Taigu Chang Foundry share in the production of ductile iron grate rain: rain ductile iron grate as bearings require a higher hardness, often cast iron hardened and tempering process. Process is: all kinds of castings heated to a temperature of 860-900 ℃, the insulation so that primordia whole body after austenitization in oil or molten salt cooled achieve quenching and tempering heat insulation by 250-350 ℃, Qinghai rain grate , primordia body is converted to martensite and residual austenite former spheroidal graphite morphology unchanged. After the casting process has a high hardness and a certain toughness, Qinghai rain grate custom, to retain the lubricating properties of graphite, wear resistance is more improved. Shanxi rain grate install three considerations: First: Before installing rainwater grate, cement foundation must be placed before the rain grate accord. Second: After installing rainwater grate, to install at its fastening screw around Qinghai rain grate size of the sediment at the bottom of the box but also irrigation pulp, prevent rainwater grate off. Third: according to the actual situation, Qinghai rain grate price, installation of any stormwater grate eccentric shape, to the actual requirements. Taigu County in Shanxi Province, Chang Inoue foundry is located in the hometown - gold Taigu treasure. 108 State Road, Taigu, Jinzhong City, Shanxi Province, Hu village Magang industrial park, east of long high-speed, high-speed north Tongyu Qi convenient transportation and accessible. Qinghai rain grate in foundry supply _ Chang (Online) _ Qinghai rain grate on by Taigu Chang foundry. Taigu Chang in foundry (www.sxcnzz.com) is Jinzhong, machining leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Chang in foundry leadership with the staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.