Preparation method of super-plastic magnesium alloy with spherical second phase

A magnesium alloy and superplastic technology, which is applied in the field of rolling of high-performance superplastic magnesium alloys, can solve the problems of difficult to achieve large-size sample preparation and mass production, irregular second phase morphology, easy segregation distribution, etc. Achieve the effect of small size, improve superplastic deformation ability, and round shape

Active Publication Date: 2014-05-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above research is still in the laboratory stage and mainly focuses on the preparation of small-sized samples. It is difficult to realize the preparation and mass production of large-sized samples, and the second phase in the prepared samples has irregular morphology, large size, and easy segregation. distributed

Method used

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  • Preparation method of super-plastic magnesium alloy with spherical second phase
  • Preparation method of super-plastic magnesium alloy with spherical second phase
  • Preparation method of super-plastic magnesium alloy with spherical second phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Pregnancy and deterioration treatment:

[0032] ①The commercial AZ91 magnesium alloy is conventionally melted, and after refining, air blowing purification and slag cleaning, it is kept at a temperature above 660 degrees Celsius to form a commercial magnesium alloy melt;

[0033] ② Put a certain quality of the above commercial magnesium alloy or pure magnesium into another small graphite crucible, heat it to 660-850 degrees Celsius under the protection of argon to melt, add at least one of the trace elements strontium, yttrium, calcium and boron, Blow argon to stir, continue to add at least one of the trace elements tin, tellurium, antimony, bismuth, and phosphorus, blow argon to stir, and make the elements in the melt react fully; the total mass of the added trace elements is the same as that in the graphite crucible. The ratio of the total mass of the melt is less than or equal to 5%;

[0034] ③ According to the ratio of the prepared commercial magnesium alloy me...

Embodiment 2

[0041] (1) Pregnancy and deterioration treatment:

[0042] ①The commercial AZ31 magnesium alloy is conventionally melted, and after refining, air blowing purification and slag cleaning, it is kept at 680 degrees Celsius for heat preservation to form a commercial magnesium alloy melt;

[0043] ② Put a certain quality of the above commercial magnesium alloy or pure magnesium into another small graphite crucible, heat it to 660-850 degrees Celsius under the protection of argon to melt, add at least one of the trace elements strontium, yttrium, calcium and boron, Blow argon to stir, continue to add at least one of trace elements tellurium, antimony, and bismuth, blow argon to stir, and make the elements in the melt react fully; the total mass of the added trace elements is the same as the total mass of the melt in the graphite crucible. ratio is less than or equal to 4%;

[0044]③According to the dilution ratio of the mass of the commercial magnesium alloy melt prepared above to ...

Embodiment 3

[0051] (1) Inoculation and deterioration treatment:

[0052] ①The ZK60 magnesium alloy is conventionally melted, and after refining, gas blowing purification and slag removal treatment, it is kept at a temperature above 660 degrees Celsius to form a commercial magnesium alloy melt;

[0053] ② Put a certain quality of the above-mentioned commercial magnesium alloy or pure magnesium into another small graphite crucible, heat it to 660-850 degrees Celsius under the protection of argon to melt, add at least one of the trace elements strontium, yttrium, and calcium, and blow argon Gas stirring, continue to add at least one of the trace elements tin, tellurium, antimony, bismuth, phosphorus, blowing argon and stirring, so that the elements in the melt fully react; the total mass of the added trace elements is the same as that of the melt in the graphite crucible The ratio of total mass is less than or equal to 5%;

[0054] ③Pour the melt in the graphite crucible containing trace el...

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Abstract

The invention relates to a preparation method of a super-plastic magnesium alloy with a spherical second phase. The preparation method comprises three steps of performing inoculation and deformation treatment on microelements, regulating a deformation process, and balling and re-crystallizing. The preparation method specifically comprises the following steps: diluting and mixing few melts containing microelements to perform inoculation and modification treatment on a magnesium alloy melt; then refining a second phase and a matrix grain; finally, balling and re-crystallizing to prepare a fine grain super-plastic magnesium alloy structure which is provided with the spherical second phase and diffusely distributed in a similarly-spherical matrix grain. The second phase in the structure prepared by the method is small-sized, roundly-shaped and evenly distributed in the grain boundary of the matrix grain. Compared with the conventional irregular and strip-shaped second phase, the super-plastic deformation capability of the material can be significantly improved. The method is capable of preparing large-sized samples, simple, reliable, easy to popularize and use and very applicable to batch production of wide thin plates or thin strip super-plastic magnesium alloys.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a rolling method of a high-performance superplastic magnesium alloy. Background technique [0002] Magnesium alloys have low density, high specific strength and specific stiffness, good electrical and thermal conductivity, good damping and shock absorption, electromagnetic shielding performance, and good regeneration and reuse. favored. Especially in terms of light weight, it has significant advantages that are difficult to replace. However, the poor plastic deformation ability of commonly used magnesium alloys limits its application. Superplastic magnesium alloys have attracted extensive attention in recent years due to their excellent deformation and formability. At present, the preparation methods of superplastic magnesium alloys mainly include: equal diameter angular extrusion, spinning method, rapid sintering method, friction stir modification method, etc. However, the abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06C22C1/02C22C1/03
Inventor 王慧远王珵孟金奎姜启川王金国刘国军
Owner JILIN UNIV
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