Aluminium casting alloy cylinder cap

A technology of casting aluminum alloy and cylinder head, which is applied in the direction of cylinder head, cylinder, engine components, etc., can solve the problems of composition segregation, thermal fatigue, coarse grain structure, etc., and meet the requirements of high pressure, high performance and high tensile strength , quality and reliable effect

Inactive Publication Date: 2010-02-10
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most commonly used aluminum alloy material is AL-Si casting alloy. After casting, age hardening or precipitation strengthening is used to improve the mechanical properties. However, at high temperature, the grain structure of this material is coarse and the composition is segregated, which makes the performance of the aluminum alloy cylinder head unstable. , prone to thermal fatigue, cracking and other problems, does not meet the needs of supercharged engines

Method used

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  • Aluminium casting alloy cylinder cap

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Effect test

Embodiment 1

[0016] Embodiment 1: cast aluminum alloy cylinder head, its chemical composition is 9.72% Si by weight percentage, the Cu of 2.46%, the Mg of 0.27%, the Mn of 0.25%, the Fe of 0.29%, balance is AL, hardness 110HBS.

[0017] The production process adopted is: melting - modification - refining - low pressure casting - T6 heat treatment - finished product.

Embodiment 2

[0018] Embodiment 2: cast aluminum alloy cylinder head, its chemical composition is 8.84% Si by weight percentage, 2.61% Cu, 0.19% Mg, 0.29% Mn, 0.3% Fe, balance is AL, hardness 125HBS. The production process adopted is: melting - modification - refining - low pressure casting - T6 heat treatment - finished product.

Embodiment 3

[0019] Embodiment 3: cast aluminum alloy cylinder head, its chemical composition is 9.87% Si by weight percentage, the Cu of 2.47%, the Mg of 0.29%, the Mn of 0.22%, the Fe of 0.29%, balance is AL, hardness 126HBS. The production process adopted is: melting - modification - refining - low pressure casting - T6 heat treatment - finished product.

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Abstract

The invention relates to an aluminium casting alloy cap, comprising the following chemical components by weight percent: 8-10% of Si, 2-3% of Cu, 0.15-0.35% of Mg, less than 0.3% of Mn, less than 0.45% of Fe, the balance Al. The hardness of the cylinder cap is 100-130HBS. The material adopted by the aluminium casting alloy cap of the invention is on the basis of aluminium-silicon alloy, micro elements of Fe, Cu, Mg and the like are added to form more Mg2Si, Al3Mg2, CuAl2 and the like, so that strengthening phase is formed in the alloy, and grain structure is refined by solution treatment, thusimproving comprehensive mechanical property of material and meeting requirement of high boost high performance.

Description

technical field [0001] The invention relates to an aluminum alloy cylinder head for an engine and a manufacturing process thereof. Background technique [0002] Existing engine aluminum alloy cylinder heads generally adopt aluminum alloy AC4B (material grade) to carry out gravity casting and form. The most commonly used aluminum alloy material is AL-Si casting alloy. After casting, age hardening or precipitation strengthening is used to improve the mechanical properties. However, at high temperature, the grain structure of this material is coarse and the composition is segregated, which makes the performance of the aluminum alloy cylinder head unstable. , prone to thermal fatigue, cracking and other problems, does not meet the needs of supercharged engines. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a cast aluminum alloy cylinder head for a supercharged engine, which meets the requirements of high superchar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/24C22C21/02
Inventor 王锐韦颂闵龙成卫国
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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