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| 含硼低合金高强度钢焊接热影响区冲击韧度 | |
| 引用本文： | 段贵生,陈伟庆,孙斌.含硼低合金高强度钢焊接热影响区冲击韧度[J].北京科技大学学报,2009,31(8). |
| 作者姓名： | 段贵生 陈伟庆 孙斌 |
| 作者单位： | 1. 北京科技大学冶金与生态工程学院,北京,100083;安阳钢铁集团公司技术中心,安阳,455004 2. 北京科技大学冶金与生态工程学院,北京,100083 3. 安阳钢铁集团公司技术中心,安阳,455004 |
| 摘 要： | 利用Gleeble热模拟机对含硼低合金高强度钢板进行不同焊接工艺下的热模拟实验,研究了焊接热影响区(HAZ)的过热区显微组织、韧度及其变化规律.结果表明:钢板过热区冲击韧度随冷却时间t8/3的增大而显著降低;当t8/3小于67s时,过热区冲击韧度较高,相应过热区组织为板条马氏体或板条马氏体+贝氏体,晶粒较细小.800MPa级低碳贝氏体钢板焊接工艺实验结果表明,焊接热输入量为0.96～2.11kJ.mm-1、焊道间温度为150～200℃和焊后热处理,焊接接头焊缝金属和焊接热影响区的冲击韧度保持较高水平,说明钢板对焊接工艺有较强的适应性. |
| 关 键 词： | 低合金高强度钢 硼 焊接热影响区 显微组织 冲击韧度 |
Impact toughness in the welding heat affected zone of HSLA steel with boron |
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| DUAN Gui-sheng,CHEN Wei-qing,SUN Bin.Impact toughness in the welding heat affected zone of HSLA steel with boron[J].Journal of University of Science and Technology Beijing,2009,31(8). | |
| Authors: | DUAN Gui-sheng CHEN Wei-qing SUN Bin |
| Abstract: | The microstructure and toughness in the welding heat affected zone (HAZ) of boron containing high-strength low-alloy (HSLA) steel plates were investigated by means of thermal simulation with a Gleeble thermal simulator. The results show that the toughness in the overheated zone decreases significantly with the increase of cooling time t8/3. When t8/3 below 67 s,the impact toughness in the overheated zone is higher,the structure is lath martensite or lath martensite + bainite,and the grain is finer. Since th... |
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