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Al-Cu-Mg-Ag alloy and preparation method and application thereof

An al-cu-mg-ag, alloy technology, which is applied in the field of non-ferrous metal material alloying and its preparation, can solve the problem of high production cost, achieve low requirements for production equipment, excellent strength performance, and simple and easy-to-operate production process. Effect

Pending Publication Date: 2022-08-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high Ag content (1-1.5% by weight), the production cost is still high

Method used

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  • Al-Cu-Mg-Ag alloy and preparation method and application thereof
  • Al-Cu-Mg-Ag alloy and preparation method and application thereof
  • Al-Cu-Mg-Ag alloy and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The alloy composition was prepared according to the 1# sample shown in the alloy composition table of the following Table 1, smelted at 750° C., and subjected to on-line degassing and slag removal and semi-continuous casting treatment to obtain an ingot. The ingot is subjected to two-stage homogenization heat treatment, and the specific process is as follows: firstly, the ingot is kept at 410°C for 18h, and then at 485°C for 48h. The homogenized heat-treated material is extruded into rod-shaped profiles at 400°C, and then subjected to solution aging treatment. The specific process is as follows: the solution system is kept at 520°C for 2 hours, and the aging system is kept at 165°C for 32 hours.

[0042] The obtained 1# alloy was tested for strength, including room temperature mechanical property test, mechanical property test under high temperature conditions of 160°C and 200°C, and mechanical property test after thermal exposure under high temperature conditions of 160...

Embodiment 2

[0044] The alloy composition was prepared according to the 2# sample shown in the alloy composition table of the following Table 1, smelted at 750° C., and subjected to in-line degassing and slag removal and semi-continuous casting treatment to obtain an ingot. The ingot is subjected to two-stage homogenization heat treatment, and the specific process is as follows: firstly, the ingot is kept at 410°C for 18h, and then at 485°C for 48h. The homogenized heat-treated material was hot-extruded into a rod-shaped profile at 400 °C, and then subjected to solution aging treatment. The specific process was: the solution system was kept at 520 °C for 2 hours, and the aging system was maintained at 165 °C for 32 hours.

[0045] The obtained 2# alloy was tested for strength, including room temperature mechanical property test, mechanical property test under high temperature conditions of 160°C and 200°C, and mechanical property test after thermal exposure under high temperature conditions...

Embodiment 3

[0047] The alloy composition was prepared according to the 3# sample shown in the alloy composition table of the following Table 1, smelted at 750° C., and subjected to in-line degassing and slag removal and semi-continuous casting treatment to obtain an ingot. The ingot is subjected to two-stage homogenization heat treatment, and the specific process is as follows: firstly, the ingot is kept at 410°C for 18h, and then at 485°C for 48h. The homogenized heat-treated material is extruded into rod-shaped profiles at 400 °C, and then subjected to solution aging treatment. The specific process is as follows: the solution system is kept at 520 °C for 2 hours, and the aging system is maintained at 165 °C for 12 hours.

[0048] The obtained 3# alloy was subjected to strength tests, including room temperature mechanical property test, mechanical property test under high temperature conditions of 160°C and 200°C, and mechanical property test after thermal exposure under high temperature ...

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Abstract

The invention discloses an Al-Cu-Mg-Ag alloy as well as a preparation method and application of the Al-Cu-Mg-Ag alloy. The Al-Cu-Mg-Ag alloy comprises, by weight, 6%-6.8% of Cu, 0.46%-0.7% of Mg, 0.15%-0.3% of Ag, 0.3%-0.6% of Mn, 0.05%-0.15% of Zr, 0.1%-0.2% of Ti and the balance Al and inevitable impurities, and the weight ratio of Mg to Ag in the alloy is larger than or equal to 1.5 and smaller than or equal to 4.5. According to the Al-Cu-Mg-Ag alloy provided by the invention, the content of Ag is reduced, the content of Mg is increased, the weight ratio of Mg to Ag is within a proper range, and the weight ratio of other elements in the alloy is controlled, so that the Al-Cu-Mg-Ag alloy can have relatively high room-temperature and high-temperature strength performance while the production cost is reduced; the high-strength aluminum alloy has excellent strength performance especially under the high-temperature condition, the preparation method is simple, the number of steps in the production process is small, the requirement for production equipment is low, the preparation method can be carried out on original traditional aluminum alloy production equipment, and the good market application prospect and popularization value are achieved.

Description

technical field [0001] The invention relates to the technical field of alloying of non-ferrous metal materials and its preparation, in particular to an Al-Cu-Mg-Ag alloy and a preparation method and application thereof. Background technique [0002] 2xxx series (Al-Cu) aluminum alloys, as a kind of high-strength and heat-resistant aluminum alloy materials, are widely used in aerospace, transportation and other fields. Among them, Al-Cu-Mg-Ag, as one of the 2xxx series alloys, can precipitate the Ω phase, and the Ω phase can exist stably for a long time at 200 °C without coarsening or agglomeration. Ag alloy has considerable thermal strength at 200°C or even above 200°C. [0003] At present, it is generally used to change the content of alloying elements and optimize the heat treatment process to improve the thermal strength of the aluminum alloy material itself. [0004] CN1556235A discloses an aluminum-copper-magnesium-silver series high-strength cast heat-resistant alumi...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22C1/02C22F1/057
CPCC22C21/16C22C1/026C22F1/057
Inventor 阮臣良魏辽吴晋霞刘奔朱敏涛刘志义颜鹏飞贾鹏翔曹靖
Owner CHINA PETROLEUM & CHEM CORP
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