Titanium-diboride-added hardening aluminum alloy material for cylinder cover and manufacturing method of material

Abstract

The invention discloses a titanium-diboride-added hardening aluminum alloy material for a cylinder cover. The titanium-diboride-added hardening aluminum alloy material is characterized by being composed of, by mass, 7.2% to 7.5% of silicon, 1.2% to 1.5% of zinc, 0.2% to 0.24% of magnesium, 0.03% to 0.05% of cadmium, 0.04% to 0.05% of tin, 1% to 2% of titanium diboride, 0.1% to 0.2% of cerium, 0.01% to 0.012% of silver, 45% to 50% of scrap aluminum master alloyed powder and the remaining being aluminum. Through research, alloy components are optimized, the scrap aluminum master alloyed powder, the cerium, the silver and other components are added, and the titanium diboride is further added; after the scientific and reasonable processing technology is adopted, the stability of a strengthening phase can be improved, and precipitation and growth of the strengthening phase are prevented; crystalline grains are refined, and therefore the performance of aluminum alloy is strengthened; and the manufactured aluminum alloy material is high in strength and heat, and good in heat stability and can be used for manufacturing the engine air cylinder cover.

Description

Technical field [0001] The invention relates to the field of aluminum alloys, in particular to a reinforced aluminum alloy material added with titanium diboride for cylinder heads and a preparation method thereof. Background technique [0002] At present, most car engine cylinder blocks and cylinder heads at home and abroad have been basically made of high-strength aluminum alloy. The all-aluminum alloy material reduces the weight of the car body. At the same time, it also enhances the heat dissipation effect of the engine, improves the efficiency of the engine, and has a life Longer. From the perspective of fuel saving, the advantages of cast aluminum engines in fuel saving have attracted people's attention. 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 a...

AI Technical Summary

Problems solved by technology

Although the traditional grades of aluminum-silicon alloys can already meet the requirements for general use, when the parts are in a complex stress state, there are often many deficiencies, such as low mechanical properties, insufficient strength, or poor heat resistance, etc. Therefore, it has important application significance for the research and development of cast aluminum alloys.

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