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A kind of method of Cu surface laser additive manufacturing graded composite material

A composite material and laser additive technology, which is applied in the direction of additive manufacturing, additive processing, and improvement of process efficiency, can solve the problems of less research and achieve the effect of solving large stress

Active Publication Date: 2020-04-28
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Combining the gradient material design concept with the laser additive manufacturing process to prepare sliding electrical contact materials is a feasible and effective way. At present, there are few researches in this area, and there is a broad space for development.

Method used

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  • A kind of method of Cu surface laser additive manufacturing graded composite material
  • A kind of method of Cu surface laser additive manufacturing graded composite material
  • A kind of method of Cu surface laser additive manufacturing graded composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of method for Cu surface laser additive manufacturing graded composite material, comprises the following steps:

[0031] When preparing the gradient material, the whole material is divided into 5 layers, wherein the gradient layer connected to the surface of the Cu substrate is the first layer, and each layer uses Cu powder, VN ceramic powder and Ni-based alloy powder as powder raw materials, and the Cu powder The particle size of the VN powder is 50-150 μm and the purity is 99.9%; the particle size of the VN powder is 2-10 μm and the purity is 99.9%; the particle size of the Ni-based alloy powder is 50-100 μm and the purity is 99.9%.

[0032] Accurately weigh the above-mentioned layers of powder by weight:

[0033] The first gradient layer, 2% VN ceramic powder, 12% Ni-based alloy powder and 86% Cu powder;

[0034] The second gradient layer, 4% VN ceramic powder, 24% Ni-based alloy powder and 72% Cu powder;

[0035] The third gradient layer, 6% VN ceramic powd...

Embodiment 2

[0046] A kind of method for Cu surface laser additive manufacturing graded composite material, comprises the following steps:

[0047]When preparing the gradient material, the entire material is divided into 9 layers, wherein the gradient layer connected to the surface of the Cu substrate is the first layer, and each layer uses Cu powder, VN ceramic powder and Ni-based alloy powder as powder raw materials, and the Cu powder The particle size of the VN powder is 50-150 μm and the purity is 99.9%; the particle size of the VN powder is 2-10 μm and the purity is 99.9%; the particle size of the Ni-based alloy powder is 50-100 μm and the purity is 99.9%.

[0048] The VN content increases layer by layer from 2.0% in the first layer to 10.0% in the ninth layer by weight, the ratio of VN and Ni-based alloy powder is always 1:3, and the ratio of Cu decreases accordingly.

[0049] Accurately weigh the above-mentioned layers of powder by weight:

[0050] The first gradient layer, 2% VN c...

Embodiment 3

[0066] A kind of method for Cu surface laser additive manufacturing graded composite material, comprises the following steps:

[0067] When preparing the gradient material, the entire material is divided into three layers, wherein the gradient layer connected to the surface of the Cu substrate is the first layer, and each layer uses Cu powder, VN ceramic powder and Ni-based alloy powder as powder raw materials, and the Cu powder The particle size of the VN powder is 50-150 μm and the purity is 99.9%; the particle size of the VN powder is 2-10 μm and the purity is 99.9%; the particle size of the Ni-based alloy powder is 50-100 μm and the purity is 99.9%.

[0068] The VN content increases layer by layer from 2.0% in the first layer to 8% in the third layer by weight, the ratio of VN and Ni-based alloy powder is always 1:9, and the ratio of Cu decreases accordingly.

[0069] Accurately weigh the above-mentioned layers of powder by weight:

[0070] The first gradient layer, 2% VN...

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Abstract

The invention discloses a method for manufacturing gradient composite materials by laser additive manufacturing on Cu surface, comprising the following steps: preparing powder raw materials for laser additive manufacturing gradient materials; surface pretreatment of Cu matrix; using laser additive manufacturing equipment, by Regulate the powder composition and process parameters to deposit layer by layer to obtain gradient composite materials; the main elements Cu, V, and Ni in the gradient materials obtained by the present invention are distributed in a gradient along the construction direction, and the gradient layers are well combined. increasing, the hardness value of the gradient material increases gradually.

Description

technical field [0001] The invention relates to the field of laser additive manufacturing, in particular to a method for manufacturing gradient composite materials by laser additive manufacturing on a Cu surface. Background technique [0002] The function of the sliding electrical contact material is to conduct current between the fixed part and the moving part of the equipment. For example, the pantograph obtains electric energy and transmits it to the electric locomotive through sliding contact with the catenary. In the working state, the sliding contact side requires strong wear resistance and antifriction performance, while the substrate needs to have good electrical conductivity. Therefore, different parts of the electrical contact material have different material performance requirements. For coatings prepared directly on the surface of materials by chemical plating, vapor deposition, thermal spraying, etc., problems such as weak interface bonding and coating peeling m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F7/04B22F7/08C22C9/06C22C19/03C22C32/00C22C1/05C22C1/10
CPCC22C1/05C22C9/06C22C19/03C22C32/0068B22F7/04B22F7/08B22F2007/042B22F10/00B22F10/37B22F10/34B22F10/36B22F12/41B22F10/30Y02P10/25
Inventor 战再吉张琦曹海要
Owner YANSHAN UNIV