Thermal Scratch on Surface of SUS430 Stainless Steel Strip in Cold Rolling Process  

作　　者：Chang-sheng LI Jin-shan CHEN Wen-long HAN You-yuan LI Bo FU 

机构地区：[1]State Key Laboratory of Rolling and Automation,Northeastern University [2]Baosteel Stainless Steel Co.,Ltd.

出　　处：《Journal of Iron and Steel Research International》2014年第3期282-286,共5页

基　　金：Sponsored by National Natural Science Foundation of China(51174057,51274062);National High-technology Researchand Development Program of China(2012AA03A503)

摘　　要：The thermal scratch significantly influences the surface quality of the stainless steel in cold strip rolling. The thermal scratch has a close relation to the rolling parameters, the rolls surface and the emulsions used in rolling. In order to explain the thermal scratch on the strip surface, the cold roiling process of SUS430 stainless steel strip was investigated in the laboratory. The thermal scratch defect occurs frequently in the second rolling pass （maximum reduction in height is 32.3 ~）, especially on the lower surface of strips. When concentration and temperature of the emulsion are the same, the thermal scratch on the surface o{ the strip is aggravated with increasing the roll surface roughness. With the same roll surface roughness and emulsion concentration, the thermal scratch is obviously more severe at an emulsion temperature of 63 ℃ than 55 ℃. With the same roll surface roughness and emulsion tempera- ture, the thermal scratch is distinctly weaker at the emulsion concentration of 6 % than that of 3 %.The thermal scratch significantly influences the surface quality of the stainless steel in cold strip rolling. The thermal scratch has a close relation to the rolling parameters, the rolls surface and the emulsions used in rolling. In order to explain the thermal scratch on the strip surface, the cold roiling process of SUS430 stainless steel strip was investigated in the laboratory. The thermal scratch defect occurs frequently in the second rolling pass （maximum reduction in height is 32.3 ~）, especially on the lower surface of strips. When concentration and temperature of the emulsion are the same, the thermal scratch on the surface o{ the strip is aggravated with increasing the roll surface roughness. With the same roll surface roughness and emulsion concentration, the thermal scratch is obviously more severe at an emulsion temperature of 63 ℃ than 55 ℃. With the same roll surface roughness and emulsion tempera- ture, the thermal scratch is distinctly weaker at the emulsion concentration of 6 % than that of 3 %.

关 键 词：stainless steel thermal scratch EMULSION roll surface roughness 

分 类 号：TG335.12[金属学及工艺—金属压力加工] TF777[冶金工程—钢铁冶金]