Cause Analysis and Control of Contusion Black Specks Defect on Hot Rolled Strip
For the problem of the contusion black specks on the surface of hot rolled strip steel severely affecting the subsequent pickling quality,the process parameters of the influencing factors in each procedure of the entire process flow are analyzed on the basis of the theory for the formation mechanism and evolution law of the contusion black specks at the hot rolling procedure.Meanwhile,taking the flat coil or loose coil improvement as the target and breakthrough point,the procedure at which the contusion defect forms is focused on,and the key factors leading to the contusion black specks are determined,so that the problem of the contusion black specks on hot rolled strip steel surface is resolved comprehensively from the perspective of the entire process flow,and the product degradation rate due to the contusion black specks occurred in the entire process flow is reduced.
万方数据
维普
