Copper-based amorphous composite coating and preparation method thereof

A composite coating and copper-based alloy technology, which is applied in the coating, metal material coating process, etc., can solve the problems of amorphous composite coating, and achieve the effect of no hole defect, uniform structure and dense structure

Inactive Publication Date: 2020-11-24
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since the preparation process determines the microstructure of the coating, how to prepare an amorphous composite coating with excellent properties such as high strength, high hardness and friction and wear resistance is still a big problem.

Method used

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  • Copper-based amorphous composite coating and preparation method thereof
  • Copper-based amorphous composite coating and preparation method thereof
  • Copper-based amorphous composite coating and preparation method thereof

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Experimental program
Comparison scheme
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Embodiment 1

[0028] Embodiment 1: the atomic percent of each composition of described copper-based alloy is: (Cu 0.6 f 0.25 Ti 0.15 ) 90 Nb 10 .

[0029] (1) Preparation of copper-based alloy powder

[0030] Convert the atomic percentage of each component of the copper-based alloy into the corresponding mass percentage, then weigh the corresponding mass of metal Cu, Hf, Ti and Nb according to the mass percentage, and put it into a water-cooled copper crucible after configuration, and the vacuum degree is less than 1×10 -3 Pa, for vacuum arc melting. In order to ensure uniform distribution of elements, the alloy was smelted three times. After cooling, the alloy ingot is put into a vibration mill for mechanical crushing, sieved with a 200-mesh sieve and a 400-mesh sieve, and the powder with a particle size range of 38-75 μm is taken for laser cladding. X-ray diffraction pattern of copper-based alloy powder figure 1 shown by figure 1 It can be seen that diffuse scattering packets (br...

Embodiment 2

[0041] Embodiment 2: the atomic percent of each composition of described copper-based alloy is: (Cu 0.6 f 0.25 Ti 0.15 ) 98 Nb 2 .

[0042] (1) Preparation of copper-based alloy powder

[0043] Copper-based alloy powders were synthesized by vacuum arc melting and mechanical crushing. Convert the atomic percentage of each component of the copper-based alloy into the corresponding mass percentage, then weigh the corresponding mass of metal Cu, Hf, Ti and Nb according to the mass percentage, and put it into a water-cooled copper crucible after configuration, and the vacuum degree is less than 1×10- 3Pa, for vacuum arc melting. In order to ensure uniform distribution of elements, the alloy was smelted three times. After cooling, the alloy ingot is put into a vibration mill for mechanical crushing, sieved with a 200-mesh sieve and a 400-mesh sieve, and the powder with a particle size range of 38-75 μm is taken for laser cladding. X-ray diffraction pattern of copper-based al...

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Abstract

The invention provides a copper-based amorphous composite coating and a preparation method thereof. The preparation of copper-based powder comprises the steps of: pretreating a copper matrix; pre-positioning copper-based alloy powder on the surface of the pretreated copper matrix to obtain a pre-positioned copper-based alloy powder layer; performing laser preheating on the pre-positioned copper-based powder alloy powder layer to the temperature of 700 DEG C; and then performing laser cladding processing. The preparation process provided by the invention is close to the actual industrializationlevel, controllable in condition and simple in preparation; and the obtained coating is uniform in tissues, compact in structure and free of crack and hole defects. The copper-based amorphous composite coating has excellent performances such as high strength, high hardness and frictional wear resistance, and has great application potential in the national defense industry.

Description

technical field [0001] The invention relates to the field of surface engineering, in particular to a copper-based amorphous composite coating and a preparation method thereof. Background technique [0002] Amorphous alloys, also known as metallic glasses, have metastable structural characteristics of long-range disorder and short-range order. Compared with traditional crystalline alloys, amorphous alloys have outstanding properties such as high strength, high hardness, wear resistance and corrosion resistance. Among them, the copper-based amorphous alloy has both high strength and high glass-forming ability exceeding 2000 MPa, but its lack of amorphous size and preparation process limits its wide application in the engineering field. The preparation of amorphous coating can break through the short board of bulk amorphous alloy in size while ensuring the excellent performance of amorphous, which greatly promotes the industrial application of amorphous alloy materials. Metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C9/00
CPCC23C24/106C22C9/00
Inventor 战再吉曹海要卜令春
Owner YANSHAN UNIV
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