| 780MPa级重载汽车用大梁钢的工业试制 |
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| 引用本文： | 王晓南,杜林秀,张海仑,邸洪双.780MPa级重载汽车用大梁钢的工业试制[J].钢铁研究学报,2011,23(5):45-49. |
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| 作者姓名： | 王晓南 杜林秀 张海仑 邸洪双 |
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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,110819 |
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| 基金项目： | 国家科技支撑计划项目(2006BAE03A08) |
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| 摘 要： | 以低碳复合添加微合金元素铌和钛为成分设计思路,综合运用细晶强化、相变强化和析出强化三种强化机制,在国内某厂1750mm半连续热连轧机组进行了780MPa级大梁钢的工业试制.结果表明,终轧温度需控制在780～860℃,卷取温度需控制在450～550℃.大梁钢的显微组织为贝氏体和少量的细晶铁素体,并获得了大量弥散的尺度为1...
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| 关 键 词： | 780MPa级 大梁钢 析出强化 相变强化 |
Industrial Trial of 780 MPa Grade Heavy-Duty Truck Beams Steels |
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| WANG Xiao-nan,DU Lin-xiu,ZHANG Hai-lun,DI Hong-shuang.Industrial Trial of 780 MPa Grade Heavy-Duty Truck Beams Steels[J].Journal of Iron and Steel Research,2011,23(5):45-49. |
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| Authors: | WANG Xiao-nan DU Lin-xiu ZHANG Hai-lun DI Hong-shuang |
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| Affiliation: | WANG Xiao-nan,DU Lin-xiu,ZHANG Hai-lun,DI Hong-shuang(The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,Liaoning,China) |
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| Abstract: | With the component design ideas of low carbon composite added with microalloying elements Nb and Ti, and fine grain strengthening, transformation strengthening and precipitation strengthening were used, the 780MPa grade heavy duty beams steels were carried out on a domestic factory 1750mm semi continuous hot rolling mill. The results show that the finishing temperature to control in range of 780-860℃, and coiling temperature to control in range of 450-550℃. The microstructures of steel are bainite, small amounts of fine grain ferrite, and a lot of dispersed (Nb,Ti)C precipitates with the scale of 10nm and below. The yield and tensile strengths of the steel plate are about 700MPa and 780MPa, respectively. The elongation is 19%. The steel plate have good low temperature impact toughness, cold bending forming and welding performance. |
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| Keywords: | 780 MPa grade truck beam steel precipitation strengthening transformation strengthening |
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