Scale Thickness Distribution on SPHC Coil Rolled By CSP Process
CHE Yanmin1，ZHANG Huaming1,2，CHEN Qian1，ZHU Tao3
1.Institute for Structural Materials , Central Iron and Steel Research Institute, Beijing 100081,China; 2.Materials and Metallurgy Institute,Kunming University of Science and Technology, Kunming 650093, Yunnan,China; 3.Technological Center of Masteel, Maanshan 243000 ,Anhui, China
Abstract：The scale thickness distribution on SPHC strip rolled by CSP process is investigated and compared with that by traditional hot rolling mill. The following results are obtained: the scale thickness increases from width center to edge of strip, however the increasing tendency from center to quarter is stronger than that from quarter to edge; the scale on hot coiled strip is thicker than on cooled coil; the scale on bottom side of strip is thicker than on upper side; the relation of scale thickness x with strip thickness h is expressed as: x = 3.95695+2.09607 h and x= 8.152 + 3.132 h for coil produced by CSP and traditional hot rolling mill respectively; the thickness of scale on CSP rolled coil is thinner and less sensitive to strip thickness . Thus the pickling process should be worked out based on the characteristics of scale on strip bottom side.
