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High-speed extrusion high-strength deforming magnesium alloy and preparation method thereof

A wrought magnesium alloy, high-strength technology, applied in the field of metal materials, can solve the problems of high cost, complex magnesium alloy forming and processing technology equipment, dissolution of the second phase, etc., and achieves low cost, good industrialization prospects, and simple preparation process. Effect

Inactive Publication Date: 2017-01-11
TIANJIN DONGYI MAGNESIUM PROD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the fact that most of the magnesium alloy forming and processing technology equipment is very complicated and expensive, there are certain difficulties in the preparation of magnesium alloys from research to technology transformation.
At present, the high-strength wrought magnesium alloys that have been industrialized are mainly based on Mg-Al series. Due to the high Al content, there are a large number of magnesium-aluminum phases in this type of alloy. These second phases have a lower melting point. During the process, the second phase is easily dissolved, which leads to the cracking of the profile
Because of the above material characteristics, it has the disadvantage that the deformation rate cannot be too fast

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The designed Mg-3Zn-2Sn-1Al-0.3Sr-0.5Mn-0.1Ce-0.00005Be (wt%) takes the required raw materials according to the composition distribution ratio (every 1000g target alloy consists of 30gZn, 20gSn, 10gAl, 3gSr, 10gMg -10Ce master alloy, 0.005gAl-1Be master alloy, 11.5gMnCl 2 And 915.495gMg composition), preparation method comprises the following steps:

[0024] (1) Clean the alloying crucible and preheat the furnace to 300°C, preheat the raw materials used to 80°C, put in pure magnesium ingots and heat up to 700°C to melt into magnesium liquid;

[0025] (2) After the magnesium liquid is heated to 700°C, add 30gZn, 20gSn, 10gAl, 3gSr, 10gMg-10Ce master alloy, 11.5gMnCl in sequence 2 and 0.005g Al-1Be master alloy, MnCl 2 It is granular, with a particle diameter of 1 mm. During the heating process, use a mechanical pump to stir for 20 minutes. During the stirring process, evenly sprinkle RJ-5 magnesium alloy refining agent into the melt. The amount of RJ-5 magnesium alloy ...

Embodiment 2

[0032] The designed Mg-4Zn-3.5Sn-2Al-0.3Sr-0.6Mn-0.2Ce-0.00008Be (wt%) takes the required raw materials according to the composition ratio (per 1000g target alloy consists of 40gZn, 35gSn, 20gAl, 3gSr, 20gMg-10Ce master alloy, 0.008gAl-1Be master alloy, 13.8gMnCl 2 And 868.192gMg composition), preparation method comprises the following steps:

[0033] (1) Clean the alloying crucible and preheat the furnace to 400°C, preheat the raw materials used to 100°C, put in pure magnesium ingots and heat up to 750°C to melt into magnesium liquid;

[0034] (2) After the magnesium liquid is heated to 750°C, add 40gZn, 35gSn, 20gAl, 3gSr, 20gMg-10Ce master alloy, 13.8gMnCl in sequence 2 and 0.008g Al-1Be master alloy, MnCl 2 It is granular and the particle diameter is 2mm. During the heating process, use a mechanical pump to stir for 25 minutes. During the stirring process, evenly sprinkle RJ-5 magnesium alloy refining agent into the melt. The amount of RJ-5 magnesium alloy refining agent...

Embodiment 3

[0041] The designed Mg-5Zn-3.5Sn-2Al-0.3Sr-0.8Mn-0.2Ce-0.0001Be (wt%) takes the required raw materials according to the composition ratio (every 1000g target alloy consists of 50gZn, 35gSn, 20gAl, 3gSr, 20gMg-10Ce master alloy, 0.01gAl-1Be master alloy, 18.4gMnCl 2 And 853.59gMg composition), preparation method comprises the following steps:

[0042] (1) Clean the alloying crucible and preheat the furnace to 500°C, preheat the raw materials used to 100°C, put in pure magnesium ingots and heat up to 800°C to melt into magnesium liquid;

[0043] (2) After the magnesium liquid is heated to 800°C, add 50gZn, 35gSn, 20gAl, 3gSr, 20gMg-10Ce master alloy, 18.4gMnCl in sequence 2 and 0.01g Al-1Be master alloy, MnCl 2 It is granular, with a particle diameter of 3mm. During the heating process, use a mechanical pump to stir for 30 minutes. During the stirring process, evenly sprinkle RJ-5 magnesium alloy refining agent into the melt. The amount of RJ-5 magnesium alloy refining agent i...

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Abstract

The invention discloses a high-speed extrusion high-strength deforming magnesium alloy and a preparation method thereof. The provided magnesium alloy is subjected to high-speed extrusion under the condition of a high extrusion ratio, i.e. the extrusion speed can be more than 25 m / min under the conditions that the extrusion ratio is not less than 30 and the profile size is complicated, thus mainly solving the problem of greatly increased manufacturing cost due to low post-machining deformation rate of the high-strength magnesium alloy. The magnesium alloy finally obtained through extrusion has very high mechanical properties, and is applicable to blanks and the like for 3C (computer, communication, consumer electronics) product shells, leisure product bearing structures and aerospace components. The preparation process of the material is simple and low in cost, and has favorable industrialization prospects.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-speed extruded high-strength deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium and magnesium alloys have the characteristics of low density. Although the mechanical properties of general aluminum alloys are comparable to those of magnesium alloys of the same size, the specific strength and specific stiffness of magnesium alloys are significantly higher than steel and aluminum alloys, and higher than engineering plastics. much. Therefore, magnesium and magnesium alloys have attracted extensive attention due to their low density and other advantages. In today's energy shortage and environmental deterioration, the development and research of magnesium alloy materials has always been a key research direction in the field of metal materials. Developed countries or regions such as the United States, Europe, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22C1/06C22F1/06
CPCC22C23/04C22C1/03C22C1/06C22F1/06
Inventor 赵言辉刘一驰吴稀勇任乃东
Owner TIANJIN DONGYI MAGNESIUM PROD
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