Thin-walled castings

Thin-walled castings are metal moldings obtained by various casting methods, that is, smelted liquid metal is poured into a pre-prepared mold by pouring, injection, inhalation or other casting methods, and after cooling, it is polished and other subsequent processing After the method, the obtained object has a certain shape, size and performance.

Classification: According to the different metal materials used, it is divided into steel castings, iron castings, copper castings, aluminum castings, magnesium castings, zinc castings, titanium castings, etc. Each type of casting can be further divided into different types according to its chemical composition or metallographic structure. For example, iron castings can be divided into gray iron castings, ductile iron castings, vermicular graphite iron castings, malleable iron castings, alloy iron castings, etc.; according to different casting molding methods, castings can be divided into ordinary sand castings, metal castings, and die castings , Centrifugal castings, continuous castings, investment castings, ceramic castings, electroslag remelting castings, bimetal castings, etc. Among them, ordinary sand castings are widely used, accounting for about 80% of all casting output. However, non-ferrous metal castings such as aluminum, magnesium, and zinc are mostly die castings.

The theoretical liquid metal forming of castings is often called casting. Casting technology has a long history. As early as more than 5,000 years ago, our ancestors were able to cast copper and bronze products. Casting is a widely used liquid metal forming process. A method of pouring liquid metal into a mold cavity, and after it cools and solidifies, to obtain a blank or part of a certain shape.

Liquid forming parts in machinery and equipment account for a large proportion. In machine tools, internal combustion engines, mining machinery, and heavy machinery, liquid forming parts account for 70% to 90% of the total weight; in automobiles and tractors, they account for 50% to 70%; Agricultural machinery accounts for 40% to 70%. The weight and size range of thin-walled castings are very wide. The light weight is only a few grams, the weight can reach 400 tons, the wall thickness is only 0.5 mm, the thickness can exceed 1 meter, and the length can be from a few millimeters to more than ten meters, which can meet different requirements. Requirements for use in the industrial sector.