Stainless steel casting has the advantages of high precision, good surface quality, etc., and investment casting is an advanced process that is widely used with less drilling and no drilling. One of the key processes in solid model investment casting is pouring, so what are the common pouring methods for precision castings of stainless steel plates?
1. Fixed item crystal
Some sand castings such as turbine blades, magnetic tiles, etc., if their crystal structures are columnar crystals arranged in a certain direction, their working characteristics can be improved a lot, so investment casting fixed crystal technology is rapidly developing Get trending.
2. Crystals under working pressure
Put the shell into the pressure tank for pouring. After the completion, close the pressure tank immediately and enter the high-pressure gas or rare gas into the tank to freeze the casting under pressure to increase the density of the casting.
3. Vacuum pump breathing pouring
Put the shell into the vacuum pouring box, and pump the gas in the die according to the fine porosity in the shell, so that the shape memory alloy can better fill the die, copy the shape of the die, and improve the precision of the casting To avoid the shortcomings of vent holes and insufficient pouring.
4. Intermittent heat pouring
This is also a commonly used pouring method, that is, after the shell is removed from the calciner, it is poured at a high temperature.