Effect of post-coiling transformation on coil collapse of hot-rolled advanced high-strength steel  

作　　者：ZHONG Yong 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China [2]State Key Laboratory of Development and Application Technology of Automotive Steels(Baosteel)Shanghai 201999,China

出　　处：《Baosteel Technical Research》2022年第3期27-34,共8页宝钢技术研究（英文版）

摘　　要：In this paper, the effect of hot-rolling processing parameters on the post-rolling transformation behavior of C-Mn-Cr-Cu weather-resistant martensitic steel was investigated.Results indicate that the post-rolling transformation behavior, particularly the post-coiling transformation behavior, strongly depends on the coiling temperature.Under a high coiling temperature, ferrite/pearlite transformation was mainly observed with a low trans-formation speed and transformation dilation after coiling.With decreasing coiling temperature, the proportion of bainite transformation increased with an increased transformation speed and transformation dilation.The dependence of transformation behavior on the coiling temperature could be one of the most important reasons behind the coil collapse of the experimental steel.The optimization of hot-rolling and coiling processing parameters of the steel strip, including laminar flow cooling, coiling temperature, and suspension time on the winding machine, can signi-ficantly reduce the transformation dilation of the steel after hot rolling, thus effectively controlling the coil collapse of the steel.

关 键 词：AHSS hot rolling COILING phase transformation thermal dilation 

分 类 号：TG335.11[金属学及工艺—金属压力加工]