Automobile reduction gearbox casing and preparation process of casing

A reduction box and housing technology, applied in the field of automobile manufacturing, can solve the problems of application limitations, poor plasticity of alloys, poor high temperature strength and creep resistance, etc., and achieve the effect of microstructure improvement

Active Publication Date: 2013-01-09
山东银光钰源轻金属精密成型有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to their poor high-temperature strength, creep resistance, and poor corrosion resistance, they cannot be used in automotive power system components that require high high-temperature creep performance, and have been used only for some non-critical auto parts. , such as steering wheels, steering column components, instrument panels, seats, and gearboxes, etc., their application in major power systems such as automotive gearboxes and engine housings has been greatly restricted
[0006] The heat-resistant magnesium alloys Mg-Al-Ca (AX) and Mg-Al-Sr (AJ) alloys currently developed with the addition of alkaline earth elements have the disadvantages of high hot cracking sensitivity and poor alloy plasticity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An automobile gear box housing, which is prepared according to the following method:

[0025] 1) Raw material composition: (percentage by weight): 0.2% yttrium, 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, and the rest is magnesium;

[0026] 2) Raw material processing: Take magnesium metal according to the above weight ratio, and under the protection of argon gas, melt the magnesium metal and heat it up to 750°C to obtain Mg melt; take other metal raw materials according to the above weight ratio, and put them in a high-energy ball mill tank After mixing and ball milling for 3 hours, the mixed powder of metal raw materials was obtained;

[0027] 3) Melting: Start the resistance melting furnace, put the mixed powder obtained in step 2) into a crucible preheated to 350°C, and pass it into SF when the temperature rises to 700°C 6 and N 2 Mixed protective gas, the volume ratio of the mixed gas is SF 6 and N 2 =1:200; After the ...

Embodiment 2

[0032] The yttrium metal and titanium metal in the raw materials are removed, and other raw materials and preparation processes remain unchanged.

Embodiment 3

[0034] The cerium metal and lanthanum metal in the raw materials are removed, and other raw materials and preparation processes remain unchanged.

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PUM

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Abstract

The invention discloses an automobile reduction gearbox casing. The casing comprises 0.2% of yttrium, 0.06% of titanium, 0.05% of cerium, 0.05% of lanthanum, 0.02% of samarium, 0.5% of zinc, 2% of manganese, and the balance being magnesium. The invention also discloses a preparation method of the automobile reduction gearbox casing. The automobile reduction gearbox casing is excellent in breaking strength, hardness, creep resistance and corrosion resistance and has good market application value.

Description

[0001] technical field [0002] The invention relates to an automobile gearbox shell and a preparation process thereof, belonging to the technical field of automobile manufacturing. [0003] Background technique [0004] In the fierce competition of the world's automobile industry, all automobile manufacturers are developing in the direction of high quality, high reliability, light weight, energy saving and low cost. In terms of materials, it is characterized by light weight, damping and shock absorption, and corrosion resistance. Magnesium alloy materials are used to replace some steel (iron) parts and aluminum alloys to meet the requirements of high-quality and low-cost development of automobiles. At present, my country's automotive gearbox housing materials have low yield, low utilization rate of resources and energy, poor high temperature strength and creep resistance, poor corrosion resistance, and cannot be used to cope with the ever-changing development of automotive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/032C22C23/00C22C1/02B22D17/00C22F1/06
Inventor 郭朝贵王守泰刘夫真王前进王飞
Owner 山东银光钰源轻金属精密成型有限公司
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