Aluminum-chromium alloy casting technology

A casting process and chromium alloy technology, which is applied in the field of aluminum-chromium alloy casting process, can solve the problems of low strength, coarse grain size, shrinkage cavity and shrinkage, etc., and achieve high strength, good machinability and low filling pressure Effect

Inactive Publication Date: 2018-01-05
安徽省含山县兴建铸造厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aluminum alloy has the characteristics of light weight and is one of the most widely used lightweight structural materials in the industry. However, the formed parts often have defects such as low strength, shrinkage cavity shrinkage, and coarse particle size.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] An aluminum-chromium alloy casting process, in thermal solid solution treatment: the furnace loading temperature is 200°C, the heating rate is 110°C / hour, when the temperature rises to 700°C, heat preservation is carried out, and the heat preservation time is 1.5 hours. Heating at a speed of ℃ / hour to a molten liquid state, the annealing conditions are: keep warm at 850°C for 2.0 hours, then keep warm at 750°C for 4 hours, the quenching and tempering conditions are: keep warm at 1050°C for half an hour, air cooling, in Temper at 500°C for 2 hours.

[0014] As a further improvement to the above scheme, the chemical composition of the aluminum-chromium alloy contains the following components in terms of mass percentage: chromium accounts for 14%, silicon accounts for 8.5%, iron accounts for 0.8%, copper accounts for 0.4%, manganese accounts for 0.2%, Magnesium accounts for 0.5%, nickel accounts for 0.4%, zinc accounts for 0.2%, lead accounts for 0.08%, tin accounts for 0....

Embodiment 2

[0018] An aluminum-chromium alloy casting process, in thermal solid solution treatment: the furnace loading temperature is 210°C, the heating rate is 115°C / hour, when the temperature rises to 750°C, heat preservation is carried out, and the heat preservation time is 2.0 hours. Heating at a speed of ℃ / hour to a molten liquid state, the annealing conditions are: keep at 880°C for 2.2 hours, then keep at 800°C for 4.5 hours, the quenching and tempering conditions are: keep at 1080°C for half an hour, air cooling, in Temper at 530°C for 2.5 hours.

[0019] As a further improvement to the above scheme, the chemical composition of the aluminum-chromium alloy contains the following components in terms of mass percentage: chromium accounts for 15%, silicon accounts for 9.0%, iron accounts for 0.85%, copper accounts for 0.5%, manganese accounts for 0.25%, Magnesium accounts for 0.55%, nickel accounts for 0.45%, zinc accounts for 0.25%, lead accounts for 0.09%, tin accounts for 0.06%, a...

Embodiment 3

[0023] An aluminum-chromium alloy casting process, in thermal solution treatment: the furnace loading temperature is 230°C, the heating rate is 120°C / hour, when the temperature rises to 800°C, heat preservation is carried out, and the heat preservation time is 2.5 hours. Heating at a speed of ℃ / hour to a molten liquid state, the annealing conditions are: heat preservation at 900°C for 2.5 hours, and then heat preservation at 850°C for 5 hours, the quenching and tempering conditions are: heat preservation at 1100°C for half an hour, air cooling, in Temper at 550°C for 3 hours.

[0024] As a further improvement to the above scheme, the chemical composition of the aluminum-chromium alloy contains the following components in terms of mass percentage: chromium accounts for 16%, silicon accounts for 9.5%, iron accounts for 0.9%, copper accounts for 0.6%, manganese accounts for 0.3%, Magnesium accounts for 0.6%, nickel accounts for 0.5%, zinc accounts for 0.3%, lead accounts for 0.10...

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PUM

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Abstract

The invention relates to the technical field of metal casting, and discloses an aluminum-chromium alloy casting technology. According to the aluminum-chromium alloy casting technology, a prepared aluminum-chromium alloy has the advantages of being excellent in casting property and mechanical property, high in strength, high in temperature creep limit, good in stability, good in machinability, small in casting crack sensitivity, good in liquidity, airtightness and crack resistance, high in corrosion resistance, high in surface corrosion resistance and stress corrosion resistance, high in impacttoughness, high in elongation rate, good in casting performance and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to an aluminum-chromium alloy casting process. Background technique [0002] Casting is a kind of metal thermal processing technology mastered by human beings earlier, with a history of about 6,000 years. China has entered the heyday of bronze castings between 1700 BC and 1000 BC, and the craftsmanship has reached a very high level. Casting is a method in which liquid metal is poured into a casting cavity adapted to the shape of the part, and after it is cooled and solidified, the part or blank is obtained. The material to be cast is mostly a metal that was originally solid but heated to a liquid state (for example: copper, iron, aluminum, tin, lead, etc.), and the material of the mold can be sand, metal or even ceramics. Depending on the requirements, the methods used will vary. Casting is the process of smelting metal into a liquid that meets certain requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22C21/00
Inventor 李传
Owner 安徽省含山县兴建铸造厂
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