Heat galvanized fence: As the wall thickness of the casting uneven spray galvanized fence manufacturers in the heating hot dip galvanized fence quotes, cooling and phase change process, will produce the equivalent stress and organizational stress. Also after the machining of large parts of its interior is also easy to residual stress, all of which stress must be eliminated. Stress relief annealing heating temperature is generally 500 ~ 550 ℃ holding time of 2 ~ 8h, and then furnace cooling, using this technology can eliminate 90 to 95% by casting stresses, but cast iron does not occur. If the temperature exceeds 550 ℃ or the holding time is too long, it will lead to graphite, the casting strength and hardness decreased. When casting cooling, surface and thin at the hot-dip galvanizing spray fence section prices, tend to produce white. White tissue hard and brittle, poor processing performance, easy to peel off. Therefore must annealing method to eliminate white tissue. During the high-temperature insulation, high travel and cementite eutectic cementite decomposition of graphite, in the subsequent cooling process in nursing and secondary cementite eutectoid cementite decomposition also occurs graphitization process. Due to the decomposition of cementite, resulting in decrease in hardness hot dip galvanized fence, thereby improving machinability. Product Description: The traditional fence because in beautiful, durable, corrosion and other aspects, there are many problems and gradually be eliminated. The new hot-dip galvanizing because of electrostatic spraying fence elegant styling, beautiful appearance, excellent corrosion resistance, quick and easy installation is increasingly being accepted by the market. Hot dipped zinc coating layer analysis: play galvanic protection, from the inside to the outside to prevent rusting steel substrate. Zinc-phosphate coating: to enhance the adhesion of the coating and the substrate. Organic zinc epoxy powder coating: excellent corrosion resistance and anti-impact performance. Pure polyester powder coating color: UV stability, long anti-dirty performance and surface self-cleaning properties. Anqiu hot dip galvanized fence | hot dip galvanized fence | St. Ye Ye metal provided by Linqu St. Metal Products. Linqu St. Ye Metal Products (www.shengyehl.com) strong, credible, Shandong Weifang metal building materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the holy Ye metal and you hand into the brilliant, for a better future!