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Preparation method for obtaining compositionally accurate mn-sb-based alloys

A base alloy and accurate technology, applied in the field of Mn-Sb base alloy preparation, can solve the problems of simple metal, slow reaction speed, and insufficient density

Active Publication Date: 2017-08-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sample prepared by this method is not as dense as the sample obtained by smelting, and the reaction speed of the sample is slow, even the reaction amount is extremely small, there is still a simple metal substance, and the required alloy cannot be obtained, so the powder metallurgy method needs to be formed at a higher temperature for the preparation. Alloy samples of compounds are not ideal
However, if the heat treatment temperature of the sample is increased, the volatilization of the sample will increase, which will also cause the deviation of the sample composition.

Method used

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  • Preparation method for obtaining compositionally accurate mn-sb-based alloys
  • Preparation method for obtaining compositionally accurate mn-sb-based alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Ball milling raw material

[0020] Weigh each raw metal powder Co powder, Mn powder, and Sb powder (purity is 99.99wt.%, particle size is less than 200 mesh) according to the measurement (see Table 1), mix them and put them into a ball mill tank and inject a sufficient amount of argon Gas is used as a protective gas to ensure that the gas in the tank is all argon, and then the ball milling tank is sealed, and a planetary ball mill is used for ball milling at a speed of 450 rpm for 30 hours; making a compact

[0021] Press the metal powder after ball milling in step with a tablet press (pressure 14MPa) into a dense cylindrical compact; prepare the alloy

[0022] Put the compact made in step into a quartz tube, and vacuumize the quartz tube (10 -3 Pa), heat up to 650°C at a rate of 20°C / min, hold for 48 hours, then heat up to 1000°C, hold for 240 hours, then slowly drop to 500°C for 72 hours, and finally quench to room temperature, that is, Alloy No. 1 sample.

[0...

Embodiment 2

[0025] Ball milling raw material

[0026] Basically with embodiment 1.

[0027] Making briquettes

[0028] Basically with embodiment 1.

[0029] Alloy preparation

[0030] Put the compact made in step into a quartz tube, and vacuumize the quartz tube (10 -3 Pa), heat up to 750°C at a rate of 5°C / min, hold for 48 hours, then heat up to 1000°C, hold for 240 hours, then slowly drop to 500°C for 72 hours, and finally quench to room temperature, that is, Alloy No. 4 sample.

[0031] Prepare No. 5 and No. 6 alloy samples in the same way.

Embodiment 3

[0033] Ball milling raw material

[0034] Basically with embodiment 1.

[0035] Making briquettes

[0036] Basically with embodiment 1.

[0037] Alloy preparation

[0038] Put the compact made in step into a quartz tube, and vacuumize the quartz tube (10 -3 Pa), heat up to 400°C at a rate of 40°C / min, hold for 72 hours, then heat up to 1000°C, hold for 192 hours, then slowly drop to 500°C for 72 hours, and finally quench to room temperature, that is, Alloy No. 7 sample.

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Abstract

The invention discloses a preparation method for obtaining an accurate-composition Mn-Sb-based alloy. The method comprises the steps of firstly carrying out ball milling on raw material metals (Mn, Sb and rare earth RE or a high-melting-point element M) powder and then pressing into a billet with a certain shape, size, porosity and strength and then making into a multicomponent system alloy RE-Mn-Sb or M-Mn-Sb with a certain chemical element by virtue of powder metallurgy. The components of the final alloy prepared by the method are basically consistent with the preset target components (the deviation is less than 3%), the components are uniform, the density is relatively high, and the structural performances of the alloy are also enhanced and improved as desired by virtue of different heat treatment processes. Since China has rich rare earth resources and Sb mineral resources, rare earth and Sb mineral resources can be efficiently utilized by virtue of popularizing and applying the preparation method disclosed by the invention, which brings good economic benefits and meanwhile the basic requirements of enterprises on metal alloy products can also be met.

Description

technical field [0001] The invention belongs to the technical field of Mn-Sb-based alloys, and in particular relates to a method for preparing Mn-Sb-based alloys with accurate composition. Background technique [0002] my country is the world's largest producer of rare earths, and its conservative reserves of rare earths rank first in the world. Due to their unique atomic structure, rare earth elements have peculiar electrical, magnetic, and optical properties. They are widely used in rare earth permanent magnet materials, superconducting materials, rare earth luminescent materials, magneto-optical storage materials, and magnetostrictive materials. They are cutting-edge Essential trace elements in the field of science and technology. With the rapid development of modern science and technology, people have higher and higher requirements for material performance, especially metal alloy materials, which are the decisive factors that change and determine the performance of mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C22/00
Inventor 何维姚路杨通晗陈国坚
Owner GUANGXI UNIV