该齿轮为烧结机构件之一。其外径φ840mm,齿宽250mm。在三个断齿中,两邻齿长度为70mm,另一齿长150mm。该三断齿要求用焊接方法修复。 考虑到42CrMo碳当量高,焊接性差又因此次修复属抢修性质,齿轮未从轴上拆下,且轴两端装有联轴器,为预热工序带来困难,选用以下修复工艺。 The gear is one of the components of the sintering machine. Its outer diameter φ840mm, tooth width 250mm. In three broken teeth, the length of two adjacent teeth is 70 mm and the other tooth length is 150 mm. The three broken teeth require repair by welding. Taking into account the 42CrMo high carbon equivalent, poor weldability and therefore the second repair is a repair property, the gear is not removed from the shaft, and shaft equipped with coupling at both ends, preheating process to bring the difficulty of the following repair process.