A kind of magnesium alloy differential pressure casting method

Abstract

The invention discloses a magnesium alloy differential pressure casting machine and a casting method, relates to a casting machine and a casting method and aims at solving the problems that the defects of shrinkage porosity and cavity, secondary oxidization slag inclusion and the like exist in castings obtained through an existing magnesium alloy casting manner, the mechanical performance of the castings is reduced, and due to barometric pressure casting, magnesium combustion cannot be avoided or controlled. The magnesium alloy differential pressure casting machine comprises an upper tank, a lower tank, a casting die, a magnesium alloy heat preservation furnace, a middle partition plate, a liquid elevating pipe, an upper tank motion control frame and a lower tank motion control frame. Theupper tank is arranged on the upper tank motion control frame capable of driving the upper tank to move transversely and vertically. The lower tank is arranged on the lower tank motion control frame capable of driving the lower tank to move vertically and transversely. The casting die is arranged in the upper tank and placed on the middle partition plate, and the magnesium alloy heat preservationfurnace is arranged in the lower tank. The method mainly comprises the first step of preparation, the second step of casting die positioning, the third step of lower tank positioning, the fourth stepof upper tank positioning and the fifth step of alloy liquid pouring. The magnesium alloy differential pressure casting machine and the casting method are used for magnesium alloy casting.

Description

technical field [0001] The invention relates to a casting machine and a casting method, in particular to a magnesium alloy differential pressure casting machine and a casting method, and belongs to the field of alloy manufacturing. Background technique [0002] General magnesium alloy castings are formed by traditional sand casting and gravity casting. Since the pouring process is carried out under normal pressure, the mold is filled by the gravity of the magnesium alloy liquid, and the filling speed cannot be accurately controlled. During the filling process, splashes form secondary oxidation slag inclusions; magnesium alloys have low density, poor liquid flow and shrinkage capabilities, and castings are prone to shrinkage cavities and shrinkage porosity. Shrinkage cavities and shrinkage porosity defects cannot be eliminated, which reduces the process yield of molten metal. This traditional gravity pouring method causes defects such as shrinkage cavity and secondary oxida...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an automatic magnesium alloy differential pressure casting machine and casting method, in order to solve the defects such as shrinkage cavity, secondary oxidation slag inclusion and the like in the casting obtained by the existing magnesium alloy casting method, reduce the mechanical properties of the casting, and the atmospheric pressure casting cannot Avoiding and Controlling Magnesium Burning Problems

Images