Manufacturing method for aluminum alloy oil pump shell and aluminum alloy oil pump shell manufactured by manufacturing method

Abstract

The invention discloses a manufacturing method for an aluminum alloy oil pump shell and the aluminum alloy oil pump shell manufactured by the manufacturing method. The method comprises the steps that (a) materials are prepared according to the following components and mass parts of the components, specifically, an aluminum alloy material used by the aluminum alloy oil pump shell comprises, by mass, 7%-10% of Si, 2-4% of Cu, 0-0.5% of Mg, 0-0.5% of Mn, 0-0.8% of Fe, 0-1% of Zn, 0-0.35% of Ni, 0-0.1% of Sn, 0-0.2% of Pb, 0-0.2% of Ti and the balance Al, and the total number is 100%; (b) the aluminum alloy material is refined under the environment with the temperature being 720-750 DEG C to obtain a molten aluminum alloy, after refining, liquid outlet is conducted, and the liquid outlet temperature of the molten aluminum alloy is controlled to be 720-750 DEG C; and (c) the molten aluminum alloy after liquid outlet is transferred to a heat preservation furnace, the temperature of the molten aluminum alloy is controlled to be 680-690 DEG C, and the heat preservation furnace is subjected to degassing treatment. The phenomenon of molten aluminum air entrapment in the pressing-spraying process can be avoided, thus the requirement of T6 heat treatment can be completely met, casting efficiency is improved, the product pass rate is increased, low consumption of resources and energy is achieved, and increasing of economic benefits is promoted.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy oil pump casing and the manufactured aluminum alloy oil pump casing. Background technique [0002] At present, for the die castings produced by conventional die casting, it is inevitable that the aluminum liquid entrains gas during the injection process, resulting in a large gas content inside the product. During the T6 heat treatment process, the product will bulge or the pores will gather and cause defects on the processed surface. Currently, T6 heat treatment is required. Aluminum alloy die castings generally use gravity casting. This casting method is dense inside the product and has no obvious defects after T6 heat treatment, but the production efficiency is very low, local details are difficult to form, and the rough machining allowance is large. Generally, it can only be used for products with simple structures. . Contents of the invention [0003] The technical problem to ...

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Problems solved by technology

[0002] At present, for die castings produced by conventional die casting, it is inevitable that the liquid aluminum entrains gas during the injection process, resulting in a large gas content inside the product. During the T6 heat treatment process, the product will bulge or the pores will gather and cause defects on the processed surface. Currently, T6 heat treatment is required. Aluminum alloy die castings generally use gravity casting. This casting method is dense inside the product and has no obvious defects after T6 heat treatment, but the production efficiency is very low, local details are difficult to form, and the rough machining allowance is large. Generally, it can only be used for products with simple structures.