Castings Meet The Use Requirements Of Different Industrial Sectors

- Sep 05, 2017 -

The theory of casting forming metal liquid forming is often called casting, casting forming 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 the most widely used metal liquid forming process. It is the liquid metal pouring into the mold cavity, after its cooling and solidification, to obtain a certain shape of the blank or parts of the method. In the machine equipment, the proportion of liquid forming parts is very large, in the machine tools, Casting Parts internal combustion engines, mining machinery, heavy machinery, liquid forming parts of the total weight of the $number; in the automobile, the tractor occupies the $number, occupies the $number in the agricultural machinery. Casting Parts The liquid forming process can be used in such a wide range of applications because it has the following advantages: (1) The inner cavity and the complex shape of the blank can be manufactured. such as a variety of box, machine bed, cylinder body, cylinder head and so on. (2) Process flexibility, wide adaptability. Casting Parts The size of the liquid molded parts is almost unlimited, the weight can be from a few grams to hundreds of tons, the wall thickness can be from 0.5mm to 1m. Metals that can be dissolved into liquids in industry can be used for liquid forming.

For ductile iron with poor plasticity, liquid forming is the only way to produce its blanks or parts. (3) Low cost of liquid forming parts. Liquid molding can directly use waste parts and chips, equipment costs lower. At the same time, the liquid molding parts processing allowance is small, saves the metal. However, the process of metal liquid forming is much, and it is difficult to control accurately, Casting Parts so the quality of castings is not stable enough. Compared with the forgings of the same material, due to the loose liquid forming structure and coarse grains, the internal porosity, shrinkage, porosity and other defects are easy to produce. Casting Parts Its mechanical properties are low. In addition, the labor intensity is big, the condition is poor. have excellent mechanical, physical properties, it can have a variety of different strength, hardness, toughness, combined with the comprehensive performance, Casting Parts but also a combination of a variety of special properties, such as wear-resistant, high temperature and low temperature, corrosion and so on.

Casting weight and size range are very wide, the lightest weight only a few grams, the heaviest can reach 400 tons, the wall thickness of the thinnest only 0.5 mm, the thickest can exceed 1 meters, Casting Parts the length can be a few millimeters to more than 10 meters, can meet the requirements of different industrial sectors.

Use

The use of castings is very extensive, has been used to hardware and the entire machinery and electronics industry, and its use is becoming a growing trend. Concrete use, construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, automobiles, locomotives, electronics, computers, electrical appliances, lamps and other industries, Casting Parts many are ordinary people contact all day, but do not know the metal objects.

If the castings are of good quality, they should have the characteristics of clear outline, precise size, compact microstructure and fine grain.

The casting performance of the alloy is required for the structure of castings: the wall thickness of castings should be reasonable first to ensure the requirement of alloy fluidity. Then consider as far as possible not to make the casting wall thickness is too large, the casting thick wall should consider the shrinkage is convenient, Casting Parts avoid the casting shrinkage when blocked; the wall thickness of castings should be as homogeneous as possible to form shrinkage, shrinkage, coarse grains and other defects The castings should avoid large horizontal surfaces as far as possible.

Casting process to the requirements of the casting structure: avoid the shape of the living block, simplify the casting structure, reduce the type of surface, Casting Parts as far as possible to reduce or not use the core, consider the core of the fixed, venting and cleaning;