Silicon and aluminum alloy material used for novel cylinder cover and preparation method of silicon and aluminum alloy material

Abstract

The invention discloses a silicon and aluminum alloy material used for a novel cylinder cover. The silicon and aluminum alloy material used for the novel cylinder cover is characterized by being composed of, by mass, 7-8 parts of silicon, 0.2-0.25 part of magnesium, 0.55-0.6 part of zinc, 2.5-3 parts of nickel, 0.1-0.3 part of titanium, 45-50 parts of aluminum scrap intermediate alloy powder and the balance aluminum. By optimizing alloy components and adopting a scientific and reasonable heat treatment technology, the mechanical property of an alloy can be improved, and particularly the high-temperature mechanical property of the alloy can be improved; besides, stability of chemical phases can be improved, strengthening phases are prevented from being precipitated and growing larger, and the impact resistance of the alloy is improved. The smelting process of the manufactured aluminum alloy material is simple and easy to operate, no complicated operating devices are needed technologically, and the alloy material is universal, beneficial to popularization and capable of being used for manufacturing engine cylinder covers.

Description

Technical field [0001] The invention relates to the field of aluminum alloys, in particular to a new type of silicon aluminum alloy material for cylinder heads and a preparation method thereof. Background technique [0002] Cast aluminum alloy has a series of advantages such as small specific volume, high strength, good casting formability, excellent processing performance, small expansion coefficient and good fluidity, and is widely used in industries such as automobiles, aviation, aerospace, and home appliances. At present, most car engine cylinder blocks and cylinder heads at home and abroad have been basically made of high-strength aluminum alloys, because every time the weight of the car is reduced, its fuel consumption can be reduced by 0.6%-1%. In order to reduce fuel consumption, but also to reduce the pollution of the air environment caused by automobile exhaust emissions, reducing the weight of automobiles is an important measure. Therefore, it has become a development...

AI Technical Summary

Problems solved by technology

Although the traditional grades of aluminum-silicon alloys can already meet the requirements for general use, there are often many shortcomings when the parts are in a complex stress state.

For example, although the alloy composition of ZL101 is simple, its mechanical properties are not high, so it can only be used for parts with low strength requirements; ZL104 has relatively poor heat resistance, so it has important application significance for the research and development of cast aluminum alloys.

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