Die casting aluminum alloy with high strength and toughness as well as preparation method thereof

A technology of casting aluminum alloy and tough pressing, which is applied in the field of high-strength and tough die-casting aluminum alloy and its preparation, can solve the problems of low pass rate, high cost consumption, and lengthened process flow, etc., and achieve good die-casting performance and meet performance requirements.

Active Publication Date: 2019-06-14
SHANGHAI WANTAI AUTO PARTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain good mechanical properties, the alloy needs to adopt high vacuum and heat treatment process, which makes the whole process longer, costly and low pass rate.

Method used

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  • Die casting aluminum alloy with high strength and toughness as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The weight percent of each component of a high-strength and toughness die-casting aluminum alloy in this embodiment is: Si: 10.0wt%; Mg: 0.3wt%; Mn: 0.6wt%; Sr: 0.04wt%; Zn: 1.0wt%; RE : 0.1wt%; Fe: w(Fe)≤0.16wt%; the remaining impurities are less than or equal to 0.25%, and the balance is Al.

[0027] A method for preparing a high-strength and toughness die-casting aluminum alloy in this embodiment includes the following steps:

[0028] (1) Drying: Preheat the prepared raw materials of pure aluminum ingot, industrial silicon, pure magnesium block, aluminum strontium alloy, pure zinc block, aluminum manganese alloy and aluminum rare earth alloy to 200°C for drying treatment;

[0029] (2) Melting: Use a crucible resistance furnace for smelting, first preheat the resistance furnace to 200°C, and then evenly coat the inner wall of the crucible with paint; after drying, first melt the weighed pure aluminum, and wait for the pure aluminum After melting, raise the temperatur...

Embodiment 2

[0032] The weight percent of each component of a high-strength and toughness die-casting aluminum alloy in this embodiment is: Si: 10.0wt%; Mg: 0.3wt%; Mn: 0.6wt%; Sr: 0.04wt%; Zn: 1.5wt%; RE : 0.1wt%; Fe: w(Fe)≤0.16wt%; the remaining impurities are less than or equal to 0.25%, and the balance is Al.

[0033] A method for preparing a high-strength and toughness die-casting aluminum alloy in this embodiment includes the following steps:

[0034] (1) Drying: Preheat the prepared raw materials of pure aluminum ingot, industrial silicon, pure magnesium block, aluminum-strontium alloy, pure zinc block and aluminum-manganese alloy to 200°C for drying treatment;

[0035] (2) Melting: Use a crucible resistance furnace for smelting, first preheat the resistance furnace to 200°C, and then evenly coat the inner wall of the crucible with paint; after drying, first melt the weighed pure aluminum, and wait for the pure aluminum After melting, heat up to 780°C, add industrial silicon that h...

Embodiment 3

[0038] The weight percent of each component of a high-strength and tough die-casting aluminum alloy in this embodiment is: Si: 10.0wt%; Mg: 0.3wt%; Mn: 0.6wt%; Sr: 0.04%; Zn: 2.5wt%; RE: 0.1wt%; Fe: w(Fe)≤0.16wt%; the total amount of other impurities is less than or equal to 0.25%, and the balance is Al.

[0039] A method for preparing a high-strength and toughness die-casting aluminum alloy in this embodiment includes the following steps:

[0040] (1) Drying: Preheat the prepared raw materials of pure aluminum ingots, industrial silicon, pure magnesium blocks, aluminum strontium alloys, aluminum rare earth alloys and aluminum manganese alloys to 200°C for drying treatment;

[0041] (2) Melting: Use a crucible resistance furnace for smelting, first preheat the resistance furnace to 200°C, and then evenly coat the inner wall of the crucible with paint; after drying, first melt the weighed pure aluminum, and wait for the pure aluminum After melting, raise the temperature to 780°C...

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Abstract

The invention relates to die casting aluminum alloy with high strength and toughness and a preparation method thereof. The die casting aluminum alloy with the high strength and toughness is prepared from the following components in percentage by weight: 9.0 percent to 11.0 percent of Si, 0.1 percent to 0.5 percent of Mg, 0.5 percent to 0.8 percent of Mn, 50ppm to 400ppm of Sr, 1.0 percent to 3.0 percent of Zn, 0.05 percent to 0.35 percent of Re, and less than or equal to 0.16 percent of Fe, less than or equal to 0.25 percent of other impurities, and the balance of Al. According to the Al-Si-Mn-Mg series die casting aluminum alloy, an enhancing element Zn is added, and modification is carried out by adopting an Sr / rare earth compound modifying agent, so that tissues of the alloy is improved, and the die casting aluminum alloy with high strength and high toughness, of which the yield strength is up to 160MPa, the tensile strength is up to 270MPa and an elongation ratio is up to 7 percent, can be obtained under die casting and non-heat treatment states; and moreover, the die casting aluminum alloy has high die casting performance, and application demands of parts in automobile industries can be greatly met.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-strength and tough die-casting aluminum alloy and a preparation method thereof. Background technique [0002] Compared with heavier materials in automobiles, such as steel or copper, aluminum has the characteristics of high strength-to-weight ratio, good formability, good corrosion resistance, and recycling potential, making it an ideal material to meet the needs of lightweight vehicles. ideal choice. Die casting technology is a common casting technology for aluminum alloys in automobiles. According to the composition, die casting aluminum alloys can be divided into Al-Si series, Al-Si-Mg series, Al-Si-Mn-Mg series, Al-Si-Cu series, Al-Mg series and Al-Zn series. In automobiles, the application of die-cast aluminum alloys can be divided into the following four categories according to their functions: engine and auxiliary systems, powertrain, interior and electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03B22D17/00
Inventor 彭立明韩盼文袁灵洋郑飞燕徐宏胡志恒应伟勇
Owner SHANGHAI WANTAI AUTO PARTS
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