论文部分内容阅读
凹模在工作过程中,由于磨损使工作间隙加大,以致报废。为了延长模具使用寿命,节约优质钢材,我们采用了下述方法可使磨损的凹模复活。首先把磨损的凹模加热到低于相变点(A_(C1))以下30～50℃的温度保温一定时间(箱式电炉以2分钟/毫米计算)后,立即在硝盐或水中冷却。由于热应力的作用,使模口尺寸缩小。这样反复几次即可达到要求。淬火前应进行退火,以消除应力,防止淬火开裂。
Die in the work process, due to wear and tear so that the working gap increases, resulting in scrapped. In order to extend the life of the mold, saving high-quality steel, we use the following methods can make the wear of the die revival. First, the worn die is heated to a temperature below 30 ~ 50 ℃ below the transformation point (A_ (C1)) for a certain period of time (2 minutes per millimeter in a box furnace) and then cooled in salt water or water immediately. Due to the role of thermal stress, the die size reduced. This repeated several times to meet the requirements. Quenching should be carried out before quenching to eliminate stress and prevent quench cracking.