Welding difficulty (1) easily oxidized. In the air, easy to fit with aluminum oxide used battery recycling, generating a dense aluminum oxide film (thickness of about 0.1-0.2μm), high melting point (about 2050 ℃), far more than the melting point of aluminum and aluminum alloys (about 600 ℃ or so). Alumina density 3.95-4.10g / cm3, aluminum is approximately 1.4 times the surface of the aluminum oxide film of easy absorption of moisture, welding, it prevents fusion of the base metal, easy to form pores, slag, No fusion defects, performance degradation caused by welding. (2) easy to produce pores. The main reason porosity of aluminum and aluminum welding is hydrogen, since large amounts of hydrogen soluble liquid aluminum, and solid aluminum hardly dissolves hydrogen battery collection points, so when bath temperature rapid cooling and solidification, hydrogen too late to escape, easily aggregated to form pores in the weld. Hydrogen is difficult to completely avoid the holes, many sources of hydrogen, electric arc atmosphere of hydrogen, aluminum, wire surface oxide film adsorbed moisture in the air and so on. Practice has proved that, even if the argon gas by GB / T4842 standard requirements of the new battery recycling, purity of 99.99%, but the moisture content reaches 20ppm, there will be a lot of dense pores, when the relative humidity exceeds 80%, if heating and other measures are not taken, the weld will obviously appear pores. At the same time, using a small welding current slow increase weld cooling time, and use wire arcs puddle agitation, can better help the gas discharge bath. Transient surface of the molten aluminum to form a very stable oxide. With the speed of the oxidation temperature and the presence of certain alloying elements (such as magnesium and beryllium) increases. If the surface of the molten aluminum while not being in interference, then the oxide film formed on the surface is self-limiting, and any turbulence will mix the oxide film to melt most, and produces a fresh surface to facilitate more oxide is formed. The resulting oxide film and oxide impurities are very detrimental to the performance of cast aluminum parts, however, the alloy smelting, transport or pouring the molten metal and the mold is filled with the process will cause turbulence. Battery recycling, Shengxin scrap metal recycling (online consultation), battery recycling recycling scrap metal from the Linyi City Shengxin 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.