Cast parts refer to products produced by casting process. The so-called casting is a production method in which the liquid metal is cast into the casting cavity corresponding to the shape of the part, and the part or blank is obtained after it is cooled and solidified.
Each Dalian casting can be further divided into different types according to its composition or metallographic structure. For example, pig iron can be divided into grey cast iron, nodular cast iron, vermicular cast iron, malleable cast iron, alloy pig iron, etc. According to different casting methods, castings can be divided into ordinary sand castings, metal castings and die castings, suction and filtration castings, continuous castings, investment castings, porcelain castings, electroslag remelting castings, bimetal castings, etc. Among them, common sand castings are common, accounting for 80% of all castings. Such as aluminum, magnesium, zinc and other non-ferrous metal castings.
The quality of castings has a great influence on the performance of mechanical products. For example, the wear resistance and standard stability of machine tool castings directly affect the accuracy of machine tool service life; The standard, profile accuracy and surface roughness of the impeller, shell and hydraulic chamber of various pumps directly affect the working power of the machine tool. Energy consumption and cavitation development of pump body and hydraulic system; Internal combustion engine cylinder block; The strength and heat resistance of copper castings such as cylinder head, cylinder liner, piston ring and exhaust pipe directly affect the service life of the engine.
Casting advantages
(1) Raw materials come from a wide range of sources. Low price. Scrap steel, scrap, chip
(2) It can produce parts with complex shapes, especially blanks with complex cavities (such as heating)
(3) Wide adaptability. Metal materials commonly used in industry can be cast. A few grams to hundreds of tons.
(4) The shape and size of the casting are very close to the parts, which reduces the cutting amount and belongs to less and no cutting processing.
Stainless steel casting is a casting process with little or no cutting. It is an excellent process technology in the casting industry. It is widely used. It is not only applicable to the casting of various types and alloys, but also produces castings with higher dimensional accuracy and surface quality than other casting methods. Even the complex, high temperature resistant and difficult to process castings that are difficult to be cast by other casting methods can be cast by investment casting.
