| 低焊接裂纹敏感性钢回火组织及力学性能研究 |
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| 引用本文： | 兰亮云,邱春林,赵德文,高秀华,杜林秀.低焊接裂纹敏感性钢回火组织及力学性能研究[J].材料科学与工艺,2011,19(2):42-46. |
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| 作者姓名： | 兰亮云 邱春林 赵德文 高秀华 杜林秀 |
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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;东北大学轧制技术及连轧自动化国家重点实验室;东北大学轧制技术及连轧自动化国家重点实验室;东北大学轧制技术及连轧自动化国家重点实验室;东北大学轧制技术及连轧自动化国家重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50474015);中央高校基本科研业务费资助项目(N100607001) |
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| 摘 要： | 为优高强度低焊接裂纹敏感性钢的力学性能,对其热轧态钢板进行了不同温度的回火实验.通过光学显微镜、扫描电镜和透射电镜观察了回火显微组织的演变特征,并结合相应的力学性能检测手段分析了不同回火温度下显微组织与力学性能的关系.结果表明,550℃回火后屈服强度和抗拉强度较热轧态强度分别提高了115和30 MPa,平均冲击功提高了...
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| 关 键 词： | 低焊接裂纹敏感性钢 回火组织 板条贝氏体 位错 |
Tempering structure evolution and mechanical properties of a low welding crack susceptibility steel |
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| LAN Liang-yun,QIU Chun-lin,ZHAO De-wen,GAO Xiu-hua and DU Lin-xiu.Tempering structure evolution and mechanical properties of a low welding crack susceptibility steel[J].Materials Science and Technology,2011,19(2):42-46. |
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| Authors: | LAN Liang-yun QIU Chun-lin ZHAO De-wen GAO Xiu-hua and DU Lin-xiu |
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| Affiliation: | State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China,;State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China,;State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China,;State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China,;State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China, |
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| Abstract: | To optimize the mechanical properties of a high strength low welding crack susceptibility steel,different temperature tempering tests were carried out on the hot-rolled steel plates in this study.Optical microscopy,scanning electron microscopy and transmission electron microscopy were employed to observe tempering microstructure evolution,and the relationship of tempering microstructures and corresponding mechanical properties was analyzed according to the results of mechanical properties tests.The results shows that the yield strength and tensile strength of 550 ℃ tempered specimens are increased by 115 MPa and 30 MPa,and the average impact absorbed energy is enhanced by 30 J compared with that of the hot rolled specimens.Microstructure analyses present that the specimens maintain relatively good boundary strengthening and dislocation strengthening effects.Meanwhile,that quite a number of fine precipitates disperse on dislocation lines is also an important factor to improve the strength.However,under the condition of 650 ℃ tempering,a new kind of martensite phase occurs along the boundary of prior austenite and degenerated boundary of lath bainite,and results in deterioration of toughness. |
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| Keywords: | low welding crack susceptibility steel tempering structure lath bainite dislocation |
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