（1. Sheet Metal Research Institute, Shougang Research Institute of Technology, Beijing 100043, China 2. Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing 100043, China）
Abstract：The formation mechanism of surface defects, including the independent linear defect, independent tarpaulin defect, the mixture of linear and tarpaulin defect, and the shallow pit defect on the hot rolled SPA- H coil in Shougang Company was studied. The morphologies of defects and microstructures were examined using metallographic microscope, scanning electron microscope and energy dispersive spectrometer. It was concluded that the formation of both linear and tarpaulin defects and their mixture should be closely related to the two factors: Oxide scale that contains both silicon oxide and chromium oxide; The copper enrichment in the oxide scale near the steel matrix. The shallow pit results from the debris of broken tarpaulin which was rolled into the steel during the finish rolling.
收稿日期: 2017-07-17
出版日期: 2018-03-13
通讯作者:
邵肖静
E-mail: shaoxiaojing@shougang.com.cn
引用本文:
邵肖静 季晨曦 高小丽 刘锟 任群 崔阳. SPA- H钢热轧卷表面缺陷成因分析[J]. 中国冶金, 2018, 28(2): 28-33.
SHAO Xiao- jing ,,JI Chen- xi,GAO Xiao- li,LIU Kun,REN Qun,CUI Yang. Mechanisms on formation of different kinds of surface defects in hot- rolled SPA- H steel[J]. China Metallurgy, 2018, 28(2): 28-33.
2018, Vol. 28 
