| 低成本Q345钢高强度厚板的开发 |
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| 引用本文： | 李婧,赵德文,刘相华,杜林秀,何元春,隋鹤龙. 低成本Q345钢高强度厚板的开发[J]. 机械工程材料, 2009, 0(10) |
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| 作者姓名： | 李婧 赵德文 刘相华 杜林秀 何元春 隋鹤龙 |
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| 作者单位： | 东北大学轧制技术及连轧自动化国家重点实验室,沈阳,110004;秦皇岛首秦金属材料有限公司,秦皇岛,060003;首钢技术研究院,北京,100041 |
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| 基金项目： | 国家自然科学基金重点资助项目(50634030); 国家科技支撑计划资助项目(2006BAE03A08) |
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| 摘 要： | 采用TMCP工艺制备了厚度为85 mm的Q345高强度钢板,通过拉伸和冲击试验、组织及断口形貌观察等对其组织和性能进行了分析。结果表明:制备的Q345钢厚板的表面组织为多边形铁素体+大量贝氏体的混合组织,其余部位均为铁素体+珠光体组织,屈服强度达到320 MPa以上,伸长率在29%以上,冲击韧性良好;该钢不添加微合金元素,轧后不进行热处理,降低了生产成本,实现了强韧性的良好匹配。
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| 关 键 词： | Q345钢 宽厚板 TMCP工艺 组织 力学性能 |
Development of Low Cost Q345 High Strength Heavy Steel Plate |
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| LI Jing,ZHAO De-wen,LIU Xiang-hua,DU Lin-xiu,HE Yuan-chun,SUI He-long. Development of Low Cost Q345 High Strength Heavy Steel Plate[J]. Materials For Mechanical Engineering, 2009, 0(10) |
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| Authors: | LI Jing ZHAO De-wen LIU Xiang-hua DU Lin-xiu HE Yuan-chun SUI He-long |
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| Affiliation: | LI Jing1,ZHAO De-wen1,LIU Xiang-hua1,DU Lin-xiu1,HE Yuan-chun2,SUI He-long3(1.State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,China,2.Qinhuangdao Shouqin Metal Materials Co.,Qinhuangdao 066003,3.Shougang Research Institute of Technology,Beijing 100041,China) |
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| Abstract: | The 85 mm Q345 high strength heavy steel plates were prepared through thermo-mechanical controll cooling(TMCP) process.By means of tensile and impact tests,microstructure and fracture morphology observation,the microstructure and properties of the heavy plates were studied.The results indicat that the microstructure of the Q345 steel heavy plates consisted of polygon ferrite and large quantity of bainite at the surface,besides ferrite and pearlite in other positions.The yield strength was up to 320 MPa,elon... |
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| Keywords: | Q345 steel wide and heavy plate TMCP technology microstructure mechanical property |
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