When using steel, steel shall conform to the technical requirements of GB / T 699-1999 and GB / T 700-2006 of the relevant provisions. When using steel castings, its chemical composition, mechanical properties after heat treatment and mechanical properties after heat treatment and impact toughness to meet the requirements, while steel castings shall meet the following requirements; steel castings machined ball joints after damping bearing applications, casting defects present on the surface and there are not allowed to use the presence and use of the premiere performance of a fixed vibration ball bearing hinge, allowing repair, once more than the specified defects and cracks appeared not allow the presence of steel castings shall not be used and repair. Before welding of steel castings, clearly showing the defect treatment should be good metal far and away the 30mm range bevel edge and bevel surface clean, honest to which the casting surface grinding to meet the quality requirements of the damping ball hinged seat, and shall have not welding. Cracks, slag porosity and other defects, pots and bottom welded ring up does not affect its mechanical properties. Steel castings to be cast in accordance with regulations ultrasound visits and should reach the requirements damping steel ball bearing hinges offer, internal cracks are not allowed. Brass ring is the raw material used in ball bearing hinges, bearings Uno General brass, its mechanical properties and chemical composition of indicators should be specified. Is the use of organic solvent degreasing solvent dissolution of grease and oil in a clear way, applies only to a mild case of oil, commonly used in gasoline, acetone, benzene and other solvents, solvent toxicity, is not very easy to catch fire and degreasing clean. Rust on ferrous metal rust rust usually manual, mechanical descaling, rust and chemical rust spray and other methods, but manual, mechanical and jet blasting the general effect is not ideal, as is in addition to the larger object when it is difficult to clean, chemical rust oxides and acid solution using embroidery chemical reaction, will dissolve the surface rust. Stripping in order to achieve the purpose of rust, collectively referred to as pickling rust, great durability, good or bad influence on surface rust coating, rust coating durable quality of life can make a difference based on a large number of experiments show abroad more than four times the forest processing and anodic oxidation treatment, basic surface after degreasing and rust, generally can not immediately painting, in order to prevent re-rusting and improve the adhesion of the coating, often using the method of oxidation of certain phosphate chemical treatment, such that the basic surface to form a protective film. Hao-company production, fixed damping hinge ball bearings, ball joints bearing damping provided by Hao-engineering rubber. Search for "grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing" fly suppliers, network operators choose to have a full alliance Certified: Engineering Rubber Co., Ltd. Hengshui HaoTong (www.htgcxj.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!