Discussion about the on-line pickling process of titanium and titanium alloy plate
WANG Guo-fu;ZHOU Qing-jun;JIANG Lu-bao;Plate Branch,Baosteel Special Metals Co.,Ltd.;Research Institute,Baoshan Iron and Steel Co.,Ltd.;
In the horizontal continuous spray pickling process,the original equipment and shot blasting + mixed acid(HNO3+HF)pickling process were applied for the pickling of titanium and titanium alloy plate. The surface scale of TA2 plate was easy to remove by the pickling process,and the surface was also easily overly acidic. After pickling,the defects,such as yellow spot and black pockmark defects,appeared on the surface,which caused the high consumption of the mixed acid,influenced the delivery time. According to the defects and problems,taking TA2 titanium and TC4 titanium alloy plate as the representative products,the one-step mixed acid(HNO3+HF)pickling process was introduced,and the surface shot blasting and the surface mixed acid(HNO3+HF)pickling test were conducted. Based on the laboratory and industrialization technological test and research,the equipment in the original horizontal continuous spray pickling process and the technology were optimized. After pickling,the plate surface was silvery and even in color. And the first pickling qualified rate was over 90%.
【CateGory Index】： TG178