制作U形螺栓时,在油压机上用模具(见示意图)一次将十几件螺栓同时冷压成形。下模用ZGl5材料制成,使用中,下模的两侧R15mm处有擦伤痕迹。为了延长下模的使用寿命,用局部快速增碳的方法,在下模磨损部位增碳处理后,取得了良好效果。 局部快速增碳的方法:用焊炬(焊枪)从下模R15mm处的一端开始到另 U-shaped bolt production, the hydraulic press on the mold (see diagram) at the same time more than a dozen bolts while cold forming. The lower mold is made of ZGl5 material, and the middle and lower molds have scratches marks on both sides of R15mm. In order to extend the service life of the die, with the rapid local carbon method, the lower part of the wear parts of the carbon treatment, and achieved good results. Local rapid carbon method: using a torch (torch) from the lower mold R15mm at one end to another