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Method for improving mechanical performance of aluminum alloy die pressed casting

A technology of mechanical properties and aluminum alloys, applied in the field of aluminum alloy casting, can solve the problems of low mechanical properties, restrict the development of high-speed and high-power automobiles, etc., to improve strength and yield limit, ensure density, and improve mechanical properties. performance effect

Inactive Publication Date: 2018-03-06
GUANGDONG HONGTUNANTONGDIE CASTING
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Problems solved by technology

[0003] Among the die-casting aluminum alloys of auto parts, A380 aluminum alloy is usually used for processing, but its mechanical properties are not high, which limits the development of high-speed and high-power automobiles

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  • Method for improving mechanical performance of aluminum alloy die pressed casting
  • Method for improving mechanical performance of aluminum alloy die pressed casting

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with specific embodiment:

[0013] A method for improving the mechanical properties of an aluminum alloy die casting, the method comprising the steps of:

[0014] Aluminum alloy melting:

[0015] According to the ratio of alloying elements Si 9%~9.5%, Fe 0.8%~0.9%, Cu 3.6%~4%, Mn 0%~0.5%, Mg0.25%~0.3%, Cr 0%~0.15%, Ni 0 %~0.5%, Zn 0%~0.1%, Ti 0.1%~0.2%, Pb 0%~0.1%, Sn0%~0.15% and the balance Al, put the raw materials into the mixer for stirring;

[0016] Nitrogen is introduced during the stirring process, and the nitrogen passing time is controlled to be more than 8 minutes, and the vent holes are ensured to penetrate during the nitrogen passing process, and at the same time, the distance between the cleaning agitator and the bottom of the refining bag is ≤100mm during the stirring process; when the humidity is less than 85%, control the speed 500-540rpm / min; when the humidity is greater than or equa...

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Abstract

The invention discloses a method for improving mechanical performance of an aluminum alloy die pressed casting. The method comprises the following steps: pressing molten aluminum alloy into a die under high pressure exceeding 80 MPa; and condensing in the die to obtain the aluminum alloy die pressed casting, wherein the boosting distance in the die pressing process is controlled to be 680mm; the boosting flow is 70; the die pressing filling process costs 40-60ms; the molten aluminum alloy comprises the following components in parts by weight: 9-9.5% of Si, 0.8-0.9% of Fe, 3.6-4% of Cu, 0-0.5%of Mn, 0.25-0.3% of Mg, 0-0.15% of Cr, 0-0.5% of Ni, 0-0.1% of Zn, 0.1-0.2% of Ti, 0-0.1% of Pb, 0-0.15% of Sn, and the balance Al.

Description

technical field [0001] The invention relates to a method for improving the mechanical properties of an aluminum alloy die casting, which belongs to the field of aluminum alloy casting. Background technique [0002] Aluminum alloy is an alloy composed of aluminum and other elements. It is the most commonly used material in structural engineering. It has small specific gravity, good heat transfer, good electrical conductivity, environmental protection, and recyclable recycling. It is widely used in 3C, automobiles Various fields such as transportation, home furnishing, aerospace, chemical industry, rocket, etc. According to the processing method, aluminum alloy can be divided into two categories: deformed aluminum alloy and cast aluminum alloy. Aluminum alloys can be divided into aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-zinc alloys, and aluminum-rare-earth alloys according to their chemical composition. Die-casting is a method of po...

Claims

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Application Information

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IPC IPC(8): C22C21/02B22D17/00
Inventor 赵郁鎏康阳洋杨其锐安玉山
Owner GUANGDONG HONGTUNANTONGDIE CASTING
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