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A kind of preparation method along the thickness direction gradient material and the application of preparation magnesium alloy

A gradient material and thickness direction technology, applied in the field of gradient material preparation, can solve problems such as slow deposition speed, loose voids, uneven coating structure, etc., and achieve the effects of simple production equipment, reduced production cost, and simplified production process

Active Publication Date: 2021-07-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of functionally graded materials by powder metallurgy has problems such as complex procedures and high costs
The preparation of functionally graded materials by plasma spraying method has disadvantages such as low bonding strength between the gradient coating and the substrate, uneven coating structure, loose cavities, and rough surface.
The preparation of functionally graded materials by laser cladding method has problems such as complex and expensive preparation process and equipment
The preparation of functionally graded materials by vapor deposition method has a slow deposition rate, cannot continuously control the composition distribution, and cannot prepare large-thickness bulk materials

Method used

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  • A kind of preparation method along the thickness direction gradient material and the application of preparation magnesium alloy
  • A kind of preparation method along the thickness direction gradient material and the application of preparation magnesium alloy
  • A kind of preparation method along the thickness direction gradient material and the application of preparation magnesium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) The substrate used in the experiment is a pure magnesium plate with a purity of 99.95%, and the functionally graded composition elements are selected as aluminum and zinc. The spherical aluminum powder used in the experiment has an average particle size of 22 μm and a purity of 99.85%; the spherical zinc powder has a particle size of 37 μm and a purity of 99.9%. Put aluminum powder and zinc powder into a mechanical powder mixer at a mass ratio of 3:1, and mix for 1 hour.

[0066] (2) Prefabricated round holes on the pure magnesium substrate: the hole diameter is 1.5mm, the depth is 1mm, and the distance between the round holes is 7mm. The surface is cleaned with acetone to remove oil, and the aluminum-zinc mixed powder is added to the injection powder loading device to complete the loading of the metal powder.

[0067] Select the aperture size and hole spacing according to the size of the mixing head: the aperture is R k 1.5mm, hole spacing is L k 7mm; the densit...

Embodiment 2

[0075] (1) The substrate used in the experiment is a pure magnesium plate with a purity of 99.95%, and the functionally graded composition elements are selected as aluminum and zinc. The spherical aluminum powder used in the experiment has an average particle size of 22 μm and a purity of 99.85%; the spherical zinc powder has a particle size of 37 μm and a purity of 99.9%. Put aluminum powder and zinc powder into a mechanical powder mixer at a mass ratio of 3:1, and mix for 1 hour.

[0076] (2) Prefabricated round holes on the pure magnesium substrate: the hole diameter is 3mm, the depth is 1mm, and the distance between the round holes is 7mm. The surface is cleaned with acetone to remove oil, and the aluminum-zinc mixed powder is added to the injection powder loading device to complete the loading of the metal powder.

[0077] (3) After the powder addition to the metal substrate is completed, the metal substrate is delivered to the friction stir machine, and the dynamic comp...

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Abstract

The invention discloses a method for preparing a gradient material along the thickness direction and the application of preparing a magnesium alloy, which comprises arranging holes on a metal plate to be processed, filling the holes with pre-alloyed metal powder, and stirring the holes on the surface of the metal plate Friction processing, so that the metal plate to be processed presents a temperature gradient along the thickness from the surface with holes to the surface without holes, and the temperature of the surface with holes is higher than that of the surface without holes; the invention regulates the upper surface and the lower surface during the processing The cooling rate is poor, so that the temperature field of the metal plate to be processed changes in a gradient along the thickness direction, thereby realizing the preparation of gradient materials; according to the actual needs of the project, the present invention presets the type of pure metal powder required for the alloying of the metal plate to be processed and its Matching.

Description

technical field [0001] The invention proposes a preparation method of a gradient material, and in particular relates to a preparation method of a gradient material along the thickness direction and an application for preparing a magnesium alloy. Background technique [0002] Functionally gradient materials (Functionally gradient materials, FGM) refer to the continuous changes in the composition, structure, physical parameters and physical, chemical and other single or composite properties, so that the properties and functions of the materials also change in gradients to adapt to different environments and achieve A new type of composite material with a special function. Due to the incomparable advantages of general composite materials, FGM has broad application prospects in various fields with special requirements for materials through the ingenious combination of metals, ceramics, polymers and other substances, and has been highly valued by countries all over the world. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P13/00C22C23/02
Inventor 王文张升懿王快社乔柯袁胜男
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY