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A method for preparing a broadband laser to strengthen Ni-based cladding layer with dual-phase ceramic particles

A technology of ceramic particles and cladding layer, applied in the direction of coating, metal material coating process, etc., can solve the problems of weakening performance, slow convection of molten pool, uneven structure and performance of cladding layer, etc., to improve surface performance , The effect of improving cladding efficiency, hardness and wear resistance

Active Publication Date: 2020-11-24
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when broadband laser cladding is used, the convection of the molten pool is slow. Since the density of WC ceramic particles is higher than that of the nickel-based liquid phase, the added WC ceramic particles are easily deposited at the bottom of the cladding layer under the action of gravity, resulting in uneven cladding layer structure and properties. , impair its performance

Method used

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  • A method for preparing a broadband laser to strengthen Ni-based cladding layer with dual-phase ceramic particles
  • A method for preparing a broadband laser to strengthen Ni-based cladding layer with dual-phase ceramic particles
  • A method for preparing a broadband laser to strengthen Ni-based cladding layer with dual-phase ceramic particles

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Embodiment 1

[0029] A method for broadband laser preparation of dual-phase ceramic particle reinforced Ni-based cladding layer, comprising the following steps:

[0030] (1) The basic powder is Ni-Cr-Si-B series self-fluxing alloy powder, the composition of which is: C: 1.0wt%, Cr: 14wt%, Fe: 12wt%, Si: 3.5wt%, B : 1.5wt%, the balance is Ni, the particle size of the base powder is 250 mesh.

[0031] (2) Added powders include: WC granules, purity 99.9%, particle size 300 mesh, the proportion added to the composite powder is 20wt%; Ti powder, purity 99.99%, particle size 400 mesh, the proportion added to the composite powder is 2.0wt %; Cr powder, purity 99.9%, particle size 300 mesh, the proportion added in the composite powder is 5.0wt%. Y 2 o 3 The powder has a purity of 99.99%, a particle size of 400 mesh, and a ratio of 0.5 wt% added to the composite powder.

[0032] (3) Mix the above mixed composite powder uniformly with a mechanical powder mixer for 3 hours, take it out, add approp...

Embodiment 2

[0038] A method for broadband laser preparation of dual-phase ceramic particle reinforced Ni-based cladding layer, comprising the following steps:

[0039] (1) The basic powder is Ni-Cr-Si-B series self-fluxing alloy powder, the composition of which is: C: 1.0wt%, Cr: 14wt%, Fe: 12wt%, Si: 3.5wt%, B : 1.5wt%, the balance is Ni, the particle size of the base powder is 250 mesh.

[0040] (2) The added powder includes: WC particles, with a purity of 99.9%, a particle size of 300 mesh, and an addition ratio of 35wt% in the composite powder; Ti powder, a purity of 99.99%, a particle size of 400 mesh, and an addition ratio of 5.0wt% in the composite powder; Cr powder, with a purity of 99.9%, a particle size of 300 mesh, and an addition ratio of 10.0wt% in the composite powder; Y 2 o 3 The powder has a purity of 99.99%, a particle size of 400 mesh, and a ratio of 1.2wt% added to the composite powder.

[0041] (3) Mix the above composite powder uniformly with a mechanical powder mi...

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Abstract

The invention relates to the technical field of surface engineering, in particular to a method for preparing a biphase ceramic particle reinforcing Ni base cladding layer by broadband laser. The broadband laser is adopted to clad the surface of Q460 low alloy steel; the laser power is 2.0-4.0 kW; the laser scanning speed is 0.09-0.6 m / min; and the argon shielding is performed in the cladding process. Ni-Cr-Si-B serial self-fluxing alloy powder is used as basic powder; and WC, Ti, Cr and Y2O3 are added for alloying modification. Ti elements are added for in-situ reaction to generate netty TiC ceramic particles to achieve a homogenizing effect. Added WC particles are dissolved in situ to provide a C source; and massive (Cr, W)5B3 ceramic particles generated in situ achieve an effect of improving the hardness and the wear resistance. The obtained cladding layer is excellent in formability and free of crack defects. Microscopic structures are the massive (Cr, W)5B3 ceramic particles and the netty TiC particles, which are uniformly distributed, so that the uniformity of the nickel base cladding layer prepared by the broadband laser is improved, and the performances are further improved.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a method for preparing a dual-phase ceramic particle-reinforced Ni-based cladding layer with a broadband laser. Background technique [0002] Laser cladding technology is an important surface modification method. It uses high-energy laser beams as a heat source to melt powdery or filamentary materials and micro-melt the matrix. After cooling, it can form a surface with high hardness, wear resistance, and corrosion resistance. performance cladding layer. The use of laser cladding technology to strengthen the surface properties of ordinary carbon steel, low alloy steel and other materials can greatly extend the service life of parts, has a significant cost advantage, and also meets the requirements of green manufacturing. In traditional laser cladding, when a large-area cladding layer is prepared by a round beam laser, the cladding area needs to be continuously overlap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05C22C30/00C22C32/00
CPCC22C19/058C22C30/00C22C32/0005C23C24/103
Inventor 马群双尹孝辉孟威胡磊李华东
Owner ANHUI UNIVERSITY OF TECHNOLOGY