| 正火温度对低碳微合金钢Z向性能的影响 |
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| 引用本文： | 唐帅,刘振宇,王国栋,刘相华.正火温度对低碳微合金钢Z向性能的影响[J].金属热处理,2009,34(7). |
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| 作者姓名： | 唐帅 刘振宇 王国栋 刘相华 |
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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,辽宁,沈阳,110004 |
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| 基金项目： | 国家"十一五"支撑计划项目，国家"863"计划项目 |
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| 摘 要： | 通过显微组织观察和力学性能测定,研究了正火温度对低碳铌钒微合金钢Z向性能的影响.结果表明,正火不能消除MnS夹杂;850～925℃正火后,可以改善钢板的带状组织,减轻应力集中,降低裂纹萌生倾向,组织细化可有效阻碍裂纹扩展,提高钢板的Z向性能;950℃正火后,晶粒粗化且存在带状组织,抗裂纹扩展能力降低,从而使其Z向性能急剧恶化.采用875℃正火可以保证低碳铌钒微合金钢具有最佳的强韧性和Z向性能匹配.
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| 关 键 词： | 正火 低碳微合金钢 Z向性能 层状撕裂 |
Effect of normalization temperature on Z-direction property of low carbon microalloyed steel |
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| TANG Shuai,LIU Zhen-yu,WANG Guo-dong,LIU Xiang-hua.Effect of normalization temperature on Z-direction property of low carbon microalloyed steel[J].Heat Treatment of Metals,2009,34(7). |
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| Authors: | TANG Shuai LIU Zhen-yu WANG Guo-dong LIU Xiang-hua |
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| Affiliation: | State Key Laboratory of Rolling Technology & Automation;Northeastern University;Shenyang Liaoning 110004;China |
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| Abstract: | Effects of normalization temperature on Z-direction properties of low carbon microalloyed steel bearing Nb and V were investigated with observation of the microstructure and test of mechanical properties.The results show that MnS inclusions still exist in steel after normalization.Through normalizing from 850℃ to 925℃,the banded structures can be improved,which reduces stress concentration and decreases the crack initiation trend.The microstructure is refined,which prevents effectively the cracking from propagation so as to improve Z-direction property.The grains are coarsened and the banded structures appear after normalization at 950℃,which decreases the resistance to crack propagation so that the Z-direction property is deteriorated.To adopt 875℃ normalization can assure the optimum match of strength,toughness and the Z-direction properties of the steel. |
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| Keywords: | normalization low carbon microalloyed steel Z-direction property lamellar tearing |
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