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Method for manufacturing aluminum automobile gearbox shell

A technology of automobile gearbox and manufacturing method, which is applied in the field of metallurgy, can solve problems such as high scrap rate, unstable performance, air bubbles, etc., and achieve the effect of good bonding layer performance, performance improvement, and tight bonding

Inactive Publication Date: 2016-05-25
株洲立众精制科技有限公司
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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

[0026] A method for manufacturing an aluminum automobile gearbox housing, which is made of an aluminum alloy consisting 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 balance is Al and unavoidable impurities; the preparation method includes the following steps:

[0027] 1) Ingredients: According to the above ingredients, select the corresponding elemental raw material or the intermediate alloy with aluminum;

[0028] 2) Smelting: melting the raw materials prepared in step 1) at 770°C, refining and refining, and then keeping the temperature at about 740°C for pouring;

[0029] 3) Prepare the mold: preheat the mold to 240°C, and then evenly spray a layer of release agent with heat insulation and heat preservation functions in the mold cavity, and the coating thickness is 30 microns;

[0030] 4) Die-casting: The casting process parameters are: extrusion pressure 130MPa, holding time 60s, filli...

Embodiment 2

[0038] A method of manufacturing an aluminum automobile gearbox housing, which is made of an aluminum alloy consisting 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%, and the balance is Al and unavoidable impurities; the preparation method includes the following steps:

[0039] 1) Ingredients: According to the above ingredients, select the corresponding elemental raw material or the intermediate alloy with aluminum;

[0040] 2) Melting: melting the raw material prepared in step 1) at 790°C, refining and refining, and then keeping the temperature at about 720°C for pouring;

[0041] 3) Prepare the mold: preheat the mold to 260°C, and then evenly spray a layer of release agent with heat insulation and heat preservation functions in the mold cavity, and the coating thickness is 25 microns;

[0042] 4) Die-casting: The casting process parameters are: extrusion pressure 150MPa, holding time 50s, fill...

Embodiment 3

[0050] A method of manufacturing an aluminum automobile gearbox housing, which is made of an aluminum alloy consisting 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%, and the balance is Al and unavoidable impurities; the preparation method includes the following steps:

[0051] 1) Ingredients: According to the above ingredients, select the corresponding elemental raw material or the intermediate alloy with aluminum;

[0052] 2) Smelting: melting the raw materials prepared in step 1) at 780°C, refining and refining, and then keeping the temperature at about 730°C for pouring;

[0053] 3) Prepare the mold: preheat the mold to 250°C, and then evenly spray a layer of release agent with heat insulation and heat preservation functions in the mold cavity, and the coating thickness is 28 microns;

[0054] 4) Die casting: The casting process parameters are: extrusion pressure 140MPa, pressure holding tim...

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PUM

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Abstract

The invention discloses a method for manufacturing an aluminum automobile gearbox shell. The gearbox shell is manufactured from aluminum alloy prepared from, by weight, 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 manufacturing method comprises the following steps of 1 batching, 2 smelting, 3 mold preparation, 4 die casting, 5 thermal treatment and 6 electroplating. An electroplating method comprises the steps of 1 pretreatment, 2 zinc depositing treatment, 3 electronickelling treatment and 4 surface layer nickel or chromium or copper plating.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for manufacturing an aluminum automobile gearbox casing. 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 ), compar...

Claims

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Application Information

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IPC IPC(8): C22C21/02B22D17/00C22F1/043C25D5/12C25D3/22C25D3/12
CPCB22D17/00C22C21/02C22F1/043C25D3/12C25D3/22C25D5/12
Inventor 张颖
Owner 株洲立众精制科技有限公司
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