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High-toughness cast aluminum alloy and heat treatment process and preparation method thereof

A casting aluminum alloy, high-strength technology, applied in casting equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor toughness and low material strength, and achieve the effects of uniform distribution, fine grain, high strength and elongation

Active Publication Date: 2022-03-29
上海交通大学四川研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a high-strength, high-toughness cast aluminum alloy to solve the problems of low strength and poor toughness of the aluminum alloy material in the prior art

Method used

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  • High-toughness cast aluminum alloy and heat treatment process and preparation method thereof
  • High-toughness cast aluminum alloy and heat treatment process and preparation method thereof
  • High-toughness cast aluminum alloy and heat treatment process and preparation method thereof

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Embodiment 1

[0044] The percentage by weight of each component of a high-strength and tough cast aluminum alloy in this embodiment is: Si: 6.0%, Cu: 1.5%, Mg: 0.4%, Zn: 0.6%, Ti: 0.2%, Cr: 0.15%, Zr : 0.1%, Re: 0.25%, Sr: 0.02%, Fe: 0.15%; the sum of other impurities is less than 0.15%, and the balance is Al.

[0045] A heat treatment process and preparation method of a high-strength and toughness cast aluminum alloy in this embodiment includes the following steps:

[0046] 1) Material preparation: According to the set chemical composition, weigh industrial pure aluminum, Al-Si20 master alloy, pure magnesium, pure zinc, Al-50Cu master alloy, Al-20Fe master alloy, Al-10Zr master alloy, Al-10Cr master alloy, Al-5Ti master alloy, Al-Sr master alloy, Al-Re master alloy, aluminum deslagging and degassing refining agent, etc., after drying the above alloys and raw materials, they are ready for use;

[0047] 2) Melting aluminum ingots: Put the industrially pure aluminum ingots preheated to 150°C...

Embodiment 4

[0059] The percentage by weight of each component of a high-strength and tough cast aluminum alloy in this embodiment is: Si: 7.0%, Cu: 2%, Mg: 0.3%, Zn: 0.8%, Ti: 0.2%, Cr: 0.25%, Zr : 0.2%, Re: 0.3%, Sr: 0.04%, Fe: 0.15%; the sum of other impurities is less than 0.15%, and the balance is Al.

[0060]A method for preparing a high-strength and tough cast aluminum alloy of the present embodiment includes the following steps:

[0061] 1) Material preparation: According to the set chemical composition, weigh industrial pure aluminum, Al-Si20 master alloy, pure magnesium, pure zinc, Al-50Cu master alloy, Al-20Fe master alloy, Al-10Zr master alloy, Al-10Cr master alloy, Al-5Ti master alloy, Al-Sr master alloy, Al-Re master alloy, aluminum slag and degassing refining agent, etc., the above alloys and raw materials are dried and used for later use;

[0062] 2) Melting aluminum ingots: Put the industrial pure aluminum ingots preheated to 150°C into the melting furnace for melting, th...

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Abstract

The invention discloses a high-toughness cast aluminum alloy as well as a heat treatment process and a preparation method thereof. The aluminum alloy comprises the following components in percentage by weight: 5 to 8.5 percent of Si, 1 to 3 percent of Cu, 0.3 to 0.5 percent of Mg, 0.5 to 1.0 percent of Zn, 0.1 to 0.2 percent of Fe, 0.1 to 0.3 percent of Ti, 0.1 to 0.3 percent of Cr, 0.1 to 0.3 percent of Zr, 0.02 to 0.06 percent of Sr, 0.2 to 0.4 percent of mischmetal Re, no more than 0.15 percent of other inevitable impurity elements in total and the balance of aluminum. The aluminum alloy is subjected to special treatment through the solid solution and aging heat treatment process, the obtained aluminum alloy has ultrahigh strength and toughness, the yield strength of the aluminum alloy exceeds 350 MPa, the tensile strength of the aluminum alloy exceeds 400 MPa, the ductility of the aluminum alloy is larger than 3%, and the problems that an existing aluminum alloy is low in strength and poor in toughness can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-strength and toughness cast aluminum alloy and its heat treatment process and preparation method. Background technique [0002] In recent years, many countries and regions around the world have put forward a clear goal of "carbon neutrality". In 2020, my country also proposed "strive to peak carbon dioxide emissions before 2030, and strive to achieve carbon neutrality before 2060." The goal. In this context, accelerating "decarbonization" has become a major trend in the auto industry, and vigorously developing new energy vehicles has also become the consensus of auto companies. One of the ways for the automotive industry to achieve "carbon neutrality" is to use lightweight technology to reduce fuel consumption or electricity consumption per kilometer. Among them, replacing traditional steel components with aluminum alloy components is the core of lightweight vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22F1/043B22D37/00C22B9/02C22B9/05
CPCC22C21/04C22C1/026C22C1/03C22F1/043C22F1/002B22D37/00C22B9/023C22B9/05Y02P10/20
Inventor 孙自来宋成猛钟海
Owner 上海交通大学四川研究院
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