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A kind of high plasticity mg-al-ca magnesium alloy and preparation method thereof

A mg-al-ca, magnesium alloy technology, applied in the field of metal materials, can solve the problems of strong plasticity mismatch, poor room temperature plasticity of deformed magnesium alloys, high cost of rare earth magnesium alloys, etc., to improve strength, improve plastic deformation ability, improve Effect of Room Temperature Plasticity and Formability

Active Publication Date: 2021-10-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of poor room temperature plasticity of commercial deformed magnesium alloys, mismatch of strong plasticity and high cost of rare earth magnesium alloys, the invention provides a high plasticity Mg-Al-Ca magnesium alloy and its preparation method

Method used

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  • A kind of high plasticity mg-al-ca magnesium alloy and preparation method thereof
  • A kind of high plasticity mg-al-ca magnesium alloy and preparation method thereof
  • A kind of high plasticity mg-al-ca magnesium alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] High plasticity Mg-2.8Al-1Ca magnesium alloy (the percentage content of each component of the magnesium alloy is Al: 2.8%; Ca: 1%; the balance is Mg and unavoidable impurities ≤ 0.05%). Preparation method:

[0027] (1) Preparation of alloy ingots: According to the composition of the magnesium alloy, pure magnesium, pure aluminum and magnesium-calcium intermediate alloys are smelted at 680 ° C as raw materials, and the smelting process is carried out under protective gas (SF 6 and CO 2 Mixed gas) conditions, after all the raw materials are melted, stir at 680°C for 10 minutes, then stand at 720°C for 10 minutes, and finally pour into a preheated 200°C steel mold, cool to room temperature to obtain an alloy ingot;

[0028] (2) Solution heat treatment: The alloy ingot obtained in step (1) is subjected to three-stage step solution treatment, including: first heating to 400°C, keeping it for 3 hours, then raising the temperature to 465°C for 3 hours, and finally raising the ...

Embodiment 2

[0040] High plasticity Mg-3Al-1.2Ca magnesium alloy (the percentage content of each component of the magnesium alloy is Al: 3%; Ca: 1.2%; the balance is Mg and unavoidable impurities ≤ 0.05%). Preparation method:

[0041] (1) Preparation of alloy ingots: According to the composition of the magnesium alloy, pure magnesium, pure aluminum and magnesium-calcium intermediate alloys are smelted at 690 ° C as raw materials, and the smelting process is carried out under protective gas (SF 6 and CO 2 Mixed gas) conditions, firstly after all the raw materials are melted, stir at 690°C for 8 minutes, then stand at 710°C for 15 minutes, and finally pour into a preheated 225°C steel mold, cool to room temperature to obtain an alloy ingot;

[0042] (2) Solution heat treatment: The alloy ingot obtained in step (1) is subjected to three-stage step solution treatment, including: first heating to 410°C, keeping it for 3 hours, then raising the temperature to 470°C for 3 hours, and finally raisi...

Embodiment 3

[0047] The preparation method of high plasticity Mg-3.1Al-1.5Ca magnesium alloy (the mass percentage content of each component of magnesium alloy is Al: 3.1%; Ca: 1.5%; the balance is Mg and unavoidable impurities ≤ 0.05%):

[0048] (1) Preparation of alloy ingots: according to the composition of the magnesium alloy, pure magnesium, pure aluminum and magnesium-calcium intermediate alloys are smelted at 700 ° C as raw materials, and the smelting process is carried out under protective gas (argon and SF 6 Mixed gas) conditions, after all the raw materials are melted, stir at 700°C for 5 minutes, then stand at 700°C for 20 minutes, and finally pour into a preheated 250°C steel mold, cool to room temperature to obtain an alloy ingot;

[0049] (2) Solution heat treatment: The alloy ingot obtained in step (1) is subjected to three-stage step solution treatment, including: first heating to 420°C, keeping it for 3 hours, then raising the temperature to 475°C for 3 hours, and finally ra...

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Abstract

The invention provides a high-plasticity Mg-Al-Ca magnesium alloy and a preparation method thereof, which belong to the technical field of metal materials. The alloy is composed of Mg, Al and Ca elements; the mass percentage of each component is Al: 2.5-3.5 %, Ca: 0.5-2%, the balance is Mg and unavoidable impurities ≤ 0.05%. The present invention utilizes the method of three-step solid solution to spheroidize the coarse second phase in the as-cast structure; and further refines the second phase in the as-cast structure in combination with multi-pass rotating 90-degree rolling deformation; at the same time, the 90-degree rotating rolling The system will be beneficial to promote the dynamic precipitation of fine submicron Al with high thermal stability in the alloy 2 Ca strengthens the phase and weakens the alloy texture; subsequently, a large number of GP regions and nano-scale Al are formed after a double-stage aging treatment 2 The Ca phase further increases the strength of the alloy without reducing the plasticity. The high plasticity Mg-Al-Ca magnesium alloy prepared by the invention has high yield strength and good elongation at room temperature, wherein the elongation exceeds 20%, and provides a new technical solution for the preparation of magnesium alloys with high Ca content.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-plasticity Mg-Al-Ca magnesium alloy and a preparation method thereof. Background technique [0002] Lightweight and high-performance magnesium alloys can significantly reduce the weight of structural parts, realize the lightweight of manufacturing fields such as automobiles and aerospace, and then meet the needs of green environmental protection, energy conservation and emission reduction. Commercial magnesium alloys such as AZ31 have higher specific strength than most aluminum alloys and steels, but their strong basal texture and anisotropy make the elongation along the extrusion or rolling direction only 10% to 15% , poor formability at room temperature limits its wide application. Therefore, there is an urgent need to develop low-cost wrought magnesium alloys with high ductility at room temperature and suitable for room temperature forming. [0003] Studies ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/03C22F1/06
CPCC22C1/03C22C23/02C22F1/06
Inventor 贾海龙张梦娜周文强查敏王慧远赵磊杨铭朴一男赵海冬
Owner JILIN UNIV
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