Aluminum alloy for preparing engine cylinder body and preparation method thereof

An engine block and aluminum alloy technology, applied in the field of aluminum alloy, can solve the problems of increasing weight density, affecting the service life of the engine, unfavorable engine cooling and heat dissipation, etc., and achieving improved strength and hardness, good room temperature performance and high temperature performance, and light specific gravity. Effect

Inactive Publication Date: 2017-05-31
重庆顺博铝合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Since the cylinder block of the engine has to bear the high-pressure gas inside the cylinder block and the friction generated when the piston works, as well as the thermal stress caused by the high-temperature gas, the aluminum alloy used to prepare the engine block must have stronger wear resistance, Mechanical properties such as tensile strength, the existing technology mainly achieves the above purpose by increasing the rigidity of aluminum alloy, but increasing the rigidity of aluminum alloy will inevitably increase its weight density, which is not conducive to the cooling and heat dissipation of the engine, and will easily affect the service life of the engine

Method used

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  • Aluminum alloy for preparing engine cylinder body and preparation method thereof

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preparation example Construction

[0015] A method for preparing an aluminum alloy used to prepare an engine block provided by the present invention includes: preparing the above-mentioned various raw materials in proportion, heating and melting the various raw materials in a container, and passing the molten raw materials from the bottom of the container Inject preheated helium, remove reaction slag and scum, cast it into a mold after standing still, take it out after cooling, and obtain the primary cylinder body, and then perform quenching treatment and aging treatment on the primary cylinder body.

[0016] Specifically, the aluminum alloy for preparing the engine block and the preparation method thereof of the present invention are carried out according to the following steps:

[0017] S1 material preparation steps:

[0018] Raw materials are allocated according to the ratio, and the raw materials include: 8.5-11.5% silicon, 2-5% copper, 0.7-0.9% iron, 0.55-0.65% magnesium, 0.15-0.35% manganese, 0.6-0.65% zi...

Embodiment 1

[0040] Weigh the raw materials according to the proportion, including: 8.5% silicon, 2% copper, 0.7% iron, 0.55% magnesium, 0.15% manganese, 0.65% zinc, 0.06% nickel, 0.15% titanium, 0.25% zirconium, 0.015% erbium, 0.004% thulium, 0.015% lutetium, and the balance aluminum.

[0041] Put the raw material into the container and heat it up to 705°C until it melts, and feed the helium gas that has been preheated for 2 minutes from the bottom of the container to the raw material in the molten state. After slag, let the raw material in molten state stand for 20 minutes, then cast it into the mold, take it out after cooling, and obtain the primary cylinder; The temperature of the initial cylinder block was lowered to 200°C, and then the second cooling was performed at a cooling rate of 8°C / min; finally, the engine block was obtained by aging treatment at 180°C for 5 hours.

Embodiment 2

[0043] Weigh the raw materials according to the proportion, including: 11.5% silicon, 5% copper, 0.9% iron, 0.65% magnesium, 0.35% manganese, 0.6% zinc, 0.04% nickel, 0.1% titanium, 0.1% zirconium, 0.01% erbium, 0.002% thulium, 0.01% lutetium, and the balance aluminum.

[0044] Put the aluminum into the smelting furnace and raise the temperature to 705°C, then raise the temperature at a rate of 5°C / min until the temperature reaches 720°C, then add zirconium, titanium, lutetium, thulium, iron, erbium, nickel, silicon and manganese in sequence After all the above elements are melted, copper, magnesium and zinc are added, and helium gas that has been preheated for 3 minutes is introduced from the bottom of the melting furnace to the raw materials in the molten state. After mixing with scum, let the raw material in molten state stand for 30 minutes, then cast it into the mold, take it out after cooling, and obtain the primary cylinder body; then perform quenching treatment, and af...

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Abstract

The invention relates to an aluminum alloy for preparing an engine cylinder body and a preparation method thereof and belongs to the field of aluminum alloys. Raw materials are prepared according to a formula which comprises 8.5-11.5% of silicon, 2-5% of copper, 0.7-0.9% of iron, 0.55-0.65% of magnesium, 0.15-0.35% of manganese, 0.6-0.65% of zinc, 0.04-0.06% of nickel, 0.1-0.15% of titanium, 0.1-0.25% of zirconium, 0.01-0.015% of erbium, 0.002-0.004% of thulium, 0.01-0.015% of lutecium and the balance aluminum. The temperature is raised to be 705-720 DEG C to conduct melting, helium which is pre-heated for 2-3 min enters molten raw materials from the bottom of a container, molten slag and floating slag are removed, and after still standing is conducted for 20-30 min, the molten raw materials are casted into a mold, and thus a primarily-prepared cylinder body is obtained; and quenching treatment and aging treatment are conducted under the temperature of 410-430 DEG C and the temperature of 180-200 DEG C correspondingly. The aluminum alloy is good in heat dispersion property, and the service life of an engine is prolonged.

Description

technical field [0001] The invention relates to the field of aluminum alloys, and in particular to an aluminum alloy used for preparing an engine block and a preparation method thereof. Background technique [0002] Due to its low density, high specific strength, and excellent casting performance, corrosion resistance, weldability and thermal expansion, aluminum alloys can be used to produce complex shapes, thin walls, corrosion resistance, high air tightness requirements, and medium to high loads. Static or impact loads to become one of the most valued structural materials in manufacturing. [0003] As the automobile industry is facing more and more serious problems of energy, public hazards and safety, the laws and regulations on energy saving, exhaust emission reduction, noise reduction and other issues are constantly improving and becoming stricter. The most effective way to solve the above problems in the automotive industry is to reduce the quality of the car itself, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043
CPCC22C21/02C22C1/026C22F1/002C22F1/043
Inventor 王增潮李新生罗乐
Owner 重庆顺博铝合金股份有限公司
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