Surface Quality Control for Hot Rolling SAE4137 Bar Based on Processing Map Method
LI You-he1, HAO Zhen-yu2, ZHANG Long2, HUANG Zhen-yi2, CAO Yan2, ZHANG Xiao-feng2
1. Bar Plant of Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China 2. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, Anhui, China
Abstract：Isothermal compression experiments of SAE4137 steel were performed on an MMS-200 thermal-mechanical simulator at the strain rate ranging from 0.1 to 10 s-1, the deformation temperature ranging from 900 to 1 150 ℃ and the maximum height reduction of 70%. On the basis of the experimental results, dynamic material model and Murthy flow instability criterion, the processing maps for SAE4137 steel were constructed at the different true strains. The stable regions, flow instability regions and the recommended processing region were obtained for SAE4137 steel. Based on the analysis of microstructure and the practical condition of making intermediate billet (215 mm×235 mm) into [?]150 mm large bar through 4-pass finishing rolling in Nanjing Steel, the surface defect and its position of SAE4137 bar in production process were predicted.
李佑河， 郝震宇， 张 龙， 黄贞益， 曹 燕， 章晓峰. 基于热加工图法的热轧SAE4137棒材表面质量控制[J]. 钢铁, 2014, 49(10): 44-50.
LI You-he, HAO Zhen-yu, ZHANG Long, HUANG Zhen-yi, CAO Yan, ZHANG Xiao-feng. Surface Quality Control for Hot Rolling SAE4137 Bar Based on Processing Map Method. Iron and Steel, 2014, 49(10): 44-50.
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2014, Vol. 49 
