Method for preparing high-strength and toughness magnesium alloy containing LPSO structure through magnetic field casting regulation

A tough magnesium alloy and magnesium alloy technology, which is applied in the field of magnetic field casting to control the preparation of high-strength and tough magnesium alloys containing LPSO structure, can solve the problem of not preparing nano-scale LPSO structure, and achieve the optimization of melting process, high efficiency, and improved strength and plasticity. Effect

Active Publication Date: 2017-12-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above documents [1-6] and patents have prepared nanoscale LPSO structures

Method used

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  • Method for preparing high-strength and toughness magnesium alloy containing LPSO structure through magnetic field casting regulation
  • Method for preparing high-strength and toughness magnesium alloy containing LPSO structure through magnetic field casting regulation
  • Method for preparing high-strength and toughness magnesium alloy containing LPSO structure through magnetic field casting regulation

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Experimental program
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Effect test

Embodiment 1

[0047] This embodiment provides a method for preparing a high-strength and tough magnesium alloy containing LPSO structure controlled by magnetic field casting, and specifically adopts the following steps:

[0048] 1) Use pure magnesium (Mg purity greater than or equal to 99.95%), Mg-20Gd (mass percentage) master alloy, pure zinc (Zn purity greater than or equal to 99.99%), according to Mg-1Gd-1Zn (atomic percentage) alloy composition distribution Ratio (reasonable impurities are not considered, when selecting raw materials, raw materials with less impurities should be selected as much as possible).

[0049] 2) The crucible used in the experiment needs to be cleaned in advance until there is no obvious residue attached to the wall and bottom of the crucible, and the stirring spoon and skimming spoon required for the experiment should be brushed and dried upside down. Mix a certain amount of talcum powder, water glass and water together to make a viscous paint, and then evenly ...

Embodiment 2

[0057] This embodiment provides a method for preparing a high-strength and tough magnesium alloy containing LPSO structure controlled by magnetic field casting, and specifically adopts the following steps:

[0058] 1) Using pure magnesium (Mg purity greater than or equal to 99.95%), Mg-50Gd (mass percentage) master alloy, pure zinc (Zn purity greater than or equal to 99.99%), according to Mg-2.5Gd-1Zn (atomic percentage) alloy composition Distribution ratio (reasonable impurities are not considered, when selecting raw materials, raw materials with less impurities should be selected as much as possible).

[0059] 2) The crucible used in the experiment needs to be cleaned in advance until there is no obvious residue attached to the wall and bottom of the crucible, and the stirring spoon and skimming spoon required for the experiment should be brushed and dried upside down. Mix a certain amount of talcum powder, water glass and water together to make a viscous paint, and then eve...

Embodiment 3

[0067] This embodiment provides a method for preparing a high-strength and tough magnesium alloy containing LPSO structure controlled by magnetic field casting, and specifically adopts the following steps:

[0068] 1) Using pure magnesium (Mg purity greater than or equal to 99.95%), Mg-90Gd (mass fraction) master alloy, pure zinc (Zn purity greater than or equal to 99.99%), according to Mg-2.67Gd-0.43Zn (atomic percentage) alloy Composition ratio (reasonable impurities are not considered, when selecting raw materials, raw materials with less impurities should be selected as much as possible).

[0069] 2) The crucible used in the experiment needs to be cleaned in advance until there is no obvious residue attached to the wall and bottom of the crucible, and the stirring spoon and skimming spoon required for the experiment should be brushed and dried upside down. Mix a certain amount of talcum powder, water glass and water together to make a viscous paint, and then evenly brush a...

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Abstract

The invention provides a method for preparing high-strength and toughness magnesium alloy containing an LPSO structure through magnetic field casting regulation. The method comprises the following steps: atoms RE and atoms Zn are proportioned in a certain amount of Mg-Re-Zn alloy, and the Mg-Re-Zn alloys are put into a crucible at a certain temperature for melting; after all the alloy raw materials are molten, the molten materials are heated to 700-740deg C and is casted into a graphite mould under a magnetic field condition, and a Mg-RE-Zn casting ingot is obtained; and the Mg-RE-Zn casting ingot is subjected to solid solution and then subjected to quenching treatment, and a magnetic field casting Mg-RE-Zn alloy with a nano-scale lamellar LPSO structure is obtained. The structure of the alloy is regulated by changing the current and frequency of the pulsed magnetic field during casting the molten alloy in the specially-made graphite mould and the temperature and time of the subsequent solid solution treatment, and the nano-scale lamellar LPSO structure of the high-toughness magnesium alloy is prepared in the Mg-RE-Zn casting alloy for the first time.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a method for preparing a high-strength and tough magnesium alloy containing an LPSO structure controlled by magnetic field casting. Background technique [0002] At present, magnesium alloys have made outstanding progress in commercial applications, but due to factors such as easy corrosion, poor plasticity, and low strength and toughness, they cannot be widely used and promoted. To change this situation, certain measures must be taken. At present, the significant aging strengthening effect of Mg-RE magnesium alloy has aroused people's interest, and more and more rare earth magnesium alloys have been developed. After 1970, by Rokhlin et al. ([1] Liu Guanghua. Rare earth materials and application technology [M]. Chemical Industry Press, 2005; [2] Guo Xutao, Li Peijie, Zeng Daben, etc., rare earth in heat-resistant magnesium alloy Effect, Rare Earth, 2002,23(2):63-67) foun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06B22D27/02C22F1/06
CPCB22D27/02C22C23/06C22F1/002C22F1/06
Inventor 吴玉娟衡相文彭立明容伟赵倩陈娟丁文江
Owner SHANGHAI JIAO TONG UNIV
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