Particle-reinforced AlSiTi cylinder sleeve and preparation method thereof

Abstract

The invention provides a particle--reinforced AlSiTi (aluminum-silicon-titanium) alloy cylinder sleeve which is composed of aluminum alloy and a certain content of Ti and Si. In the process of tubular casting solidification, the AlSiTi particles and partial Si particles dissolved from the aluminum melting solution can move outwards under the action of centrifugal force and finally generate a segregation layer of which a great quantity of primary AlSiTi particles and Si particles segregate on the outer layer in the tubular casting, particle primary crystal Si particles can move inwards and segregate in the inner layer, and the middle part is a substrate layer without particles. After the turning process is carried out on the inner layer and the outer layer of the tubular casting semifinished piece, an outer layer containing AlSiTi and Si particles with a high volume fraction can be left, thus the particle-reinforced aluminum alloy cylinder sleeve can be obtained. The aluminum cylinder sleeve and the aluminum cylinder body are combined and molded by pressure casting and then machined and assembled to obtain an all-aluminum internal combustion engine. The particle-reinforced AlSiTi alloy cylinder sleeve prepared by the method provided by the invention has light weight, high percentage composition in the particle volume, excellent wear-resisting property and high temperature resistant property and can improve the working efficiency of the engine.

Description

technical field [0001] The invention relates to an aluminum alloy cylinder liner and a casting method thereof. In particular, a particle-reinforced aluminum-silicon-titanium alloy cylinder liner and a manufacturing method thereof. Background technique [0002] As one of the core components of the internal combustion engine, the inner wall of the cylinder liner is directly in contact with high-temperature and high-pressure gas, so the working temperature is high and the heat load is large; and it makes high-speed reciprocating relative motion with the piston. The inner wall of the cylinder not only bears strong friction and wear, but also It must bear the impact side thrust of the piston, thus generating great thermal and mechanical stress inside the cylinder; the working environment of the cylinder liner is extremely harsh. Its quality directly affects the usability, reliability, economy and life of the internal combustion engine. [0003] Traditionally, cast iron is widel...

AI Technical Summary

Problems solved by technology

However, due to the segregation of particles in the inner layer of this cylinder liner, during the centrifugal casting process, casting slag inclusions, pores and other defects and particles migrate to the inner layer of the casting at the same time, and the coexistence of particles and defects makes machining more difficult , cylinder liner yield decreases

[0008] 4. Up to now, there are a few reports on centrifugally cast Al-Ti binary alloy gradient functional composite materials

[0009] There is no report on Al-Si-Ti ternary alloys containing high volume fractions of primary AlSiTi and Si particles, and there is no use of centrifugal casting to prepare Al-Si-Ti ternary alloys containing high volume fractions of primary particles. A Report on Al-Si-Ti Particle Gradient Functional Composite Materials

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