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我厂在蒸汽铁路起重机检修过程中,有许多G5钢轴磨耗后需要堆焊修补.过去长期以来,是采用沿着轴长度方向分段手工堆焊.为了避免焊后裂缝,焊前必须将轴予热至300～400℃,焊后放在石棉灰中保温,使其缓冷.这样就增加了大量的辅助工时和燃料消耗,同时工作地面积亦占用很多.由于纵向手工堆焊是先从一侧开始的,所以焊后往往产生弯曲变形,长轴尤为显著.为避免车削后出现“黑皮”,必须加厚
I plant in the steam railway crane maintenance process, there are many G5 steel shaft wear after welding repair needs over the long term, is the use of sub-manual along the length of the shaft along the length of the weld crack.In order to avoid post-weld cracks, the shaft must be welded before Preheat to 300 ~ 400 ℃, after welding on asbestos in the insulation, so slow cooling. This will increase the number of auxiliary man-hours and fuel consumption, while the work area also takes up a lot. The beginning of the side, so after welding tend to have bending deformation, the long axis is particularly significant .To avoid turning “black”, you must thicken