Precision casting method is refers to the use of non-metallic mold, product size accuracy is higher than ordinary sand casting of the floorboard of the casting process, including the dewaxing, plaster mold and ceramic mold method three categories.The lost wax casting method has two kinds: solid model method and the ceramic shell mold method, the improved method of the latter to the former.Ceramic shell mould method for the lost wax precision casting industry widely adopted, because it has the following advantages:(1) better dimensional stability(2) the fire-proof material usage is less(3) light weight, easy handling, processing, production of large castings(4) process can be partial automation to save manpower, increase production rate(5) the production cost is low(6) with thin ceramic shell mould, pouring castings after cooling rate is higher and evenly, so its better mechanical properties.
ure solid solution stability returns austenitic organization, thus eliminating magnetism.