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Strengthening mechanism of cast heat resistant aluminum alloy

According to the high temperature strength theory of metals, with the increase of temperature, the strength of grain boundary decreases significantly, which makes the grain boundary become the weak link at high temperature. The plastic deformation mechanism changes from low temperature sliding to high temperature diffusion deformation, and the...

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Study on properties of cast heat resistant aluminum alloy

In view of the complex service environment of automobile engine cylinder and piston, cast heat-resistant aluminum alloy not only has excellent high temperature mechanical properties, but also has high creep resistance, heat exposure resistance, fatigue resistance and certain dimensional stability. 1. High temperature mechanical properties At present, the research...

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Microstructure control of cast heat resistant aluminum alloy

The microstructure and morphology of materials play an important role in determining their mechanical, thermal and electrical properties. It is the main idea to improve the high temperature properties of cast aluminum alloy by proper alloying and heat treatment. 1. Alloying Alloying is the main means to improve the...

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Development status of cast heat resistant aluminum alloy

Cast heat-resistant aluminum alloy is a kind of aluminum alloy which is prepared by casting, has good oxidation resistance and excellent mechanical properties at high temperature, has good creep resistance under certain temperature and load (dynamic or static) for a long time, and has good thermal conductivity and low...

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Rheo squeeze casting of aluminum alloy

The semi-solid slurry of high strength wrought aluminum alloy 7075 was prepared by lspsf process. The rheo indirect squeeze casting was carried out on the model j15-300 vertical semi-solid squeeze casting machine developed in the laboratory. The rheo indirect squeeze casting of small batch wheel shaped parts was successfully...

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Characteristics of 7075 wrought aluminum alloy

The material used in the experiment is 7075 ultra-high strength wrought aluminum alloy. The solidus temperature is 477 ℃ and the liquidus temperature is 635 ℃. The temperature difference between liquid and solid phase is large, which is suitable for semi-solid forming. The sensitivity of solid ratio to temperature...

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Experiment on rheo squeeze casting of aluminum alloy

Cast aluminum alloy, with good flow filling performance, wear resistance, and good dimensional stability, make its casting performance is good, automobile, motorcycle engine and related industrial fields have been widely used. Aluminum alloy is used in automobile engine to make cylinder block, which has the advantages of better heat...

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