Preparation method for high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy

A magnesium-zinc-manganese-yttrium and high-plasticity technology is applied in the field of preparation of high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloys, which can solve the problems of increasing the use cost of the alloy, ineffective strengthening effect, and restricting the application of magnesium alloys, thereby increasing energy consumption. , the effect of eliminating macrosegregation and improving plasticity

Active Publication Date: 2017-05-31
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, adding rare earth elements to magnesium alloys is a relatively effective method to improve the strength, but adding too little rare earth elements will not have a prominent strengthening effect, and adding too much rare earth elements will greatly increase the cost of the alloy. At the same time, it will also form in the alloy. Bulky compounds that seriously reduce the plasticity of the alloy
In addition, the conventional plastic deformation process cannot obtain sufficiently high-strength and plastic magnesium alloys, and the large plastic deformation process requires high equipment, which will also limit the application of magnesium alloys to a certain extent.

Method used

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  • Preparation method for high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy
  • Preparation method for high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy
  • Preparation method for high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare magnesium-zinc-manganese-yttrium alloy as follows

[0030] (1) Melting: Melt the magnesium ingot and the magnesium-manganese master alloy together at 690°C, then add the zinc ingot and the magnesium-yttrium master alloy. After removing the slag, let it stand until the impurities settle, and cast it semi-continuously at 680°C to produce a semi-continuous ingot;

[0031] (2) Extrusion treatment: heat the semi-continuous ingot prepared in step (1) to 500° C. for 12 hours, then keep it warm for 14 hours, then cool it to 25° C., and perform rolling, and finally preheat the rolled ingot for 1 hour, According to the extrusion ratio of 30 and extrusion molding at 400°C, a magnesium-zinc-manganese-yttrium alloy is obtained. In terms of mass percentage, the prepared magnesium-zinc-manganese-yttrium alloy includes the following components: Zn: 2.2%, Mn: 0.5%, Avoid impurity ≤ 0.15%, the rest is magnesium.

Embodiment 2

[0033] Prepare magnesium-zinc-manganese-yttrium alloy as follows

[0034] (1) Melting: Melt the magnesium ingot and the magnesium-manganese master alloy together at 710°C, then add the zinc ingot and the magnesium-yttrium master alloy. After 25 minutes, argon gas is introduced for 15 minutes. After removing the slag, let it stand until the impurities settle, and then cast semi-continuously at 685°C to produce a semi-continuous ingot;

[0035] (2) Extrusion treatment: heat up the semi-continuous ingot prepared in step (1) to 500°C for 6 hours, then keep it warm for 16 hours, then cool it to 30°C, and perform rolling, and finally preheat the rolled ingot for 1 hour, According to the extrusion ratio of 16 and extrusion molding at 430°C, a magnesium-zinc-manganese-yttrium alloy is obtained. In terms of mass percentage, the prepared magnesium-zinc-manganese-yttrium alloy includes the following components: Zn: 2.5%, Mn: 1.2%, Y : 0.8%, unavoidable impurities ≤ 0.15%, the rest is ma...

Embodiment 3

[0037] Prepare magnesium-zinc-manganese-yttrium alloy as follows

[0038] (1) Melting: Melt the magnesium ingot and the magnesium-manganese master alloy together at 700°C, then add the zinc ingot and the magnesium-yttrium master alloy, and after 20 minutes, pass in argon gas for 20 minutes. After removing the slag, let it stand until the impurities settle, and cast it semi-continuously at 675°C to produce a semi-continuous ingot;

[0039] (2) Extrusion treatment: heat up the semi-continuous ingot prepared in step (1) to 500°C for 9 hours, then keep it warm for 12 hours, then cool it to 30°C, and carry out rolling, and finally preheat the rolled ingot for 1.5 hours , according to the extrusion ratio of 25 at 450 ° C, the obtained magnesium-zinc-manganese-yttrium alloy, in terms of mass percentage, the prepared magnesium-zinc-manganese-yttrium alloy includes the following components: Zn: 0.8%, Mn: 1.5%, Y: 1.8%, unavoidable impurities ≤ 0.15%, the rest is magnesium.

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Abstract

The invention relates to a preparation method for a high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy and belongs to the technical field of production of a magnesium alloy of nonferrous metal. The preparation method specifically comprises the following steps that (1) smelting is conducted, specifically, a magnesium ingot and a magnesium-manganese master alloy are smelted together, a zinc ingot and a magnesium-yttrium master alloy are added, and after 20-30 min, argon is introduced for 10-20 min, finally, an alloy melt is subjected to deslagging and stood till impurities settle, and semicontinuous casting is conducted to prepare a semicontinuous cast ingot; and (2) extrusion treatment is conducted, specifically, the prepared semicontinuous cast ingot is subjected to homogenization treatment, then cooled to 25-30 DEG C and subjected to sheet turning, and finally, the cast ingot subjected to sheet turning is subjected to extrusion forming according to the extrusion ratio of 16:30 at 400-450 DEG C to prepare the magnesium-zinc-manganese-yttrium alloy. By adoption of the preparation method, the mechanical performance and the plasticity of the alloy can be simultaneously improved, and the use range of the magnesium alloy is effectively enlarged, and the magnesium alloy can replace some zirconium-containing and rare-earth-containing magnesium alloy materials and can be applied to aerospace, military and industrial fields and the like.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy production in nonferrous metals, and in particular relates to a preparation method of a high-strength and high-plasticity magnesium-zinc-manganese-yttrium alloy. Background technique [0002] Magnesium alloy is the lightest commercial metal structure material. Conventional magnesium alloy is 30-50% lighter than aluminum alloy and more than 70% lighter than steel, which can greatly reduce the weight of structural parts. Magnesium alloys have excellent comprehensive properties and are especially suitable for lightweight structural parts. However, the low strength and low plasticity of magnesium alloys limit their application range as structural materials. At present, the strength and plasticity of the magnesium alloy are generally improved by adding alloy elements to the magnesium alloy or performing plastic deformation treatment on the magnesium alloy. Among them, adding rare earth element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C23/06C22C23/00C22C1/03
CPCC22C1/03C22C23/00C22C23/04C22C23/06
Inventor 胥钧耀张丁非潘复生余大亮陈蓉于媛媛冯靖凯伍华怡
Owner CHONGQING UNIV
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