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Preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer

A technology of laser cladding and in-situ synthesis, which is applied in the coating, metal material coating process, etc., can solve the problems of insufficient hardness and wear resistance, poor bonding of the interface between the substrate and the cladding layer, etc. Achieve the effect of simple production equipment and process, easy automation and convenient operation

Active Publication Date: 2021-01-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved in the present invention is to provide a method for preparing a laser cladding in-situ synthetic ceramic phase-reinforced copper-based cladding layer, aiming at the shortcomings of existing pure copper surface strengthening: the improvement of hardness and wear resistance is not enough to meet Requirements, the interface between the substrate and the cladding layer is not well bonded, etc., to solve the problem of pure copper surface strengthening

Method used

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  • Preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer
  • Preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer
  • Preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The laser power is 2000W, Mo and SiC are proportioned according to the following reaction:

[0036] 5Mo+2SiC=MoSi 2 +2Mo 2 C;

[0037] That is, Mo accounts for 85.67wt.% (34 grams), and SiC accounts for 14.33 wt.% (6 grams);

[0038] Among them, the sum of the content of Mo and SiC accounts for 20 wt.% (40 grams) of the total cladding powder mass;

[0039] Ni powder accounts for 35 wt.% (70 grams), Cu powder accounts for 45 wt.% (90 grams);

[0040] S1. Substrate pretreatment

[0041] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to finally obtain a clean surface, and then blackened, that is, a layer of carbon ink is evenly painted on the working surface of the pure copper substrate;

[0042] S2. Preparation of cladding powder

[0043] According to the molar ratio of the reaction, it is converted into a mass ratio, weighed, and proportioned. The cladding powder includes 90 grams of commercially availa...

Embodiment 2

[0053] The laser power is 2400W, Mo and SiC are proportioned according to the following reaction:

[0054] 5Mo+2SiC=MoSi 2 +2Mo 2 C;

[0055] That is, Mo accounts for 85.67wt.% (34 grams), and SiC accounts for 14.33 wt.% (6 grams);

[0056] Among them, the sum of the content of Mo and SiC accounts for 20 wt.% (40 grams) of the total cladding powder mass;

[0057] Ni powder accounts for 35 wt.% (70 grams), Cu powder accounts for 45 wt.% (90 grams);

[0058] S1. Substrate pretreatment

[0059] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to finally obtain a clean surface, and then blackened, that is, a layer of carbon ink is evenly applied to the working surface of the pure copper substrate;

[0060] S2. Preparation of cladding powder

[0061] According to the molar ratio of the reaction, it is converted into a mass ratio, weighed, and proportioned. The cladding powder has 90 grams of commercially available C...

Embodiment 3

[0067] The laser power is 2000W, Mo and SiC are proportioned according to the following reaction:

[0068] 5Mo+2SiC=MoSi 2 +2Mo 2 C;

[0069] That is, Mo accounts for 85.67wt.% (17 grams), and SiC accounts for 14.33 wt.% (3 grams);

[0070] Among them, the sum of the content of Mo and SiC accounts for 10 wt.% (20 grams) of the total cladding powder mass;

[0071] Ni powder accounts for 30 wt.% (60 grams), Cu powder accounts for 60 wt.% (120 grams);

[0072] S1. Substrate pretreatment

[0073] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to finally obtain a clean surface, and then blackened, that is, a layer of carbon ink is evenly applied to the working surface of the pure copper substrate;

[0074] S2. Preparation of cladding powder

[0075] According to the molar ratio of the reaction, it is converted into a mass ratio, weighed, and proportioned. The cladding powder includes 120 grams of commercially avai...

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Abstract

The invention discloses a preparation method of a laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer. The preparation method comprises the following steps that S1, substrate pretreatment is carried out, specifically, a pure copper substrate is placed on the working surface, abrasive paper polishing, oil removing, rust removing and cleaning are carried out, and then blackening treatment is carried out; S2, cladding powder is prepared, specifically, the cladding powder containing Mo powder, SiC powder, Ni powder and Cu powder is prepared, wherein the content ofMo and SiC accounts for 10 wt.%-30 wt.%, the content of Ni powder accounts for 30 wt.%-40 wt%, and the balance is Cu powder; Mo accounts for 85.67 wt.%, and SiC accounts for 14.33 wt.%; S3, powder mixing and drying are carried out, specifically, the cladding powder prepared in the step S2 is mixed through a V-shaped mixer, and then the mixed powder is dried; and S4, laser cladding is carried out,specifically, the laser cladding is carried out under the protective gas atmosphere, and the multiphase ceramic is generated. The ceramic phase reinforced copper-based cladding layer prepared by themethod is compact in structure and free of pores and cracks, and has a good application prospect.

Description

technical field [0001] The invention relates to a method for preparing a laser cladding in-situ synthetic ceramic phase reinforced copper-based cladding layer, belonging to the technical field of laser additive manufacturing. Background technique [0002] Copper and its alloys are widely used in electric power, metallurgy, machinery, aviation, aerospace and other fields because of their excellent electrical conductivity, high thermal conductivity and good plasticity. However, parts that work under harsh conditions, such as continuous casting molds and blast furnace tuyeres, require materials with low deformation, high wear resistance, and low friction coefficient. Copper and its alloys are difficult to directly meet engineering requirements. In particular, the copper material has a high friction coefficient when it slides with the matching pair or self-matching pair under the condition of no lubricating medium, and causes serious adhesive wear, which greatly limits the engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C9/06C22C30/02C22C32/00
CPCC23C24/103C22C9/06C22C30/02C22C32/0047Y02P10/25
Inventor 战再吉周天宇曹海要
Owner YANSHAN UNIV
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