25t转炉托圈裂纹的焊修工艺

山东冶金机械厂在对２５ｔ转炉托圈裂纹的焊修中，采用手工电弧焊，焊接顺序为先修轴头再修盖板。焊前钻止裂孔，加拘束连接板，预热；焊接时采取多层多道、分段焊接的方法；焊后分别进行去应力退火和整体回火处理，使焊补焊缝及表面质量达到Ⅱ级。

The Welding Repair Process of Suppot Ring Crack of 25t Converter

The hand electric arc welding is used for welding repair suppot ring crack of 25t converter in shandong metallurgical machinery plant and the welding repair process is first repairing axis head and second repairing cap plate.It must be to drill preventing crack hole,to add connection plate,to do pre-heating before the welding repair;It must be to take multiple layers welding and multistage welding method in time of welding;it must be to do annealing treatment for eliminating strees and whole temper treatment after the welding.The weld and surface quality must be to achieve 2 class level.