casting, refers to the production of a product by a casting process. Casting is called liquid metal into the casting cavity and adapted to the shape of the part, the solidified After cooling, to obtain a method for producing parts or blank. .
Application of the casting 1
are widely used: 40 to 70 percentage of the agricultural machine tools: 70 to 80 weight percent of the casting
2 Castings advantage
.
wide range of sources (1) starting material. Low prices. Scrap, scrap, chips
(2) parts of complex shape can be produced, particularly complex blank lumen (such as heating)
(3) Wide adaptability, a metallic material commonly used in industry It can be cast. A few grams to several hundred tons.
the shape and size of the part (4) is very close to the casting, reduce the amount of cutting, is no less cutting.
3. Casting disadvantages
(1) Mechanical properties inferior to forging (coarse microstructure, many defects, etc.)
(2) sand of the casting, the single, small approved, big labor intensity.
(3) the quality of castings unstable, multi-step, complex factors, easy to produce many defects.