我厂400轧钢机齿轮轴,因中、下轴的梅花头之间卡进一铁块,使下轴由轴颈处完全折断,折断处距轴端约300毫米。为此采用热装与堆焊相结合的方法进行了修复,至今已正常运行五年之久。该轴材质为40Cr铸钢,轴径280毫米。焊前准备将齿轮轴断裂处加工成长150毫米、直径100毫米的基孔制轴。切一段长450毫米、直径 I plant 400 rolling mill gear shaft, due to the middle and lower shaft of the plum head between a card into a card so that the lower shaft completely broken by the journal, broken away from the shaft end of about 300 mm. To this end, the method of combining heat and surfacing was used for repair, and up to now, it has been operating normally for five years. The shaft material 40Cr cast steel, shaft diameter 280 mm. Welding before the preparation of the broken gear shaft processing growth of 150 mm, 100 mm diameter base hole shaft. Cut a length of 450 mm in diameter