山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2015年
1期
13-14
,共2页
X65钢板%边部浪形%边部遮挡%水凸度控制
X65鋼闆%邊部浪形%邊部遮擋%水凸度控製
X65강판%변부랑형%변부차당%수철도공제
X65 steel plate%edge wave%edge masking function%water crown control
针对16 mm厚X65钢板空冷后出现边浪缺陷的情况，分析认为，主要原因是控轧控冷阶段边部与中心温差积累，产生了过冷带，热应力和组织应力不断积累，应力在空冷过程中的释放产生边浪缺陷。通过优化生产工艺，利用MULPIC边部遮挡功能及水凸度控制，减小钢板在控轧控冷过程中的温度梯度，保证钢板横向冷却均匀。改进后，钢板中心与边部温差＜25℃，板形不合格率由46.7%降低为3.5%。
針對16 mm厚X65鋼闆空冷後齣現邊浪缺陷的情況，分析認為，主要原因是控軋控冷階段邊部與中心溫差積纍，產生瞭過冷帶，熱應力和組織應力不斷積纍，應力在空冷過程中的釋放產生邊浪缺陷。通過優化生產工藝，利用MULPIC邊部遮擋功能及水凸度控製，減小鋼闆在控軋控冷過程中的溫度梯度，保證鋼闆橫嚮冷卻均勻。改進後，鋼闆中心與邊部溫差＜25℃，闆形不閤格率由46.7%降低為3.5%。
침대16 mm후X65강판공랭후출현변랑결함적정황，분석인위，주요원인시공알공랭계단변부여중심온차적루，산생료과랭대，열응력화조직응력불단적루，응력재공랭과정중적석방산생변랑결함。통과우화생산공예，이용MULPIC변부차당공능급수철도공제，감소강판재공알공랭과정중적온도제도，보증강판횡향냉각균균。개진후，강판중심여변부온차＜25℃，판형불합격솔유46.7%강저위3.5%。
To the edge wave defects of X65 steel plate with 16mm thickness appeared after air cooling, the main reasons were analysed as follows:the temperature difference between the edge with the center, that was accumulated in the controlled rolling and controlled cooling stage, and produced overcooled region, the thermal and structural stress were accumulated, and the edge wave defects were caused by the stresses released in air cooling process. By optimizing the production process, using MULPIC edge masking function and water crown control, the temperature gradient of the steel plate was reduced during controlled rolling and controlled cooling process, it could guarantee the plate transverse cooling uniform. After the improvement, the temperature difference of plate edge with the center was less 25℃and the shape unqualified rate was reduced to 3.5%from 46.7%.
