High-strength cast aluminum alloy for automobile

A casting aluminum alloy, high-strength technology, applied in the field of aluminum alloy material research, can solve the problems affecting the mechanical properties of casting parts, coarse primary silicon and eutectic silicon phase, and the inability to manufacture shape parts, etc., to eliminate microscopic shrinkage porosity , refine the grain, eliminate the effect of macroscopic shrinkage cavity

Active Publication Date: 2021-03-12
安徽军明机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-silicon aluminum alloys (silicon content greater than 17%) are prone to form coarse primary silicon and eutectic silicon phases during casting due to their high silicon conten

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] A high-strength cast aluminum alloy with a car contains 11%, Cu accounts for 3.7%, and Zn accounts for 0.08%, MN accounts for 0.3%, V06%, ZR, ZR 0.09%, Ti accounted for 0.06%, RE element accounted for 0.02%, remaining AL and inevitable impurities; the main preparation techniques include the following steps:

[0018] (1) Place the alloy prepared raw material in the electric resistance furnace for smelting: Clean each raw material is smoked, after drying, first adding Al, Mg, all dissolved, and then add Ti, Cu, Zn, Mn, Zr, After all melting, finally, the V, RE element and Si are added, and after all the stove is melted, the argon is introduced into the refining, the refining time is 11 minutes, and the refining is slightly stirred, and the temperature is allowed to 810 ° C, and the slag after 5 minutes after standing;

[0019] (2) Pouring the alloy melt of refined refined to the preheated mold cavity, the casting temperature is 745 ° C, performing extrusion...

Example Embodiment

[0026] Example 2

[0027] A high-strength cast aluminum alloy with automobiles contains 12%, Cu accounts for 3.8%, Zn accounts for 0.09%, and MN accounts for 0.35%, VR account for 0.07%. 0.10%, Ti accounted for 0.07%, RE element accounted for 0.025%, the remaining Al and inevitable impurities; the main preparation techniques include the following steps:

[0028] (1) Place the alloy prepared raw material in the electric resistance furnace for smelting: Clean each raw material is smoked, after drying, first adding Al, Mg, all dissolved, and then add Ti, Cu, Zn, Mn, Zr, After all melting, finally, the V, RE element and Si are added. After all of the stove is all melted, the argon is introduced into the refining, the refining time is 11-13 minutes, and the refining is slightly stirred, and the temperature is allowed to 813 ° C, and then allowed for 6.5 minutes Slag;

[0029] (2) Pouring the alloy melt of refined refined into the preheated mold cavity, the casting temperature is 750 ° ...

Example Embodiment

[0036] Example 3

[0037] High-strength cast aluminum alloy with automobiles containing the following elements in mass: Si accounts for 4.0%, Cu accounted for 0.48%, Mg accounted for 0.4%, MN accounted for 0.08%, ZR 0.12%, Ti accounted for 0.08%, RE element accounted for 0.03%, remaining Al and inevitable impurities; the main preparation techniques include the following steps:

[0038](1) Place the alloy prepared raw material in the electric resistance furnace for smelting: Clean each raw material is smoked, after drying, first adding Al, Mg, all dissolved, and then add Ti, Cu, Zn, Mn, Zr, After all melting, finally, the V, RE element and Si are added, and after all the stove is melted, the argon is introduced into the refining, the refining time is 13 minutes, and the refinery is slightly stirred, and the temperature is allowed to 817 ° C, and the slag after 8 minutes after standing;

[0039] (2) Pour the alloy melt obtained from refined into the preheated mold cavity, the castin...

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Abstract

The invention relates to the technical field of aluminum alloy material research, and discloses a high-strength cast aluminum alloy for an automobile. The content of each element in a silicon-aluminumalloy is adjusted, and the adverse effect of the silicon element on the alloy is eliminated; moreover, the effects of the conditions such as temperature and pressure on the microstructure and mechanical properties of a casting are controlled by utilizing an extrusion casting process; in the casting process, macroscopic shrinkage cavities and microscopic shrinkage porosity are remarkably eliminated, and crystal grains are refined; in the heat treatment process, the mechanical properties of the casting are further enhanced, and the strength of the casting is remarkably improved; and the tensilestrength reaches 375-380 MPa, the elongation reaches 12.7-13.0%, and the hardness reaches 126-128 HB. According to the high-strength cast aluminum alloy for the automobile, the problems that shrinkage cavities and shrinkage porosity occur in the casting process of a high-silicon aluminum alloy, and the crystal grains are coarse in the prior art can be solved, parts with complex properties can bemanufactured, the surface quality of the parts is high, the process is simple and efficient, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of research on aluminum alloy materials, and in particular relates to a high-strength cast aluminum alloy for automobiles. Background technique [0002] Due to the light weight, high strength and good toughness of aluminum alloy, many auto parts at home and abroad are made of aluminum alloy materials. Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, aluminum alloy and chemical industry. Because of their good physical and chemical properties, aluminum and aluminum alloys have been widely used in marine industry, power system and aviation and other fields. [0003] With the development of the automobile manufacturing industry, the proportion of aluminum alloy materials is increasing year by year. In order to improve the wear resistance and heat resistance of the aluminu...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02B22D18/02C22F1/043
CPCC22C21/02C22C1/026B22D18/02C22F1/043C22F1/002
Inventor 王辅成
Owner 安徽军明机械制造有限公司
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