Stainless steel precision casting has the advantages of high dimensional accuracy and good surface quality, and investment casting is a widely used advanced process with little and no cutting. One of the most important steps in die casting is casting, so what are the common casting methods for stainless steel precision casting?
1. Directional crystallization
Some investment castings such as turbine blades, magnetic steel, etc., if their crystalline structure is columnar crystals arranged in a certain direction, their working performance can be greatly improved, so the directional crystallization technology of investment casting is rapidly developed.
2. Crystallization under pressure
Put the shell in the pressure tank for pouring. After the end, the pressure tank is closed immediately, and high-pressure air or inert gas is introduced into the tank to solidify the casting under pressure to increase the density of the casting.
3. Vacuum suction pouring
Put the mold shell in the vacuum casting box, and suck the gas in the mold cavity through the tiny pores in the mold shell, so that the liquid metal can better fill the mold cavity, copy the shape of the mold cavity, improve the casting accuracy, prevent pores, pouring Insufficient defects.
4. Thermal gravity casting
This is the most widely used form of casting, that is, after the shell is removed from the roaster, it is cast at high temperature.
