Extrusion temperature is too high. (See analysis of technological aspects of) the quality and composition 5. Process 1 / rod casting rod aspects prone to internal defects in the (difficult deformation zone) weld hollow sections. Mg, Si, and high total Fe content is too high will exacerbate bad welding, it is recommended Mg, Si 0.7% of the total in the range of -0.9%, Fe content of less than 0.15% of available good quality welds. Squeeze tube temperature will also affect the quality of the weld unreasonable choice, for the thick-walled tube extrusion temperature profiles proposal 440-460 ℃ aluminum cover panel of professional manufacturers, and for thin-walled sections and split down the hole too large professional production aluminum cover panel manufacturers, suggested the use of 400-420 ℃, on the other hand, Shandong aluminum cover panel prices, squeeze tube is not clean, I accumulated more oxide, or squeeze tube is deformed as a drum, and squeeze and squeeze tube pad gap is too large, they all affect weld quality. Specializing in the production of aluminum cover panel manufacturers _ _ cis Alcoa aluminum cover panel provided by the Aluminum Co., Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) strong, credible, in Jinan, Shandong aluminum products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rolls in aluminum and you hand into the brilliant, for a better future!