Automotive transmission case and manufacturing method thereof

A technology of automobile gearbox and manufacturing method, which is applied in the fields of alloy heat treatment and automobile parts manufacturing, can solve the problems of increased automobile weight, difficulty in meeting tensile strength, fatigue strength and wear resistance, increased energy consumption, etc., and achieve comprehensive performance Improve and ensure the effect of overall performance requirements

Inactive Publication Date: 2015-04-29
邯郸市宝特铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then it is used for its high density, which leads to an increase in the weight of the entire car, thereby increasing energy consumption. With the improvement of environmental protection awareness in recent years, it is required to reduce the weight of the car in general
[0003] The specific gravity of aluminum alloy is only about 1 / 3 of that of steel plate, so it is more and more used in the field of automobile parts, but for automobile gearbox shells, the existing aluminum alloy materials are difficult to meet its high tensile strength. Requirements for comprehensive mechanical properties such as strength, fatigue strength and wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The selected aluminum alloys are: Si: 6.6%, Ti: 2.9%, Zn: 2.0%, Cu: 0.29%, Mg: 0.95%, rare earth: 0.09%, and the balance is Al and unavoidable impurities.

[0028] The manufacturing steps are:

[0029] 1) Mold preparation: use CAD image design tools to design and mold the mold of the automobile gearbox housing casting. The mold is symmetrically distributed with one mold and two cavities. The mold is fixed on the extrusion casting machine and the mold is preheated to 250°C, and then evenly spray a layer of release agent in the mold cavity. The thickness of the release agent coating is 25 microns. After the coating is stable and uniform, continue to heat the mold to 390°C and keep it warm for use.

[0030] 2) Material preparation: Prepare the aluminum-silicon alloy, and distribute the raw materials according to the required composition. The aluminum is made of pure aluminum ingots, and the other raw materials are made of aluminum-titanium master alloy, aluminum-zinc maste...

Embodiment 2

[0038] The selected aluminum alloys are: Si: 6.8%, Ti: 3.0%, Zn: 2.2%, Cu: 0.30%, Mg: 0.98%, rare earth: 0.11%, and the balance is Al and unavoidable impurities.

[0039] The manufacturing steps are:

[0040] 1) Mold preparation: use CAD image design tools to design and mold the mold of the automobile gearbox housing casting. The mold is symmetrically distributed with one mold and two cavities. The mold is fixed on the extrusion casting machine and the mold is preheated to 258°C, and then evenly spray a layer of release agent in the mold cavity. The thickness of the release agent coating is 26 microns. After the coating is stable and uniform, continue to heat the mold to 395°C and keep it warm for use.

[0041] 2) Material preparation: Prepare the aluminum-silicon alloy, and distribute the raw materials according to the required composition. The aluminum is made of pure aluminum ingots, and the other raw materials are made of aluminum-titanium master alloy, aluminum-zinc maste...

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Abstract

The invention relates to an automotive transmission case and a manufacturing method thereof. The automotive transmission case with high strength and high tenacity is obtained by preparing a mold for a specific component magnesium alloy; preparing materials, smelting, extruding and casting; quenching, carrying out cryogenic treatment, tempering and carrying out aging treatment.

Description

technical field [0001] The invention belongs to the field of alloy heat treatment and the field of automobile parts manufacturing, in particular to an automobile gearbox casing and a manufacturing method thereof. Background technique [0002] In the field of auto parts, steel plates are widely used because of their high strength, good mechanical properties, and good formability. Then it is used for its high density, which leads to an increase in the weight of the entire car, thereby increasing energy consumption. With the improvement of environmental protection awareness in recent years, it is required to reduce the weight of the car in general. [0003] The specific gravity of aluminum alloy is only about 1 / 3 of that of steel plate, so it is more and more used in the field of automobile parts, but for automobile gearbox shells, the existing aluminum alloy materials are difficult to meet its high tensile strength. Requirements for comprehensive mechanical properties such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/043B22D18/02C22C21/02C22C1/03F16H57/02
Inventor 王文姣
Owner 邯郸市宝特铸造有限公司
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