Welding aluminum alloy, high strength and light weight. The main welding process is TIG welding TIG, GMAW MIG, FSW FSW, resistance spot welding. Aluminum welding protection measures 1, before welding chemical + mechanically remove the oxide groove and the peripheral portion of the workpiece and the wire surface, Hebei engine recovery order is chemical cleaning, mechanical grinding; 2, the welding process to be used Approved protective gas protection; 3, when welding, motor recovery, using flux, the welding process used constantly prick wire bath surface oxide film. Molten oxide particles formed craters and pores become nuclear goods. In the absence of oxide impurities, pores and micro pores grind it basically disappeared. For aluminum parts production, Henan engine recycling to reduce cyanide impurity foot a particularly important condition. Because they are typically liquid line and ask solidus of a very large amplitude poor, and in a state of porous condensate, it is difficult to provide a supply void. Oxide film casting failure is the formation of highly fragile surface, cast aluminum mechanical properties of unevenness is precisely due to the presence of these oxide film and cause, if not the oxide film. Inhomogeneity will be reduced, the casting will be better than the performance of repetitive forgings, with X-ray examination, these oxide films are usually not visible, but it must be done to prevention rather than repair isochronous later found again. Hubei engine recovered, Shengxin scrap metal recycling (online consultation), the engine from the Linyi City Shengxin Recycling scrap metal Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) Shandong Linyi, leading scrap metal, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Shengxin scrap metal recycling leadership with the staff warmly welcome all inquiries negotiations to create Shengxin scrap metal recycling better future.