Bucket tooth surfacing welding process

(1) as the hardness of bucket teeth is higher than that of the main cutter disc, electrode 1102 is directly used for surfacing welding. Although the hardness can meet the requirements, the weldability is poor.Because the linear expansion coefficients of the two materials are different, the surfacing layer is easy to peel off.Therefore, it is necessary to add a transition layer.The transition layer was surfacing with 4102 quasi-4mm electrode, and 1102 was used as the covering layer.The total thickness of the two layers is 5-6mm, accounting for about 1/2 of each layer. The surface hardness is greater than hrc60.

(2) to prevent deformation of bucket teeth, four bucket teeth should be surfacing at the same time.Short pass welding shall be performed in order to reduce heat accumulation to.

(3) wear resistant surfacing welding can not only be used for the protection of new bucket teeth, but also for the repair of old bucket teeth.When the old bucket tooth is repaired, the worn part should be filled with ordinary welding materials first, and then a layer of wear-resistant materials should be surfacing welded by the above surfacing technology.