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利用“锻件内部裂纹在高温下有修复”的现象及规律,提出通过旋转进砧法形成的高度不大于上平砧圆弧1/3、人为地留下台阶,在高温下将坯料翻转180°后,使用排砧法从中间向边缘排压,而且每个角度都进行旋转排压,将可能存在于中心的夹杂物尽量向圆周方向打破、撕散。虽然排压法中间局部的压下量比较大,但由于坯料是翻过来进行的,因而能有效地消除RST效应。此方法可以提高管板类锻件的成品率,改善产品内在质量,提高经济效益。
Using “forging internal cracks in the repair of high temperatures, ” and the law proposed by rotating into the anvil method is not more than the height of the anvil arc is not more than 1/3, artificial left behind the step, the blank at high temperature flip 180 °, the use of row anvil method from the middle row to the edge of pressure, but also for each angle of the rotary pressure, the possible inclusions in the center as far as possible to break the circumferential direction, torn apart. Although the partial pressure reduction method in the middle of a large reduction, but because the billet is turned over, which can effectively eliminate the RST effect. This method can improve the yield of the tube plate forgings, improve the intrinsic quality of the products and increase the economic benefits.