【作者】 郭佳； 刘杰； 周娜； 姚志强； 代晓莉； 李飞； 王全礼；

【Author】 GUO Jia LIU Jie YAO Zhi-qiang DAI Xiao-li DU Yu LI Fei WANG Quan-li (Shougang research institute of technology,Yangzhuang street 69 Shijingshan district,Beijing 100043,China)

【机构】 首钢技术研究院；

【摘要】 采用550小轧机进行了实验室轧制实验,通过改变冷却工艺改变双相钢显微组织中铁素体和马氏体形貌和分布,研究了铁素体和马氏体形貌和分布对钢力学行为的影响。实验结果表明,当组织中的铁素体由多边形铁素体部分转变为针状铁素体时,马氏体的尺寸变小且分布更为均匀。此时,钢的屈服强度和抗拉强度明显提高,延伸率略有下降,冲击性能明显提高。更多还原

【Abstract】 The ingots were rolled by 550 mill in laboratory and the different shape and distribution of ferrite and matensite was obtained by changing the cooling process.The influence of the shape and distribution of ferrite and matensite on mechanical properties of dual phase steel was investigated.The results indicated that,the size of matensite is finer and the distribution of matensite is more homogeneous in steel with the microstructure was mixed by polygonal ferrite、accicular ferrite and martensite than that of steel with the microstructure mixed by polygonal ferrite and martensite.Moreover,the values of yield strength、tensile strength and impact toughness increases apparently,the value of elongation decrease.更多还原