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Squeeze casting preparation method for magnalium automobile engine support

A technology for automobile engines and magnesium-aluminum alloys, which is applied in the preparation of automobile engine brackets and the field of extrusion casting preparation of magnesium-aluminum alloy automobile engine brackets, can solve problems such as unsatisfactory mechanical properties, and achieve economic benefits, fine grains, and Effect of reducing machining allowance

Inactive Publication Date: 2017-05-10
过冬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical properties still cannot meet the needs of practical applications and need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a magnesium-aluminum alloy automobile engine bracket by squeeze casting, said method comprising the steps of:

[0029] (1) The weight percent of the raw material components of magnesium alloy is: 3.5% Si, 1.8% Fe, 1% Ti, 0.25% Cu, 0.01% Mn, 15.5% Mg, Zn<0.1%, Ni<0.05%, Pb <0.05%, Sn<0.05%, and the rest is Al.

[0030] (2) When the prepared magnesium-aluminum alloy raw material components are heated up to 320°C in an oven, the crucible melting furnace is heated up at the same time, and a layer of covering agent is sprinkled on the bottom of the crucible melting furnace, and the preheated magnesium-aluminum alloy raw material is Components are added to the crucible melting furnace;

[0031] (3) When continuing to heat up to 600 DEG C, start to feed argon, and the flow rate of argon is 5% / min of the crucible melting furnace solvent;

[0032] (4) After the magnesium-aluminum alloy raw material components are completely melted, continue to heat up to...

Embodiment 2

[0041] A method for preparing a magnesium-aluminum alloy automobile engine bracket by squeeze casting, said method comprising the steps of:

[0042] (1) The weight percent of the raw material components of magnesium and aluminum alloys is: 5.5% Si, 2% Fe, 1.2% Ti, 0.15% Cu, 0.05% Mn, 10.2% Mg, Zn<0.1%, Ni<0.05%, Pb <0.05%, Sn<0.05%, and the rest is Al.

[0043] (2) When the configured magnesium-aluminum alloy raw material components are heated to 345°C in an oven, the crucible melting furnace is heated up at the same time, and a layer of covering agent is sprinkled on the bottom of the crucible melting furnace, and the preheated magnesium-aluminum alloy raw material is Components are added to the crucible melting furnace;

[0044] (3) When continuing to heat up to 500° C., start to feed argon, and the flow rate of argon is 8% / min of the crucible melting furnace solvent;

[0045] (4) After the magnesium-aluminum alloy raw material components are completely melted, continue to...

Embodiment 3

[0053] A method for preparing a magnesium-aluminum alloy automobile engine bracket by squeeze casting, said method comprising the steps of:

[0054] (1) The weight percent of the raw material components of magnesium and aluminum alloys is: 4.5% Si, 1.7% Fe, 1.1% Ti, 0.18% Cu, 0.02% Mn, 13.5% Mg, Zn<0.1%, Ni<0.05%, Pb <0.05%, Sn<0.05%, and the rest is Al.

[0055] (2) When the configured magnesium-aluminum alloy raw material components are heated to 336°C in an oven, the crucible melting furnace is heated up at the same time, and a layer of covering agent is sprinkled on the bottom of the crucible melting furnace, and the preheated magnesium-aluminum alloy raw material is Components are added to the crucible melting furnace;

[0056] (3) When continuing to heat up to 550 DEG C, start to feed argon, and the flow rate of argon is 6.5% / min of the crucible melting furnace solvent;

[0057] (4) After the magnesium-aluminum alloy raw material components are completely melted, conti...

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Abstract

The invention relates to a squeeze casting preparation method for a magnalium automobile engine support. Magnalium comprises the following raw material components by weight percent: 3.5-5.5% of Si, 1-2.5% of Fe, 0.5-2% of Ti, 0.15-0.25% of Cu, 0.01-0.05% of Mn, 10.2-15.5% of Mg, less than 0.1% of Zn, less than 0.05% of Ni, less than 0.05% of Pb, less than 0.05% of Sn and the balance of Al, wherein Fe / Ti is more than 1 and less than 2. The squeeze casting preparation method comprises the following steps: preheating the raw material components at 320-345 DEG C, and then, adding into a heated crucible melting furnace; and continually heating to 500-600 DEG C, then pumping in argon, after that, heating to 760-780 DEG C, transferring into a crane ladle, performing heat preservation, refining, casting, and then conducting solution and aging strengthening to obtain the automobile engine support with superior mechanical property. The prepared automobile engine support has the tensile strength of 320 MPa or above and the yield strength of 100-110 MPa.

Description

technical field [0001] The invention relates to a method for preparing an automobile engine bracket, in particular to a method for preparing a magnesium-aluminum alloy automobile engine bracket by squeeze casting. It belongs to the technical field of alloy manufacturing. Background technique [0002] In the fierce competition in the world automobile market, all countries are developing in the direction of high quality, high reliability, light weight, energy saving and low cost. In terms of materials, it is lightweight, replacing some steel (iron) parts with aluminum alloys, in order to meet the requirements of high-quality, low-cost development of automobiles; in terms of technology, it is scientific, using advanced technology to replace traditional technology to achieve The purpose of improving blank precision, reducing machining allowance, reducing raw material consumption, and reducing cost. To further expand the application of aluminum alloy materials in automobile str...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/02C22C1/06B22D18/02C22F1/047
CPCC22C21/08B22D18/02C22C1/026C22C1/06C22F1/047
Inventor 过冬
Owner 过冬
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