Aluminum smelting and casting is the casting of the main link. Strictly control the whole process of melting and casting, to prevent pinholes, inclusions, due to cast, cracks, holes and casting defects such as shrinkage plays an important role. Since the hydrogen-absorbing tendency of large molten aluminum oxide, strong, easily dissolved iron, the engine must be taken simple but sensible precautions in smelting and casting process, in order to obtain high-quality castings. 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, the order is chemical cleaning, diesel engines, after mechanical polishing; 2, the welding process to use qualified The shielding gas protection; 3, when gas welding using flux, the welding process used constantly prick wire bath surface oxide film. Recycling engine computer board _ Sun Shine scrap metal recycling (Online) _ engine recovered from the Linyi City Shengxin 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.