What is the defect when casting s less than 0.06%?
Casting is the method of casting liquid metal into the casting cavity which is in accordance with the shape of parts. After cooling and solidification, it can obtain parts or blanks. The cast material is mostly solid but heated to liquid metal (copper, iron, aluminum, tin, lead, etc.), while the mold material can be sand, metal, or even ceramic.
Wax loss methodThe method can be used for the outer shell casting method and the solid casting process.First the object needed to replicate wax casting, and dry and then dipped into a ceramic containing pool, the wax replica covered with a layer of ceramic membrane, repeating the steps until the outer membrane is sufficient to support the casting process (about 1/4 inch 1/8 inch), then melting the wax mold, and cast away die. Thereafter, the mold needs to be heated many times, increasing the hardness before casting.This method has good accuracy and can be used as a foundry for high melting point metals (such as titanium). But because the price of ceramic is quite high, and the manufacture needs many heating and complex, the cost is very expensive.
Casting type:Sand mold casting processSand is used as casting material, and sand can be subdivided into wet sand casting and surface dry sand casting by different components. But not all sand can be cast.Advantage is low cost, because of the use of the mold sand can be used repeatedly; the disadvantage is time-consuming mold manufacture, the mold itself cannot be reused to damage can be achieved after finished.Metal mould casting processA mold made from a metal whose melting point is higher than that of the material. They are subdivided into gravity casting, low pressure casting and high pressure casting.Subject to the melting point of the mold, the casting metal is also limited.
