1, It can cast a variety of alloy complex castings, in particular, can cast high temperature alloy castings. Such as jet engine blades, its streamlined profile and the cooling cavity, using mechanical processing is almost impossible to form. With investment casting process can not only do mass production, to ensure the consistency of the casting, and to avoid residual machining after machining stress concentration.
2, Investment Castings high dimensional accuracy, generally up to CT4-6 (sand cast CT10 ~ 13, die-casting CT5 ~ 7), of course, due to the complexity of investment casting process, casting dimensional accuracy factors, For example, the shrinkage of the mold, the deformation of the mold, the shell in the heating and cooling of the line changes in the amount of alloy shrinkage and the deformation of the casting during solidification, so ordinary die-castings, although the higher dimensional accuracy, However, its consistency still needs to be improved. (Consistency of castings with medium and high temperature waxes should be much improved.)
3, Suppression of investment, the cavity surface finish with high pressure, therefore, the surface finish of the investment is relatively high. In addition, the shell is made of high temperature resistant special binder and refractory coating made of refractory coating coated on the melt made of the molten metal in direct contact with the cavity surface finish. Therefore, the investment casting surface finish than the average casting high, generally up to Ra.1.6 ~ 3.2μm.
4, The biggest advantage of investment casting is due to the investment casting has a high dimensional accuracy and surface finish, it can reduce the machining work, but the parts require a higher position to leave a little allowance, and even some Cast only grinding, polishing margin, without machining can be used. Thus, the use of investment casting method can save a lot of machine tools and processing time, a substantial saving of metal raw materials.