| 低成本钛微合金化Q345B钢组织性能的研究 |
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| 引用本文： | 罗许,杨财水,康永林,李俊洪.低成本钛微合金化Q345B钢组织性能的研究[J].轧钢,2015,32(5):8-12. |
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| 作者姓名： | 罗许 杨财水 康永林 李俊洪 |
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| 作者单位： | 1.北京科技大学材料科学与工程学院，北京100083 ; 2.攀钢集团研究院有限公司，四川攀枝花 617000 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助项目;“十二五”国家科技支撑计划资助项目 |
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| 摘 要： | 通过采用低锰(w(Mn)=0.6%~0.8%)钛微合金化(w(Ti)=0.045%~0.060%)的成分体系以及控轧控冷工艺,成功试制出低成本钛微合金化Q345B带钢。结果表明:不同厚度规格带钢的屈服强度为413~468 MPa,抗拉强度为571~595 MPa,伸长率为25.3%~27.9%,常温冲击功为105~134J,冷弯性能合格,均满足国标要求。Ti的析出物有尺寸大小为50~100nm的方形TiN粒子和尺寸小于10nm的球形纳米TiC粒子,充分发挥了Ti的细晶强化和沉淀强化效果。
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| 关 键 词： | 关键词：钛微合金化 Q345B钢 力学性能 微观组织 析出 |
| 收稿时间： | 2014-09-09 |
Study on the microstructure and mechanical properties of low cost titanium micro- alloyed Q345B steel |
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| LUO Xu,YANG Cai- shui,KANG Yong- lin,LI Jun- hong.Study on the microstructure and mechanical properties of low cost titanium micro- alloyed Q345B steel[J].Steel Rolling,2015,32(5):8-12. |
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| Authors: | LUO Xu YANG Cai- shui KANG Yong- lin LI Jun- hong |
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| Affiliation: | （1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China ;2. Panzhihua Iron & Steel Research Institute, Panzhihua 617000, China） |
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| Abstract: | By using low manganese content (w(Mn)=0.6%-0.8%)and Ti micro- alloyed (w(Ti)=0.045%-0.060%)component system and TMCP process, low cost Ti micro- alloyed Q345B strip was developed successfully. The results indicate that the yield strength of the tested strips with different thickness is 413-468 MPa, the tensile strength is 571-595 MPa, the elongation is 25.3%-27.9%, the impact energy at room temperature is 105-134 J, the cold bending property is qualified, and all the properties meet the GB requirements. The precipitates of Ti include square TiN particles with 50-100 nm and nano- spherical TiC particles with less than 10 nm, and it gives full play to the effect of fine grain strengthen and precipitation strengthen of titanium. |
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| Keywords: | Key words: Ti microalloyed Q345B Steel mechanical properties microstructure precipitation |
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