Preparation method of piston cast aluminium alloy

Abstract

The invention discloses a preparation method of piston cast aluminium alloy. The piston cast aluminium alloy is composed of aluminium ingot, copper element, magnesium element, silicon element, nickel element, chromium element, iron element, manganese element, zinc element, titanium element, lead element and tin element, and the piston cast aluminium alloy is formed by adding high-phosphorus alloy type alterant for treatment during the production process. According to the invention, 11 elements including nickel, chromium, iron and the like are added in the cast aluminium alloy to remarkably improve the alloy performance and stabilize quality. In addition, the high-phosphorus alloy type alterant is adopted for modification treatment and is small in added amount and free of pollution; the reaction slag is less, the phosphorus absorptivity is stable, and a furnace lining, a crucible and a tool are prevented from corrosion, so that the service life of the furnace lining and the crucible is prolonged; the added amount can be precisely controlled, so that alloy loss is reduced, the casting yield of the alloy is increased, and the high-phosphorus alloy type alterant is environment-friendly. Moreover, emission of waste residue and exhaust gas is also reduced during the melting process of the aluminium ingot, the environment is protected, and the economic benefit and the social benefit are remarkable.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a novel aluminum alloy, and in particular relates to a method for preparing a piston casting aluminum alloy. [0002] technical background [0003] The engine is like the "heart" of a car, and the piston can be understood as the "center" of the engine. In addition to being in a harsh working environment, it is also the busiest one in the engine, constantly moving from bottom dead center to top. Dead center, reciprocating motion from top dead center to bottom dead center, suction, compression, workmanship, exhaust... The interior of the piston is hollowed out, more like a hat, and the round holes at both ends connect the piston The piston pin is connected to the small end of the connecting rod, and the large end of the connecting rod is connected to the crankshaft, which converts the reciprocating motion of the piston into the circular motion of the crankshaft. If the piston ring is not insta...

AI Technical Summary

Problems solved by technology

[0004] At present, the performance of aluminum alloy materials for pistons produced in my country is not stable enough, and the performance of self-developed engine pistons still has a certain gap compared with developed countries such as the United States, Eastern Europe and Japan.