Aluminum alloy used for preparing gearbox shell and preparation method thereof

A technology of aluminum alloy and gearbox, which is applied in the field of aluminum alloy, can solve problems such as unfavorable heat dissipation of the gearbox shell, unfavorable long-term use of the car, and influence on the sealing of the gearbox, so as to reduce oil leakage of the gearbox, light specific gravity, and reduce lubrication The effect of oil seepage

Inactive Publication Date: 2017-05-31
重庆顺博铝合金股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the prior art, if the aluminum alloy gearbox housing can satisfy crack resistance, friction resistance and tensile properties, etc., it will lead to an increase in the overall weight of the car to a certain extent, and the increase in the weight of the car will lead to serious exhaust pollution , is not conducive to environmental protection, and even fails to meet the relevant regulations on automobile exhaust emissions stipulated in the laws and regulations; at the same time, the increase in the weight of the gearbox casing will not be conducive to the heat dissipation of the gearbox casing, thereby affecting the sealing of the gearbox, and resulting in shifting The tank is prone to oil leakage, which is not conducive to the long-term use of the car, the consumption of lubricating oil is large, and the cost of car use increases

Method used

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  • Aluminum alloy used for preparing gearbox shell and preparation method thereof

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preparation example Construction

[0014] A method for preparing an aluminum alloy used to prepare a gearbox housing 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 pouring the molten raw materials from the bottom of the container Introduce preheated helium, remove reaction slag and scum, cast it into a mold after standing still, and take it out after cooling to obtain a primary shell, and then perform quenching treatment and aging treatment on the primary shell.

[0015] Concretely, the aluminum alloy for preparing the gearbox housing and the preparation method thereof of the present invention are carried out according to the following steps:

[0016] S1 material preparation steps:

[0017] Raw materials are allocated according to the ratio, and the raw materials include: 9.5-12.5% ​​silicon, 2.5-3.5% copper, 0.5-0.75% nickel, 3.5-4.5% magnesium, 7.5-8.5% zinc, 2.5-3.5% manganese , ...

Embodiment 1

[0038] Weigh the raw materials according to the proportion, including: 9.5% silicon, 2.5% copper, 0.5% nickel, 4.5% magnesium, 8.5% zinc, 2.5% manganese, 1.1% titanium, 2.5% chromium, 0.015% lanthanum, 0.002% yttrium, 0.015% samarium, and the balance aluminum.

[0039] Put the raw material into the container and heat it up to 775°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 shell; The temperature of the primary casing is lowered to 200°C, and then the temperature is lowered for the second time at a cooling rate of 8°C / min; finally, the gearbox casing is obtained by aging treatment at 160°C for 8 hours.

Embodiment 2

[0041] Weigh the raw materials according to the proportion, including: 12.5% ​​silicon, 3.5% copper, 0.75% nickel, 4.5% magnesium, 7.5% zinc, 3.5% manganese, 0.9% titanium, 1.5% chromium, 0.01% lanthanum, 0.004% yttrium, 0.01% samarium, and the balance aluminum.

[0042] Put the aluminum into the smelting furnace and raise the temperature to 775°C, then raise the temperature at a rate of 3°C / min until the temperature reaches 785°C, then add chromium, titanium, yttrium, nickel, silicon, manganese and samarium in sequence, and wait for the above elements to Add copper, lanthanum, magnesium and zinc after they are all melted, and feed helium gas that has been preheated for 3 minutes from the bottom of the smelting furnace to the raw materials in the molten state. After slag, 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 shell; The temperature of the primary shell is lowered to 250°C, and t...

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Abstract

The invention relates to an aluminum alloy used for preparing a gearbox shell and a preparation method thereof and belongs to the field of aluminum alloys. Raw materials of the aluminum alloy comprise 9.5-12.5% of Silicon, 2.5-3.5% of copper, 0.5-0.75% of nickel, 3.5-4.5% of magnesium, 7.5-8.5% of zinc, 2.5-3.5% of manganese, 0.9-1.1% of titanium, 1.5-2.5% of chrome, 0.01-0.015% of lanthanum, 0.002-0.004% of yttrium, 0.01-0.015% of samarium and the balance aluminum. The raw materials are heated till the temperature is 775-785 DEG C and then are melted; helium pre-heated for 2-3 min is pumped into the raw materials in a molten condition from the bottom of a container, clinker and dross are removed, then the raw materials in the molten condition are poured into a mould after standing is conducted for 20-30 min, and a primary manufactured shell is obtained; and quenching treatment is conducted at the temperature of 510-515 DEG C, and aging treatment is conducted at the temperature of 160-220 DEG C. The aluminum alloy used for preparing the gearbox shell is good in high-temperature mechanical property and airtightness, and the service life of a gearbox 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 a gearbox casing and a preparation method thereof. Background technique [0002] In the field of automotive parts, steel plates are widely used because of their high strength, good mechanical properties, and good forming. However, its high density will increase the weight of the entire car, thereby increasing energy consumption. With the continuous improvement of environmental protection awareness in recent years, it is required to reduce the weight of the car as a whole, and the use of steel plates has been greatly restricted. [0003] The proportion of aluminum alloy is only about one-third of that of steel plate, so it is more and more used in the field of automobile parts, but as far as the gearbox housing of automobiles is concerned, aluminum alloy materials are required to have good tensile strength , comprehensive mechanical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043C22C1/06F16H57/032
CPCC22C21/02C22C1/06C22F1/002C22F1/043F16H57/032
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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