Gu Chang foundry for you in the development process of ductile iron manhole cover briefly: ductile iron is the 1950s developed a high-strength cast iron materials, its overall performance is close to steel, is based on its excellent performance, has been successfully used to cast a number of complex stress, high strength, toughness, wear resistance requirements of the parts. Ductile iron has been behind the rapid development of gray cast iron, cast iron material is widely used. Gu Chang-year foundry mainly produces ductile iron covers cast iron covers offer, welcome to order! Taigu ductile iron manhole cover in the course will inevitably rust, Taigu Chang in foundry to introduce you to a method for rust: projectile rust: shot blasting machine is to use a high-speed impeller blades rotate, the abrasive dispersion fired ductile iron covers the surface, abrasive cast iron manhole covers flying speed, impact and friction surfaces of manhole covers, ductile iron covers the surface to remove rust and scale, etc., this method of high efficiency, good quality rust, but also make ductile iron manhole covers obtain a certain surface roughness of the film to facilitate adhesion, low labor intensity, dyed lighter hollow of a tree on the environment, production plant should give priority to the use of such methods. Gu Chang-year foundry founded in 2006, is a new modern and dynamic enterprises. Since the construction of the continuous efforts to grow and cast iron manhole covers bearing, is to become a professional production of ductile iron covers business, the annual production capacity of 5,000 tons of cast iron covers standard, is now an annual output of 10,000 tons expansion. I would like to plant good quality, competitive price, on-time delivery for the majority of merchants to provide high-quality service. Cast iron covers quote _ Chang in foundry (certified) _ Jinzhong cast iron covers are provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) is Jinzhong, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang-year leadership in the foundry staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.