Copper-based coating for laser cladding on iron-based alloy surface and preparation method thereof

An iron-based alloy and laser cladding technology, which is applied to the coating process of metal materials, coatings, metal/alloy conductors, etc., can solve the problems of poor cladding quality of pure copper coatings and poor bonding performance of iron substrates, and achieve Good continuity, good surface quality, effect of promoting uniform mixing

Active Publication Date: 2017-09-19
菏泽市金沃泰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of poor cladding quality and poor bonding performance with iron substrates in laser cladding high conductivity pure copper coatings on iron-based surfaces in the prior art, the present invention provides a copper coating for laser cladding on iron-based alloy surfaces. Base coat and method for its preparation

Method used

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  • Copper-based coating for laser cladding on iron-based alloy surface and preparation method thereof
  • Copper-based coating for laser cladding on iron-based alloy surface and preparation method thereof
  • Copper-based coating for laser cladding on iron-based alloy surface and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] First, configure Cu-0.4%Y according to weight percentage 2 o 3 (indicating Y 2 o 3 The mass fraction is 0.4%, the same reason behind), Cu-1.2%Y 2 o 3 , Cu-2%Y 2 o3 , Cu-0.4%CeO 2 , Cu-0.8% Al 2 o 3 and Cu-1.2%Sm 2 o 3 100 grams of alloy powders with six components each, the purity of the added Cu powder is ≥99.5%, the particle size distribution is 10-104 μm, and the particle size distribution of the added nano-oxide is 20-100 nm.

[0034] Subsequently, alcohol (absolute ethanol) was added to the configured alloy powder and wet-milled for 30 minutes in a planetary ball mill (Germany, PM100). The rotational speed of the planetary ball mill was 200 rpm, and the added alcohol and alloy powder The volume ratio is 3:1, and the mixed alloy powder is dried in a vacuum drying oven at 60°C for use.

[0035] Thirdly, decontaminate and derust the surface of No. 45 steel-based alloy to be laser clad, and preheat it at 400° C. for 2 hours. Then, using the cross-flow CO pr...

Embodiment 2

[0041] First, configure Cu-0.4%Y according to weight percentage 2 o 3 -0.5%CeO 2 (indicating Y 2 o 3 The mass fraction is 0.4%, CeO 2 The mass fraction is 0.5%, the same reason behind) and Cu-1.0%Y 2 o 3 -0.6% Al 2 o 3 The alloy powders of the two components are 100 grams each, the purity of the added Cu powder is ≥99.5%, the particle size distribution is 10-100 μm, and the particle size distribution of the added nano-oxide is 20-100 nm.

[0042] Subsequently, alcohol (ethanol aqueous solution with a volume fraction of 80%) was added to the configured alloy powder to carry out wet grinding in a planetary ball mill (Germany, PM100) for 20 minutes, and the rotational speed of the planetary ball mill was 500 rpm. The volume ratio of alcohol to powder is 2:1, and the mixed powder is dried in a vacuum drying oven at 50°C for use.

[0043] Again, decontaminate and derust the total surface of the No. 45 steel substrate to be laser clad, and preheat it at 600°C for 1.5 hours....

Embodiment 3

[0046] First, configure Cu-0.3%Y according to weight percentage 2 o 3 -1.5% Sm 2 o 3 (indicating Y 2 o 3 The mass fraction is 0.3%, Sm 2 o 3 The mass fraction is 1.5%, the same reason behind) and Cu-1.0%CeO 2 -1.0% Al 2 o 3 The alloy powders of the two components are 100 grams each, the purity of the added Cu powder is ≥99.5%, the particle size distribution is 10-100 μm, and the particle size distribution of the added nano-oxide is 20-100 nm.

[0047] Subsequently, alcohol (aqueous ethanol solution with a volume fraction of 50%) was added to the configured alloy powder to carry out wet grinding for 60 minutes in a planetary ball mill (Germany, PM100), and the speed of the planetary ball mill was 100 rpm. The volume ratio of alcohol to powder is 2:1, and the mixed powder is dried in a vacuum drying oven at 50°C for use.

[0048] Thirdly, decontaminate and derust the surface of No. 45 steel-based alloy to be laser clad and preheat at 800°C for 1.0 hour. Then, using th...

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Abstract

The invention discloses a copper-based coating for iron-based alloy surface laser cladding and a preparation method thereof, belonging to the technical field of material surface modification. The 0.4-2 mass percent of nano oxides such as CeO2, Al2O3, Sm2O3 and Y2O3 are added into pure copper powder, so that the problems that the cladding quality is low, the binding property with the iron-based alloy is poor when a pure copper coating is subjected to laser cladding on the surface of the iron-based alloy and the like are solved. In addition, cladding is performed by adopting extremely high laser scanning speed of 600-1000mm per minute, the problem that the additional nano-particles are easily aggregated in the coating coagulation process is solved, and uniform distribution of the nano-particles in the copper coating is realized. Meanwhile, according to the high surface effect and heterogeneous nucleation effect of the nano oxides, the coagulation tissues at the coating interface can be refined by 10 times or more. Compared with a laser cladding pure copper coating, the copper-based coating prepared by the invention has high cladding quality, the hardness is improved by nearly 40 percent, and the conductivity reaches 82% IACS (International Annealed )soft) Copper Standard).

Description

technical field [0001] The invention belongs to the technical field of material surface modification, and in particular relates to a copper-based coating used for laser cladding on the surface of an iron-based alloy and a preparation method thereof. Background technique [0002] Copper has excellent electrical conductivity and thermal conductivity. Laser cladding copper-based coatings on the surface of iron-based alloys to prepare iron-copper double-layer metals can not only make it have special electrical and other functional properties, but also the iron matrix can endow the material with a higher overall strength. and toughness. However, the thermophysical properties of copper and iron are quite different, especially the poor wettability between the two, which makes it difficult for the laser cladding high conductivity pure copper coating to form an effective bond with the iron substrate. The previous solutions are generally Fluxes are added to copper-based powders for c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C9/00H01B1/02
Inventor 张晖何宜柱
Owner 菏泽市金沃泰化工有限公司
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