The embrittlement of IRCGHAZ and SCCGHAZ is attributed to coarse grain caused by "structure heredity" as well as the formation of M-A constituent,and the fracture morphology is characteristic of quasi-cleavage with "fracture heredity" features.The reasons for the lower toughness of UACGHAZ are both the coarse grain and the existence of M-A constituent,and it fractures also by a quasi-cleavage mode. |
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| Keywords: | ASTM4130 steel thermal simulation heat-affected zone impact toughness fracture morphology |
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