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我厂用平鍛机鍛制軸承套圈,所用模具都需在高温(400～600℃)下承受冲击載荷,因此模具材料必須具有較高的耐热性及热疲劳强度,一般都选用5CrNiMo或3Cr2W8等高合金工具钢。我厂由于缺乏这种材料,全套模具都用軸承鋼制造,因而模具的寿命很低,如穿孔冲子和切截半模的寿命只能打2000～3000个套圈,用后就作为廢品处理。为了解决这一問題,我們在电渣冶炼鋼的基础上,試驗了模具的电渣堆焊,即在原来已报廢模具的工作部分堆上一层高合金鋼3Cr2W8,这样既提高了模具的寿命(如穿孔冲子和切截半模堆焊后可打11000～12000个套圈),又能利用廢料,节約原材料。
I plant forging machine forged bearing rings, the mold used in the high temperature (400 ~ 600 ℃) under impact load, the mold material must have high heat resistance and thermal fatigue strength, are generally selected 5CrNiMo or 3Cr2W8 contour alloy tool steel. Due to the lack of such materials in our factory, a full set of molds are made of bearing steel, so the life of the molds is very low. For example, punching punches and cut-off half-molds can only work for 2000-3000 rings for life, . In order to solve this problem, based on the electroslag smelting steel, we tested the electroslag welding of the mold, that is, the working part of the original scrapped mold was piled with a layer of high alloy steel 3Cr2W8, so that the mold Life expectancy (such as piercing punching and cutting half-mold after welding can play 11000 ~ 12000 rings), but also the use of waste, saving raw materials.