casting girth gears manufactured by CHAENG

Large steel casting manufacturers have strict product quality requirements for steel castings, and the quality of large steel castings products mainly includes appearance quality, internal quality and use quality. The appearance quality of the product refers to the surface roughness, surface defects, dimensional deviation and shape deviation and weight deviation; The intrinsic quality refers to the chemical composition, physical properties and its own mechanical properties, internal holes, cracks, inclusions and segregation; The quality of use is the durability in different use environments, such as wear resistance, corrosion resistance, fatigue resistance, cutting line and weldability and other process properties.

Common factors affecting the quality of large steel castings are: first of all, the design process, the technician determines its shape and size according to its working conditions and metal material properties during design, and also considers the rationality of the design from the characteristics of the casting process to avoid defects. The second is casting manufacturability, according to the structure, weight, size, and required conditions of the casting to select the appropriate modeling and core making method, to set the casting rib or cold iron, riser, pouring system, etc.. It is necessary to strictly control the quality of raw materials used in casting, if the quality is not up to standard, it is easy to cause defects such as pores, pinholes, slag inclusions and sticky sand in steel castings; Finally, the process operation, large steel casting manufacturers in the processing of the process to develop a good process operation procedures, improve the technical level of workers, so that the process is normally implemented.