Casting process for production of automobile steering device shell

Abstract

The invention relates to a casting process for production of an automobile steering device shell. Impurities and harmful gas in a molten aluminum alloy can be effectively removed by means of a molten aluminum treatment process, so that the purity of the molten aluminum alloy is increased, a series of casting defects such as cracks, cold shuts, slag blowholes and dispersed shrinkage which are prone to occur during casting of an aluminum alloy product are reduced, the mechanical property of the molten aluminum alloy cast product is improved, and the automobile steering device shell with high strength and quality is produced. The steering device shell cast through the casting process has the main advantages that (1) the compactness of a part is high, and a metallographic phase shows that the good metallographic structure can reduce potential risks like cast part fracture; (2) the inner porosity is low, the mechanical property of the cast part is improved, and the hidden danger of air leakage of the part is eliminated. Computed tomography (CT) shows that the inner porosity of the part produced in a pressure casting mode through the casting process is only about 3%, and it is only guaranteed that the porosity of an ordinary cast part is about 5%.

Description

technical field [0001] The invention relates to a casting and die-casting process of an aluminum alloy automobile steering gear, in particular to a casting process for producing an automobile steering gear shell. Background technique [0002] The rapid development of China's automobile industry has provided a broad space for the development of automobile spare parts production and supporting enterprises. In the fierce competition in the world automobile market, all countries are developing in the direction of high quality, high reliability, light weight, energy saving and low cost. In terms of materials, it is lightweight, replacing some steel (iron) parts with aluminum alloys, in order to meet the requirements of high-quality, low-cost development of automobiles; in terms of technology, it is scientific, using advanced technology to replace traditional technology to achieve The purpose of improving blank precision, reducing machining allowance, reducing raw material consum...

AI Technical Summary

Problems solved by technology

To further expand the application of aluminum alloy materials in automobile structures and powertrain systems, the existing preparation methods and manufacturing processes of aluminum alloy castings have been difficult to meet this requirement

At present, the traditional high-strength aluminum alloy castings have been produced by gravity casting or low-pressure casting. The aluminum alloy steering gear for automobiles manufactured by these traditional processes has various quality problems such as cold snaps, dents, and cracks in appearance, while Fatal defects such as pores, shrinkage cavities, and pinholes often appear inside, which seriously affect the performance of the product

At the same time, due to the low yield rate, low resource and energy utilization rate, low recycling rate of aluminum waste, serious environmental pollution and other defects, the rapid development of automobiles has been hindered.

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