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Effect of Nb on Microstructure and Mechanical Property of High Strength Hot-Rolled Dual Phase Steel

机译：铌对高强度热轧双相钢组织和力学性能的影响

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In according with the transformation rules of C-Si-Mn-Cr-Mo and C-Si-Mn-Cr-Mo-Nb tested steels,thermal mechanical experiment and rolling experiment of tested steels were carried out in lab.The effects of Nb on microstructure and property of high strength hot rolled dual phase steels were analyzed.It is shown that Nb retards ferrite transformation,reduces ferrite volume fraction and refines the ferrite grain size and martensite colony size.After micro-alloying of 0.047wt％Nb,yield strength and tensile strength increase by 145MPa and 135MPa respectively under medium temperature coiling process.YS/TS ratio increases from 0.51 to 0.62,meanwhile,elongation reduces from 24.8％ to 23.6％,and the decrease of elongation is not obvious.That is to say,the grain refining strengthening and precipitation strengthening of Nb micro-alloying is effective to enhance the strength grade of hot rolled DP steel coiled at medium temperature.

机译：根据C-Si-Mn-Cr-Mo和C-Si-Mn-Cr-Mo-Nb试验钢的转变规律，在实验室进行了试验钢的热力学实验和轧制实验。对高强度热轧双相钢的组织和性能进行了分析。结果表明，Nb延缓了铁素体的转变，降低了铁素体的体积分数，细化了铁素体的晶粒尺寸和马氏体集落尺寸。微合金化0.047wt％Nb后，屈服在中温卷取过程中，强度和抗拉强度分别提高了145MPa和135MPa。YS/ TS比从0.51增加到0.62，同时，伸长率从24.8％降低到23.6％，伸长率的降低并不明显。 Nb微合金的晶粒细化强化和析出强化有效地提高了中温卷取的热轧DP钢的强度等级。

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来源
《Asia steel international conference》|2012年|1-4|共4页
会议地点 Beijing(CN)
作者
ZHOU Leyu; LIU Yazheng; ZHANG Dan; SONG Renbo;
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作者单位

Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China;

Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China;

Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China;

Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China;

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原文格式 PDF
正文语种 eng
中图分类钢铁冶炼（黑色金属冶炼）（总论）;
关键词
Nb micro-alloying; hot-rolled DP steel; microstructure evolution; mechanical property;

机译：铌微合金化；热轧双相钢；组织演变；力学性能;

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Effect of Nb on Microstructure and Mechanical Property of High Strength Hot-Rolled Dual Phase Steel

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