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Preparation method, composite material and device of a light metal bulk composite material

A composite material and preparation device technology, applied in metal material coating process, metal processing equipment, manufacturing tools, etc., can solve the problems of poor forming quality, shrinkage, excessive interface reaction, etc., achieve excellent comprehensive performance, internal stress Small, controllable effect

Active Publication Date: 2021-01-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the casting method is cast, due to the viscous resistance of forming, the inhomogeneity of the microstructure, and the excessive interface reaction caused by the addition of strengthening phase particles, the forming quality is often poor, and the casting structure is prone to produce porosity, shrinkage and composition. Defects such as segregation, the performance of the casting material cannot meet the requirements for the use of light metal block composite materials
Therefore, in view of the problems of poor high-temperature forming quality, easy to produce macroscopic structural defects, and serious performance degradation in the preparation of light metal block composites, it is urgent to choose a method for preparing light metal block composites to solve the problems faced by the current conventional casting methods. The main problem is to obtain a light metal block composite material with good compactness, uniform structure mixing, and excellent comprehensive performance

Method used

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  • Preparation method, composite material and device of a light metal bulk composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] According to the method of the present invention, the surface of the Al alloy plate whose size is 300mm × 300mm × 3mm is chemically cleaned and fixed on the workbench, and 2024Al nanocrystalline alloy powder is selected to prepare the cold spray coating;

[0051] Selection of cold spraying parameters: carrier gas temperature 200°C, carrier gas pressure 3.0MPa, spraying distance 18mm, powder feeding rate 40g, spray gun moving speed 18mm / min.

[0052] The thickness of each layer of coating is 4.4~4.5mm, and the reinforcing powder is made of Cr 3 C 2 Alloy powder particles, the particle size is 10-20μm, Cr 3 C 2 The amount of alloy powder particles added in each layer of coating is 0.08g / cm 2 , the Cr 3 C 2 The alloy powder particles are loaded into the inner circular cavity of the roller, the vibration frequency is selected as 50Hz, and the rolling depth is 0.3mm. When the coating temperature is 100°C, the cold sprayed coating is rolled under constant pressure, and t...

Embodiment 2

[0055] According to the method of the present invention, the surface of the Mg alloy plate whose size is 300mm × 600mm × 3mm is chemically cleaned and fixed on the workbench, and AZ91 nanocrystalline alloy powder is selected to prepare the cold spray coating;

[0056] The difference between this embodiment and embodiment one is that the reinforcing powder selected is aluminum borate whisker (Al 18 B 4 o 33W ) alloy powder, aluminum borate whiskers (Al 18 B 4 o 33W ) The amount of alloy powder particles added in each layer of coating is 0.08g / cm 2 ; The particle size is 10-20 μm.

[0057] Block composite material inspection, ultrasonic inspection results, no defects near the surface and inside of processing; abrasive wear inspection results: weight loss is 75% lower than that of AZ91 magnesium alloy base metal; tensile samples were prepared along the friction stir processing direction, tensile test Results: The tensile strength is 42% higher than that of AZ91 magnesium allo...

Embodiment 3

[0059] The difference between this example and Example 1 is that the reinforcing powder is a mixed metal powder of Al and Cu and Al and Zn, and Al and Cu and Al and Zn are respectively configured at a mass ratio of 5:1. The powder is mixed according to the mass ratio of 1:1.

[0060] Block composite material inspection, ultrasonic inspection results: there are no defects near the surface and inside of the processing; abrasive wear inspection results: the weight loss is 128% lower than that of the 2024 aluminum alloy base metal; tensile samples are prepared along the friction stir processing direction, and the tensile test Results: The tensile strength is 2.1 times that of 2024 aluminum alloy, and the elongation is 89% of 2024 aluminum alloy. The results of neutral salt spray corrosion test: a little corrosion product appears on the surface of the composite material at 1000h, which is much higher than that of 2024 aluminum alloy at 72h.

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Abstract

The invention discloses a preparation method, composite material and device of a light metal block composite material, which comprises spraying and depositing a light metal powder coating on the surface of a light metal substrate by adopting a cold spray deposition accumulation method, and then using a rolling vibration method to deposit the reinforced powder Embedding and / or increasing the compactness of the light metal powder coating, and finally friction stir processing of the light metal powder coating using friction stir welding. In this way, a single-layer light metal composite layer material is prepared, and the above steps are repeated to obtain a light metal block composite material with a certain thickness. This method has low cost, high processing efficiency, good controllability, and the prepared light metal block composite material has small internal stress. , No defects, excellent overall performance.

Description

technical field [0001] The invention belongs to the field of metal matrix composite materials and manufacturing technology, and in particular relates to a preparation method, composite material and device of a light metal block composite material. Background technique [0002] Magnesium alloy and aluminum alloy light metal materials have the advantages of low density, high specific strength, and high specific stiffness. They are widely used in the manufacturing industry and gradually become the most promising light non-ferrous metal materials. In recent years, with the rapid development of aerospace and other industrial technologies, the requirements for light metal high-performance bulk composite materials are getting higher and higher. [0003] There are three methods for the preparation of bulk composite materials, liquid phase method, solid phase method and gas phase method. Due to the high working temperature, the solid phase method and gas phase method are suitable for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04C23C24/06B23K20/12
CPCB23K20/122C23C24/045C23C24/06
Inventor 王文王洪铎乔柯王快社彭湃王盈辉金园园
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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