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МЛ10合金铸件,由于强度高,在航空制造业中得到了广泛地应用。这种铸件的气孔、夹渣等缺陷的修复都是采用钨极氩弧焊,以3～5毫米厚的光滑铜板或石棉布作衬垫。补焊前清理缺陷,铸件不预热或者在炉中预热420～430℃,保温3～4小时的情况下补焊,焊后缓冷。不预热补焊对焊根或凹陷区热裂纹的形成影响不大。本文研究了采用三相电弧补焊МЛ10合金复杂铸件,在不整体预热的情况下,各种工艺衬垫对焊根金属成形的影响。试验是在批量生产的废件上进行的,补焊了面积达450毫米~2的带
МЛ10 alloy castings, due to its high strength, are widely used in the aviation industry. This casting porosity, slag and other defects are repaired by TIG welding to 3 to 5 mm thick smooth copper or asbestos lining. Repair defects before welding, castings are not preheated or preheated in the furnace 420 ~ 430 ℃, heat 3 to 4 hours under the circumstances of welding, slow cooling after welding. Not preheat repair welding root or depression hot zone formation is not affected. In this paper, the effects of various process gaskets on metal forming of welded root by using three-phase arc welding МЛ10 alloy complex castings were studied without preheating. The test was carried out on mass-produced scrap, with the area of 450 mm2 being repaired