Nickel-phosphorus alloy cast low-pressure casting technique

Abstract

The invention discloses a nickel-phosphorus alloy cast low-pressure casting technique. The technique comprises the steps that nonferrous metal is poured into molten metal at a certain temperature, after the molten metal is solidified and cooled, a template is formed, a plastic film which is baked to be of a plastic state is applied onto the template to be heated, the temperature is controlled, andmeanwhile, air is pumped out by a vacuum pump so that the film is tightly applied to the template to be formed; a sand box with a filter suction pipe is put onto the template coated with the plasticfilm; and the sand box is filled with dry quartz sand, the sand is compacted through slight shocking, the sand is scraped, a sealing film is put on the sand, the air in the box is sucked out through the filter suction pipe, the vacuum state in the box is relieved after the pressure reaches a certain level, and a finished product is obtained. The nickel-phosphorus alloy cast low-pressure casting technique has the advantages that the cast precision is improved, mechanical machining is reduced, the cost is reduced, energy consumption is reduced, the service life is prolonged, and using is convenient.

Description

technical field [0001] The invention relates to a low-pressure casting process for nickel-phosphorus alloy castings. Background technique [0002] Casting nickel-phosphorus alloy is an aluminum alloy that fills the mold with molten metal to obtain blanks of parts of various shapes. It has the advantages of low density, high strength, good corrosion resistance and casting process, and is less restricted by the structural design of parts. It is used to manufacture beams, gas turbine blades, pump bodies, pylons, hubs, air intake lips and engine parts. Receiver etc. It is also used to manufacture parts such as cylinder heads, gearboxes and pistons of automobiles, housings of instruments and meters, and booster pump bodies. Casting nickel-phosphorus alloy has good casting performance and can be made into parts with complex shapes; it does not require huge additional equipment; it has the advantages of saving metal, reducing costs, and reducing working hours, etc. However, when ...

AI Technical Summary

Problems solved by technology

Casting nickel-phosphorus alloy has good casting performance and can be made into parts with complex shapes; it does not require huge additional equipment; it has the advantages of saving metal, reducing costs, and reducing working hours, etc. However, when traditional nickel-phosphorus alloy castings are cast, pores will occur Problems such as bubbles, shrinkage porosity and cracks lead to rough surface and loose structure of castings, which affect the performance and service life of castings. Therefore, we propose a casting process for high-density nickel-phosphorus alloy castings to solve the above problems