Deformation of oxide scale on steel surface during hot rolling

被引：38

作者：

Utsunomiya, Hiroshi ^{[1
]}

Doi, Shoichi ^{[1
]}

Hara, Ken-ichiro ^{[1
]}

Sakai, Tetsuo ^{[1
]}

Yanagi, Shusuke ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan

[2] Kobe Steel Ltd, Mat Res Lab, Nishi Ku, Kobe, Hyogo 6512271, Japan

来源：

CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2009年 / 58卷 / 01期

关键词：

Rolling; Steel; Surface; Friction; BEHAVIOR;

D O I：

10.1016/j.cirp.2009.03.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Although oxide scale has significant influence on surface quality of hot-worked products, deformation of the scale during hot working has not been understood sufficiently. The authors propose an experimental technique to observe the scale as hot-worked using glass coating, in this study. Immediately after hot rolling at 1273 K, glass powder was sprinkled over a mild steel sheet. The glass coating suppresses further oxidation and separation of the scale from the steel. Scanning electron microscopy revealed that the scale deforms uniformly if the reduction is small (r < 20%). If the reduction is high (r > 30%), steel is extruded through cracks in the scale to the outermost surfaces. The friction between the rolls and the sheet decreases with increasing scale thickness when the scale does not deform uniformly. (C) 2009 CIRP.

引用

页码：271 / 274

页数：4

共 12 条

[1]

ELKALAY AKE, 1968, J IRON STEEL I, V206, P152

[2]

Kaya A., 1999, Mitsubishi Heavy Ind. Tech. Rev., V36, P300

[3] Analysis of secondary oxide-scale failure at entry into the roll gap [J].