热轧带钢还原冷轧后的表面及横截面形貌
Surface and Cross-Section Morphology of Hot Rolling Strip Steel after Reduction and Cold Rolling
摘 要
对Q215热轧带钢试样进行还原处理后, 利用四辊轧机对其进行五道次冷轧试验, 采用扫描电镜对还原后及不同道次冷轧后试样的表面和横截面形貌进行了观察。结果表明: 还原后热轧带钢表面出现的裂纹、气泡和气孔等缺陷在冷轧过程中得到有效消除, 裂纹宽度减小并趋于闭合, 但五道次冷轧后, 带钢表面仍然残留裂纹痕迹, 且裂纹间距增大;带钢表面脱碳层厚度逐道次减小, 试样表面形貌得到改善, 表面质量不断提高。
冷轧
氧化铁皮
表面形貌
脱碳层
reduction
cold rolling
iron oxide scale
surface morphology
decarburized layer
Abstract
Hot rolling strip steel Q215 steel after being treated by reduction was rolled by cold rolling of five passes using a four-high rolling mill. The morphology of surface and cross-section of samples after reduction and different passes of cold rolling was observed using scanning electron microscopy. The results show that the defects such as cracks, bubbles and pores on the surface of test steel after reduction were eliminated in the following cold rolling. The cracks gradually decreased in width and were nearly close, but there were some traces of cracks on the surface of test steel after five passes of cold rolling and the space between cracks increased. The thickness of decarburized layer decreased with the increase of rolling pass. Surface morphology improved and surface quality enhanced constantly.
中图分类号 TG335.56
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51174250)
收稿日期 2013/9/22
修改稿日期 2014/10/1
网络出版日期
作者单位点击查看
备注井玉安(1967-), 男,辽宁鞍山人, 教授, 博士。
引用该论文: JING Yu-an,HU Xi-da,ZANG Xiao-ming,QIN Yi,LI Chun-fu. Surface and Cross-Section Morphology of Hot Rolling Strip Steel after Reduction and Cold Rolling[J]. Materials for mechancial engineering, 2014, 38(12): 60～64
井玉安,胡希达,臧晓明,覃毅,李春福. 热轧带钢还原冷轧后的表面及横截面形貌[J]. 机械工程材料, 2014, 38(12): 60～64
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参考文献
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【3】SAMWAYS N L. Strong competitor with traditional pickling process-hydrogen reduction scale removal process［J］.World Iron& Steel,2002(2):47-51.
【4】PRIMAVERA A, CATTARINO S, PAVLICEVIC M.Influence of process parameters on scale reduction with H2［J］.Ironmaking and Steelmaking, 2007, 34(4):290-296.
【5】石杰,王德仁,何业东,等.用CO还原BRC3热轧带钢表面氧化铁皮的研究［J］.钢铁,2008(5):89-93.
【6】SHI Jie, WANG De-ren, HE Ye-dong, et al. Reduction of oxide scale on hot-rolled strip steels by carbon monoxide［J］.Materials Letters,2008,62(20):3500-3502.
【7】于云蛟,李胜利,井玉安,等.氢气还原对热轧带钢表面形貌的影响［J］.轧钢,2012,29(5):18-21.
【8】井玉安,于云蛟,李胜利.氮氢混合气氛下带钢表面氧化铁皮的还原［J］.热加工工艺,2013,42(18):45-48.
【9】马正伟,刘炳.冷轧钢板表面缺陷的形成原因［J］.机械工程材料,2009,33(11):90-92.
【10】董双鹏,宋进英,陈业熊,等.冷轧钢板表面缺陷的种类及形成原因［J］.机械工程材料,2012,36(7):100-104.
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