Metal-based surface composite material and preparation method thereof

A surface composite material and metal-based technology, which is applied in the field of metal material manufacturing, can solve the problems of holes in the composite layer, poor bonding between the composite layer and the matrix, and poor particle uniformity, and achieves high efficiency, good bonding, and technology. simple effect

Inactive Publication Date: 2018-03-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Aluminum-based surface composites prepared by these methods have disadvantages such as poor bonding between the composite layer and the substrate, and holes in the composite layer.
[0005] There are also many people who have prepared aluminum-based surface composites by processing some blind holes and grooves on the surface of the aluminum alloy plate, and then filling them with particles for fric

Method used

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  • Metal-based surface composite material and preparation method thereof
  • Metal-based surface composite material and preparation method thereof
  • Metal-based surface composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The suspension of 1um silicon carbide particles and polyvinyl alcohol aqueous solution is evenly coated on the lower aluminum alloy plate with a thickness of 5mm, and the coating thickness is 0.1mm, and then the lower aluminum alloy plate is covered with a 3mm thick upper metal cover plate. The friction stir welding machine performs friction stir processing on the upper cladding plate under the technological conditions of a welding speed of 30 mm / min, a rotational speed of 950 rpm, and a stirring head needle of 3.5 mm.

Embodiment 2

[0052] The suspension of 60um zirconia particles and glutinous rice glue aqueous solution is evenly coated on the lower copper alloy plate with a thickness of 7mm, and the coating thickness is 0.6mm, and then the lower copper alloy plate is covered with a 2mm thick upper metal cover plate. The friction welding machine performs friction stir processing on the upper cladding plate under the technological conditions of a welding speed of 200 mm / min, a rotational speed of 2500 rpm, and a stirring head needle of 3.5 mm.

Embodiment 3

[0054] The suspension of 40um alumina particles and polyethylene glycol aqueous solution was evenly coated on the lower magnesium alloy plate with a thickness of 9mm to make the thickness of 0.1mm, and then the lower magnesium alloy plate was covered with a 4mm thick upper metal cladding plate. Friction stir processing is performed on the upper cladding plate under the technological conditions of a friction stir welding machine at a welding speed of 30 mm / min, a rotational speed of 950 rpm, and a stirring head needle of 3.5 mm.

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Abstract

The invention discloses a metal-based surface composite material and a preparation method thereof. The preparation method comprises the following steps: uniformly coating a lower plate with enhanced granules such as silicon carbide by using organic adhesive, covering the lower plate with a thin upper plate, and performing stirring and friction treatment on the upper plate by using a stirring headwith a needle under the conditions that the rotating speed of a stirring and friction machine is 1000 to 2500 rpm and the welding speed is 30 to 200 mm/min to obtain the granule enhanced metal-based surface composite material. The organic adhesive comprises polyvinyl alcohol. The enhanced granules comprise silicon carbide and aluminum oxide. The metal plate can be aluminum alloy or magnesium alloy.

Description

technical field [0001] The invention belongs to the field of metal material manufacturing, in particular to a metal matrix surface composite material and a preparation method thereof. Background technique [0002] Aluminum and its alloys have the characteristics of low density, high electrical conductivity, high specific strength, and good processing performance. They are one of the most widely used non-ferrous metal materials in industry, such as aviation, automobile manufacturing, aerospace, ships, etc. industry. Aluminum and alloys have low hardness and poor wear resistance, which affects their use. Therefore, it has become a consensus to prepare aluminum-based composite materials to solve the problem of low hardness and poor wear resistance of aluminum alloys. [0003] The current aluminum composite materials can be roughly divided into two types: the first is the metal bulk composite material, which has the distribution of the second phase in the whole block material, ...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B38/16B32B38/00B32B15/01B23K20/12B23K20/24
CPCB32B37/1284B23K20/122B23K20/24B32B15/01B32B38/0012B32B38/162B32B38/164B32B2038/0016B32B2038/166
Inventor 方亮孙琨李予良张贵峰史俊勤陈娟
Owner XI AN JIAOTONG UNIV
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