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Aluminum automobile transmission shell

A technology for automotive gearboxes and gearboxes, applied in the field of metallurgy, can solve problems such as high scrap rate, unstable performance, uneven surface, etc., and achieve the effects of good bonding layer performance, optimized design, and improved performance

Active Publication Date: 2016-06-29
徐州超杰电动车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found through practice that the performance of this process is unstable between batches, and some batches have bubbles and uneven surfaces, indicating that the process is unstable as a whole, resulting in a high reject rate, therefore, it cannot meet actual needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An aluminum automobile gearbox casing, the gearbox casing is composed of an aluminum alloy base material and an electroplating layer on the outside; the aluminum alloy is composed of the following components by weight percentage: Zn: 7%, Si: 14%, Cu: 6%, Mn: 4%, Ti: 0.8%, Re: 0.5%, Mg: 3%, Zr: 3%, Ni: 0.6%, the amount is Al and unavoidable impurities; the The electroplating layer from the inside to the outside is zinc-coated layer, electroplated nickel layer and the outermost layer of nickel, chromium or copper, in which the zinc-coated layer has a three-layer structure, and the thickness of each layer is about 1-2 μm, and the electroplated nickel layer is The thickness of the outermost layer of nickel, chromium or copper is about 20-30μm; among them, the composition and treatment process of the zinc-coated layer are: sodium hydroxide 60g / L, zinc oxide 60g / L, potassium sodium tartrate 100g / L, ferric chloride 5g / L, sodium nitrate 3g / L; the temperature of precipitating zi...

Embodiment 2

[0017] An aluminum automobile gearbox casing, the gearbox casing is composed of an aluminum alloy base material and an electroplating layer on the outside; the aluminum alloy is composed of the following components by weight percentage: Zn: 9%, Si: 12%, Cu: 8%, Mn: 2%, Ti: 1.2%, Re: 0.3%, Mg: 5%, Zr: 1%, Ni: 0.8%, the balance is Al and unavoidable impurities; the The electroplating layer from the inside to the outside is zinc-coated layer, electroplated nickel layer and the outermost layer of nickel, chromium or copper, in which the zinc-coated layer has a three-layer structure, and the thickness of each layer is about 1-2 μm, and the electroplated nickel layer is The thickness of the outermost layer of nickel, chromium or copper is about 20-30μm; among them, the composition and treatment process of the zinc-coated layer are: sodium hydroxide 80g / L, zinc oxide 40g / L, potassium sodium tartrate 120g / L, ferric chloride 3g / L, sodium nitrate 5g / L; the temperature of precipitating z...

Embodiment 3

[0019] An aluminum automobile gearbox casing, the gearbox casing is composed of an aluminum alloy base material and an electroplating layer on the outside; the aluminum alloy is composed of the following components by weight percentage: Zn: 8%, Si: 13%, Cu: 7%, Mn: 3%, Ti: 1.0%, Re: 0.4%, Mg: 4%, Zr: 2%, Ni: 0.7%, the balance is Al and unavoidable impurities; the The electroplating layer from the inside to the outside is zinc-coated layer, electroplated nickel layer and the outermost layer of nickel, chromium or copper, in which the zinc-coated layer has a three-layer structure, and the thickness of each layer is about 1-2 μm, and the electroplated nickel layer is The thickness of the outermost layer of nickel, chromium or copper is about 20-30μm; among them, the composition and treatment process of the plating solution of the zinc-precipitated layer are: sodium hydroxide 70g / L, zinc oxide 50g / L, potassium sodium tartrate 110g / L, ferric chloride 4g / L, sodium nitrate 4g / L; the ...

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Abstract

The invention discloses an aluminum automobile transmission shell. The transmission shell is composed of an aluminum alloy base material and outer electroplated layers. An aluminum alloy is prepared from, by weight percent, 7% to 9% of Zn, 12% to 14% of Si, 6% to 8% of Cu, 2% to 4% of Mn, 0.8% to 1.2% of Ti, 0.3% to 0.5% of Re, 3% to 5% of Mg, 1% to 3% of Zr, 0.6% to 0.8% of Ni and the balance Al and inevitable impurities. The electroplated layers sequentially comprise the zinc deposition layer, the electronickelling layer and the outermost nickel plating layer or chromium plating layer or copper plating layer from inside to outside. The zinc deposition layer is of a three-layer structure, and the thickness of each layer is about 1-2 micrometers. The thickness of the electronickelling layer is about 4-6 micrometers, and the thickness of the outermost nickel plating layer or chromium plating layer or copper plating layer is about 20-30 micrometers.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an aluminum automobile transmission case. Background technique [0002] Among the output of various metals, my country's aluminum output is second only to steel, and my country is also the world's largest producer of electrolytic aluminum. Aluminum and its alloys have the advantages of high specific strength, good thermal and electrical conductivity, plasticity and easy forming, and have been widely used in various industries. Among them, the gearbox housing made of aluminum has attracted more and more attention and recognition from the market. With the price increase of copper and zinc metals in the market, the profits of products based on zinc and copper in the hardware industry have decreased a lot, while the price of aluminum has risen slowly, and because of the low density of aluminum and its alloys (the density of aluminum is 2.7g / cm 3 ), compared with other commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C25D5/12C25D5/14C25D3/12C23C18/52C23C28/02F16H57/032
CPCC22C21/02C23C18/52C23C28/025C25D3/12C25D5/12C25D5/14F16H57/032F16H2057/02043
Inventor 张颖
Owner 徐州超杰电动车配件有限公司
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