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Preparation method of nickel-based copper-coated silicon carbide laser cladding layer

A technology of copper-clad silicon carbide and laser cladding, which is applied in the direction of coating, etc., to achieve the effect of weakening the direct effect, improving the service life and avoiding burning loss

Inactive Publication Date: 2018-01-05
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of these methods involves how to prepare a silicon carbide-enhanced nickel-based cladding layer with silicon carbide primary particle morphology on a steel substrate by laser cladding without argon protection.

Method used

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  • Preparation method of nickel-based copper-coated silicon carbide laser cladding layer
  • Preparation method of nickel-based copper-coated silicon carbide laser cladding layer
  • Preparation method of nickel-based copper-coated silicon carbide laser cladding layer

Examples

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Effect test

Embodiment 1

[0032] A preparation method of a nickel-based copper-clad silicon carbide laser cladding layer, comprising the steps of:

[0033] (1) First purify the SiC powder, put the SiC powder with a particle size of 300 mesh to 350 mesh in a crucible furnace at 800 ° C for 2 hours to remove free carbon, metal and other organic impurities mixed in the SiC powder; then SiC Powder cleaning, ultrasonic cleaning of SiC powder with deionized water, and then degreasing of SiC powder with 10wt% NaOH, and then soaking in 10wt% dilute hydrochloric acid to neutralize the NaOH in the previous step, and finally using absolute ethanol to degrease the SiC powder. Perform ultrasonic cleaning until the liquid is clear after cleaning; then roughen the SiC powder, use 5wt% HF solution to soak the SiC powder for 5 minutes under ultrasonic conditions to improve the surface roughness of SiC, and use a Clean the powder with ionized water; then sensitize the SiC powder, put the SiC powder in a mixed solution o...

Embodiment 2

[0041] A preparation method of a nickel-based copper-clad silicon carbide laser cladding layer, comprising the steps of:

[0042] (1) First purify the SiC powder, put the SiC powder with a particle size of 300 mesh to 350 mesh in a crucible furnace at 700 ° C for 2 hours to remove free carbon, metal and other organic impurities mixed in the SiC powder. Then clean the SiC powder, ultrasonically clean the SiC powder with deionized water, then use 10wt% NaOH to degrease the SiC powder, then soak in 10wt% dilute hydrochloric acid to neutralize the NaOH in the previous step, and finally use anhydrous Ethanol was used to ultrasonically clean the SiC until the liquid was clear after cleaning. Then, roughen the SiC powder, use 5wt% HF solution to soak the SiC powder for 5 minutes under ultrasonic conditions to improve the surface roughness of SiC to strengthen the effect of the subsequent steps, and use deionized water after roughening. Clean up. Subsequently, the SiC powder was sen...

Embodiment 3

[0050] A preparation method of a nickel-based copper-clad silicon carbide laser cladding layer, comprising the steps of:

[0051] (1) First purify the SiC powder, put the SiC powder with a particle size of 300 mesh to 350 mesh in a crucible furnace at 900 ° C for 2 hours to remove free carbon, metal and other organic impurities mixed in the SiC powder. Then clean the SiC powder, ultrasonically clean the SiC powder with deionized water, then use 10wt% NaOH to degrease the SiC powder, then soak in 10wt% dilute hydrochloric acid to neutralize the NaOH in the previous step, and finally use anhydrous Ethanol was used to ultrasonically clean the SiC until the liquid was clear after cleaning. Then, roughen the SiC powder, use 5wt% HF solution to soak the SiC powder for 5 minutes under ultrasonic conditions to improve the surface roughness of SiC to strengthen the effect of the subsequent steps, and use deionized water after roughening. Clean up. Subsequently, the SiC powder was sen...

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Abstract

The invention relates to a preparation method of a nickel-based copper-coated silicon carbide laser cladding layer. The preparation method comprises the following steps that S1, copper-coated siliconcarbide and low-hardness nickel-based self-fluxing alloy powder are mixed and subjected to ball grinding according to a certain proportion; S2, a matrix steel plate is subjected to surface treatment and is cleaned and aired for standby application; and S3, the powder subjected to ball grinding in the step S1 is directly paved on the surface of the matrix steel plate in advance, lasers are adoptedfor carrying out cladding on composite powder in the air environment, and the laser cladding layer with undecomposed silicon carbide particles is obtained. The preparation method has the beneficial effects that undecomposed SiC is reserved in the nickel-based copper-coated silicon carbide laser cladding layer; the cladding layer is free of cracks; and the preparation method is used for surface strengthening of various tools, molds and structural parts and is especially suitable for prolonging the service life of seriously-worn tools, molds and parts.

Description

technical field [0001] The invention relates to laser cladding technology, in particular to a preparation method of a nickel-based copper-clad silicon carbide laser cladding layer. Background technique [0002] The main failure modes of tools, molds or mechanical parts during the working process are wear, corrosion and fracture. And wear is the most important form of its failure. The wear failure of tools, dies or mechanical parts mainly occurs on the surface. So improving their surface properties is the most important measure to improve their life. Compared with other surface treatment technologies, laser cladding technology has the advantages of wide applicable material system, low dilution rate, high bonding strength between substrate and cladding layer, and small thermal deformation of substrate. It is often used for surface modification and surface repair of tools, molds or parts. This improves the wear resistance, corrosion resistance and high temperature resistanc...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/02C23C18/40C23C18/18
Inventor 潘成刚程伟伦丁紫正刘笃笃冯斯琦叶传龙周家林
Owner WUHAN UNIV OF SCI & TECH
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