Preparation method of magnesium-rare earth series alloy spectral standard sample

The technology of rare earth alloy and spectral standard sample is applied in the field of preparation of magnesium-rare earth alloy spectral standard sample. , The effect of low production cost

Inactive Publication Date: 2019-07-19
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to solve the problems of serious segregation, complicated preparation and high preparation cost of existing magnesium-rare earth alloy standard samples, and to provide a preparation of magnesium-rare earth alloy standard samples The method can prepare a homogeneous magnesium-rare earth alloy standard sample, and the preparation cycle is short and the preparation cost is low

Method used

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  • Preparation method of magnesium-rare earth series alloy spectral standard sample
  • Preparation method of magnesium-rare earth series alloy spectral standard sample
  • Preparation method of magnesium-rare earth series alloy spectral standard sample

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Mg-8Gd (wt.%) binary alloy spectral standard sample

[0032] 1. Preparation of Mg-8Gd spectral standard sample

[0033] S1. Melting and casting a magnesium-rare earth alloy to obtain four Mg-8Gd binary alloy ingots with a diameter of Ф47 mm and a depth of 12 mm. Specific steps are as follows:

[0034] a. Prepare magnesium alloy and magnesium-rare earth master alloy according to the ratio of magnesium-rare earth alloy. When preparing pure magnesium ingots and Mg-20Gd (wt.%) intermediate alloy charge, the burning loss rate of Gd element should be considered reasonably when batching the ingredients. According to experience, the burning loss rate of Gd element is 8%.

[0035] b. First melt the pure magnesium ingot at 740°C and keep it warm for 20 minutes, then add the Mg-20Gd master alloy ingot into the pure magnesium melt and make the surface of the melt be covered with the master alloy material to prevent its oxidation and burning. Adjust the heating temp...

Embodiment 2

[0052] Embodiment 2: Mg-15Gd (wt.%) binary alloy spectral standard sample

[0053] 1. Preparation of Mg-15Gd spectral standard sample

[0054] S1. Melting and casting a magnesium-rare earth alloy to obtain four Mg-15Gd binary alloy ingots with a diameter of Ф47 mm and a depth of 12 mm. Specific steps are as follows:

[0055] a. Prepare magnesium alloy and magnesium-rare earth master alloy according to the ratio of magnesium-rare earth alloy. When preparing pure magnesium ingots and Mg-20Gd (wt.%) intermediate alloy charge, the burning loss rate of Gd element should be considered reasonably when batching the ingredients. According to experience, the burning loss rate of Gd element is 8%.

[0056] b. First melt the pure magnesium ingot at 760°C and keep it warm for 30 minutes, then add the Mg-20Gd master alloy ingot into the pure magnesium melt and make the surface of the melt be covered with the master alloy material to prevent its oxidation and burning. Adjust the heating t...

Embodiment 3

[0073] Embodiment 3: Mg-10Dy (wt.%) binary alloy spectral standard sample

[0074] 1. Preparation of Mg-10Dy spectral standard sample

[0075] S1. Melting and casting a magnesium-rare earth alloy to obtain four Mg-10Dy binary alloy ingots with a diameter of Ф47 mm and a depth of 12 mm. Specific steps are as follows:

[0076] a. Prepare magnesium alloy and magnesium-rare earth master alloy according to the ratio of magnesium-rare earth alloy. When preparing pure magnesium ingots and Mg-20Dy (wt.%) intermediate alloy charge, the burning loss rate of Dy element should be considered reasonably when batching ingredients, and the burning loss rate of Dy element should be 8% according to experience.

[0077] b. First melt the pure magnesium ingot at 740°C and keep it warm for 20 minutes, then add the Mg-20Dy master alloy ingot into the pure magnesium melt and make the surface of the melt be covered with the master alloy material to prevent its oxidation and burning. Adjust the hea...

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Abstract

The invention relates to a preparation method of a magnesium-rare earth series alloy spectral standard sample. The preparation method is characterized in that firstly homogeneous magnesium-rare earthalloy ingots with small sizes are prepared by solidifying under the condition of rapid cooling and are connected by diffusion welding to obtain a sample meeting the shape and size requirements, then the homogenization degree of the sample is increased through homogenization heat treatment, and finally the sample is finished to obtain the spectral standard sample. The preparation method specifically comprises the following steps that S1, a magnesium-rare earth alloy is smelted and cast to obtain a plurality of ingots with the same size; S2, the ingots are machined, the upper surfaces and the lower surfaces of the ingots are bonded and put in a vacuum diffusion furnace for the diffusion welding to obtain the sample; S3, the sample is placed into a heat treatment furnace for homogenization treatment; and S4, the homogenized sample is subjected to finish machining into the standard sample size, and marked with a number to obtain the spectral standard sample. The homogeneous magnesium-rareearth alloy standard sample can be prepared, the preparation period is short and the preparation cost is low.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method for preparing a magnesium-rare earth alloy spectral standard sample. Background technique [0002] Due to important advantages such as high specific strength and good heat resistance, magnesium-rare earth (Mg-RE) series alloys have been widely used in the field of weight reduction of important equipment such as aerospace and transportation. However, the density of RE elements, especially heavy rare earth elements, is usually higher (taking Gd as an example, its density is 7.9g / cm 3 ). As the lightest structural metal material, Mg has a density of only 1.74g / cm 3 , so severe specific gravity segregation usually occurs in as-cast Mg-RE alloys. At the same time, RE elements are also prone to dendrite segregation in magnesium alloys to form continuous and coarse eutectic structures, and it is difficult to completely eliminate them in the subsequent solution treatment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06G01N1/36G01N21/25B23K20/00
CPCB23K20/001C22C1/03C22C23/06C22F1/06G01N1/36G01N21/25G01N2001/2893G01N2001/366
Inventor 游国强童鑫宰乐徐轩曦
Owner CHONGQING UNIV
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