Laser-cladded composite wear-resisting layer on surfaces of copper and copper alloys and preparation method

A laser cladding and copper alloy technology, applied in the field of material science, can solve the problems of high price, complex process, insufficient coating toughness, etc., and achieve the effect of compact structure, high efficiency and low energy consumption

Inactive Publication Date: 2011-05-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3) Insufficient toughness in the coating, defects such as thermal cracking and stress exist inside the coating
However, the process is slightly complicated, and plasma spraying and high-power CO 2 Laser equipment is bulky and expensive
In addition, the patent "A New Method for Surface Coating

Method used

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  • Laser-cladded composite wear-resisting layer on surfaces of copper and copper alloys and preparation method
  • Laser-cladded composite wear-resisting layer on surfaces of copper and copper alloys and preparation method
  • Laser-cladded composite wear-resisting layer on surfaces of copper and copper alloys and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] In this embodiment, a pulsed Nd:YAG laser is used to laser cladding the composite wear-resistant layer on the surface of a 500×200×10mm red copper plate. The preparation method is carried out in the following steps:

[0031] 1. Red copper plate surface activation treatment

[0032] The surface of the copper plate with a thickness of 10mm is sandblasted or the copper plate is roughened with 60# coarse sandpaper to remove surface rust to enhance the bonding strength between the copper alloy surface and the cladding layer, and then use acetone to clean and remove oil stains. Dry at low temperature (<100℃) or air dry.

[0033] 2. Prepare nickel-based alloy raw materials and preset transition layer

[0034] The nickel-based alloy raw materials for the transition layer are prepared according to the following components (weight percentage): Cu 20.0%, Al 6.0%, Si 0.3%, Zr 1.7%, and the balance is Ni. The above-mentioned raw materials have a particle size of 200-400 ...

Example Embodiment

[0044] Example 2:

[0045] In this embodiment, a pulsed Nd:YAG laser is used to laser cladding the composite wear-resistant layer on the surface of the copper plate of the continuous casting slab mold. The copper plate is a Cr-Zr-Cu alloy. The coating thickness is required to be 0.8mm at one end and 2.0mm at the other end. . The preparation method is carried out as follows:

[0046] 1. Surface pretreatment of copper plate

[0047] Use 60# coarse sandpaper to manually polish the surface of the crystallizer copper plate to remove oxides and rust, and then clean the surface with acetone to remove oil stains.

[0048] 2. Preparation of nickel-based alloy raw materials

[0049] The nickel-based alloy raw materials for the transition layer are prepared according to the following components (weight percentage): Cu 30.0%, Al 8.0%, Si 0.6%, Zr 2.4%, and the balance is Ni. The above-mentioned raw materials have a particle size of 200-400 mesh and are uniformly mixed.

[0050] 3. Preset, laser c...

Example Embodiment

[0058] Example 3:

[0059] The present invention performs laser laser cladding composite wear-resistant layer on the surface of phosphorous deoxidized copper (TP1), and the preparation method is carried out according to the following steps:

[0060] 1. Surface pretreatment of copper plate

[0061] The surface is sandblasted to remove oxides and rust, and then clean the surface with acetone to remove oil stains.

[0062] 2. Prepare nickel-based alloy raw materials, preset and prepare transition layer by laser cladding

[0063] The nickel-based alloy raw materials for the transition layer are prepared according to the following composition (weight percentage): Cu 25%, Al 7%, Si 0.5%, Zr 2.0%, and the balance is Ni. The above-mentioned raw materials have a particle size of 200-400 mesh and are uniformly mixed.

[0064] 3. Preset, laser cladding to prepare transition layer

[0065] The above-mentioned nickel-based alloy powder is fed into the laser melting pool with a roller-type negative pr...

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Abstract

The invention relates to a laser-cladded composite wear-resisting layer on the surfaces of copper and copper alloys and a preparation method. The composite wearing layer is a multi-layered laser cladding layer comprising at least two or more than two layers, wherein the coating connected with a substrate is the first layer, which is also called as a transition layer and is a copper-based alloy prepared from the following components in percentage by weight: 20.0-30.0 percent of Cu, 6.0-8.0 percent of Al, 0.3-0.6 percent of Si, 1.7-2.4 percent of Zr and the balance of Ni; and the rest layer is a cobalt-based alloy prepared from the following components in percentage by weight: 1.0-1.5 percent of C, 25-30 percent of Cr, 2-4 percent of Fe, 10-15 percent of W, 0.8-1.2 percent of Si, 3-4 percent of B, 8-12 percent of Ti, 10-12 percent of Ni and the balance of Co. The composite wear-resisting layer provided by the invention has compact tissues without cracks or pores and forms favorable metallurgy combination with the surfaces of copper and copper alloys. The preparation method provided by the invention can be used for accurately controlling the thickness of the composite wear-resisting layer and automatically controlling the whole process, and has the advantages of low energy consumption, no pollution, high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of material science, in particular to a laser cladding composite wear-resistant layer on the surface of copper and copper alloy and a preparation method thereof. Background technique [0002] Copper has good conductivity and good mechanical properties, so copper alloy is an indispensable metal material in industry, and has been widely used in electric appliances, machinery manufacturing, aerospace and other industries. In recent years, the sharp rise in copper prices has further increased the cost of copper alloy parts. With the rapid development of science and technology, there is an urgent need to improve the performance of copper alloy materials. It is required to ensure high thermal conductivity or high electrical conductivity. Improve its hardness, wear resistance and arc ablation resistance. Therefore, surface modification is an effective way to prolong the service life of copper alloy parts and reduc...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 王爱华闫华
Owner HUAZHONG UNIV OF SCI & TECH
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