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Aluminum alloy for auto parts and die-casting method for auto parts

A technology for auto parts and aluminum alloys, which is applied in the field of die casting of aluminum alloys for auto parts and auto parts, can solve the problems of difficult and precise control of aluminum alloy liquid temperature, shrinkage holes, cracks, etc.

Active Publication Date: 2018-03-09
余姚市弘顺机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to accurately control the temperature of the aluminum alloy liquid during the melting process. If the casting temperature is too high, it is easy to cause pores, shrinkage cavities, and even cracks in the casting, and it will also shorten the life of the metal. Defects such as insufficient or unclear outline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The aluminum alloy of the present embodiment adopts the raw material of following weight ratio:

[0069] Mg: 0.87%;

[0070] Si: 0.4%;

[0071] B: 0.04%;

[0072] Ti: 0.1%;

[0073] Cu: 0.08%;

[0074] Cr: 0.08%;

[0075] Zr: 0.07%;

[0076] Fe: 0.4%;

[0077] Sn: 0.2%;

[0078] CO: 0.03%;

[0079] Sc: 0.08%;

[0080] Hf: 0.07%;

[0081] The remainder consists of Al and unavoidable impurities.

[0082] This embodiment also provides a die-casting method for auto parts, comprising the following steps:

[0083] 1. Heat the pure aluminum ingot to 760°C to melt, and keep the melted aluminum liquid for 35 minutes; fully melt the pure aluminum ingot, then add silicon to the aluminum liquid to melt, then lower the temperature to 700°C, and completely press the magnesium into the in the alloy liquid;

[0084] 2. Raise the temperature to 750°C to remove scum, add the remaining alloy components to the alloy liquid, keep it warm for 45 minutes, then raise the temperatu...

Embodiment 2

[0091] The aluminum alloy of the present embodiment adopts the raw material of following weight ratio:

[0092] Mg: 1.2%;

[0093] Si: 0.45%;

[0094] B: 0.1%;

[0095] Ti: 0.2%;

[0096] Cu: 0.05%;

[0097] Cr: 0.04%;

[0098] Zr: 0.04%;

[0099] Fe: 0.1%;

[0100] Sn: 0.2%;

[0101] Co: 0.07%;

[0102] Sc: 0.08%;

[0103] Hf: 0.02%;

[0104] The remainder consists of Al and unavoidable impurities.

[0105] This embodiment also provides a die-casting method for auto parts, comprising the following steps:

[0106] 1. Heat the pure aluminum ingot to 740°C to melt, and keep the molten aluminum for 40 minutes; fully melt the pure aluminum ingot, then add silicon to the aluminum liquid to melt, then lower the temperature to 650°C, and completely press the magnesium into the in the alloy liquid;

[0107] 2. Raise the temperature to 720°C to remove scum, add the remaining alloy components to the alloy liquid, keep it warm for 50 minutes, then raise the temperature to 85...

Embodiment 3

[0114] The aluminum alloy of the present embodiment adopts the raw material of following weight ratio:

[0115] Mg: 0.8%;

[0116] Si: 0.5%;

[0117] B: 0.05%;

[0118] Ti: 0.12%;

[0119] Cu: 0.15%;

[0120] Cr: 0.1%;

[0121] Zr: 0.1%;

[0122] Fe: 0.1%;

[0123] Sn: 0.4%;

[0124] Co: 0.1%;

[0125] Sc: 0.01%;

[0126] Hf: 0.04%;

[0127] The remainder consists of Al and unavoidable impurities.

[0128] This embodiment also provides a die-casting method for auto parts, comprising the following steps:

[0129] 1. Heat the pure aluminum ingot to 750°C to melt, and keep the molten aluminum for 35 minutes; fully melt the pure aluminum ingot, then add silicon to the aluminum liquid to melt, then lower the temperature to 680°C, and completely press the magnesium into the in the alloy liquid;

[0130] 2. Raise the temperature to 725°C to remove scum, add the remaining alloy components to the alloy liquid, keep it warm for 45 minutes, then raise the temperature to 880°...

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PUM

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Abstract

The invention provides aluminum alloy for an automobile part. The aluminum alloy comprises the following components of Mg, Si, B, Ti, Cu, Cr, Zr, Fe, Sn, Co, Sc, Hf, and the balance Al and unavoidable impurities. Compared with the prior art, the Mg, Si, Cu, Cr and Zr elements are added into the aluminum alloy, so that the strength and toughness of the aluminum alloy are improved effectively; and through the Co, Sc, Hf, Ti and B elements added into the aluminum alloy, a die casting product can generate good grain refinement, the defect of casting cracks is overcome effectively, and the appearance of a casting and the surface quality of a cast ingot are improved. The invention further provides a die casting method for the automobile part, and the aluminum alloy for the automobile part is adopted. According to the aluminum alloy and the die casting method, the casting prepared through die casting, the defects such as pores or shrinkage cavities or misrun or unclear appearance outlines are overcome, and the product yield is high.

Description

technical field [0001] The invention relates to the technical field of die-casting, in particular to an aluminum alloy for auto parts and a die-casting method for the auto parts. Background technique [0002] Aluminum alloys are widely used in the auto parts production industry due to their high tensile strength, good comprehensive mechanical properties of elongation, excellent corrosion resistance and low cost. With the continuous improvement of people's performance requirements for aluminum alloy castings, more and more attention has been paid to how to manufacture aluminum alloy castings with excellent performance for auto parts. [0003] At present, the aluminum alloy in auto parts is usually produced by ordinary die-casting technology, and the die-casting parts of aluminum alloy auto parts produced by ordinary die-casting technology are prone to have pores in the structure, resulting in adverse phenomena, and at the same time, due to the low strength of aluminum alloy p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/06C22F1/047B22D21/00
CPCB22D21/007C22C1/06C22C21/08C22F1/047
Inventor 徐光明
Owner 余姚市弘顺机械有限公司
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