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A kind of multi-component heat-resistant magnesium alloy and its preparation method

A magnesium alloy and heat-resistant technology, which is applied in the field of multi-component heat-resistant magnesium alloy and its preparation, can solve the problem of high alloy cost and achieve the effect of good mechanical properties and creep resistance.

Active Publication Date: 2015-09-09
佛山市欧朗德建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, even these applied heat-resistant magnesium alloys are limited in varying degrees due to their own problems.
For example, AE42 alloy and WE43 alloy contain high content of RE (>2.5%) and / or noble metal elements such as Y and Th, and the cost of the alloy is relatively high. It is currently only used in high-performance engines such as racing cars, and has not Widely used in automobiles

Method used

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  • A kind of multi-component heat-resistant magnesium alloy and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A multi-component heat-resistant magnesium alloy, containing: Gd: 0.55%, Al: 3.4%, Zn: 1.75%, Si: 4.2%, Ca: 0.93%, Sr: 1.02%, Nd: 0.88%, Zr : 0.17%, Sn: 1.6%, Be: 0.18%, Mn: 0.76%, Sb: 0.13%, Cu: 0.59%, and the balance is Mg; the preparation method of the heat-resistant magnesium alloy comprises the following steps:

[0018] (1) Raw material preparation: raw material preparation is carried out according to weight percentage content, and described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr Master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;

[0019] (2) Melting: The alloy is smelted in a resistance furnace with a protective gas atmosphere. The smelting temperature is 750°C. First, pure Mg ingots are added to the melting furnace. After the pure magnesium ingots are completely melted, Mg-Gd intermediate alloys and pur...

Embodiment 2

[0026] A multi-component heat-resistant magnesium alloy, containing: Gd: 0.68%, Al: 3.54%, Zn: 1.82%, Si: 4.44%, Ca: 0.96%, Sr: 1.07%, Nd: 0.98%, Zr : 0.23%, Sn: 1.7%, Be: 0.175%, Mn: 0.89%, Sb: 0.145%, Cu: 0.67%, and the balance is Mg;

[0027] The preparation method of the heat-resistant magnesium alloy comprises the following steps:

[0028] (1) Raw material preparation: raw material preparation is carried out according to weight percentage content, and described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr Master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;

[0029] (2) Melting: The alloy is smelted in a resistance furnace with a protective gas atmosphere. The smelting temperature is 745-770°C. First, pure Mg ingots are added to the smelting furnace. After the pure magnesium ingots are completely melted, Mg-Gd intermed...

Embodiment 3

[0036] A multi-component heat-resistant magnesium alloy, containing Gd: 0.65%, Al: 3.55%, Zn: 1.85%, Si: 4.25%, Ca: 0.96%, Sr: 1.05%, Nd: 0.9%, Zr: 0.24%, Sn: 1.6%, Be: 0.18%, Mn: 0.85%, Sb: 0.13%, Cu: 0.75%, and the balance is Mg.

[0037] The preparation method of the heat-resistant magnesium alloy comprises the following steps:

[0038] (1) Raw material preparation: raw material preparation is carried out according to weight percentage content, and described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr Master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;

[0039] (2) Melting: The alloy is smelted in a resistance furnace with a protective gas atmosphere. The smelting temperature is 750°C. First, pure Mg ingots are added to the melting furnace. After the pure magnesium ingots are completely melted, Mg-Gd intermediate alloy...

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Abstract

The invention provides a multi-element heat-resistant magnesium alloy which comprises the following components in percentage by weight: 0.5-0.7% of Gd, 3.35-3.6% of Al, 1.7-1.95% of Zn, 4.0-5.0% of Si, 0.9-1.0% of Ca, 1.0-1.1% of Sr, 0.8-1.0% of Nd, 0.1-0.3% of Zr, 1-2% of Sn, 0.15-0.20% of Be, 0.7-1.0% of Mn, 0.1-0.15% of Sb, 0.5-0.8% of Cu and the balance of Mg. The alloy has good mechanical properties and creep resistance.

Description

technical field [0001] The invention belongs to the field of heat-resistant magnesium alloy materials, in particular to a multi-element heat-resistant magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest commercial metal engineering structural material, magnesium alloy is known as the "21st century" because of its light specific gravity, high specific strength and specific stiffness, strong damping and vibration reduction, excellent liquid forming performance and easy recycling. Green Structural Materials". However, at present, due to the poor high-temperature creep resistance of existing magnesium alloys, the long-term working temperature cannot exceed 120°C, making it impossible to be used in the manufacture of automotive engines and other transmission parts that require high-temperature creep performance, thus greatly hindering the development of magnesium alloys. Further applications of the alloy. It is precisely because of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
Inventor 张霞
Owner 佛山市欧朗德建材有限公司