A feni-based laser cladding doped tungsten carbide/chromium carbide composite enhanced high temperature and wear resistance coating and its preparation method

A laser cladding and wear-resistant coating technology, applied in the direction of coating, solid-state diffusion coating, metal material coating process, etc. Good matching effect, low friction coefficient effect

Active Publication Date: 2020-12-04
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Using the spallation target ball as the matching material, in the friction and wear performance test of the single cladding layer modified treatment, the results show that although the wear rate of 316L has been greatly reduced, its friction coefficient is high, resulting in the wear of the target ball. The wear rate has increased by 3 times, resulting in poor overall wear rate performance. In addition, the particle deformation caused by the wear of the target ball will increase the mutual fusion in the subsequent high-temperature sintering process and have a negative impact on the electromagnetic pulling. Therefore, the 316L pipeline While carrying out modification to reduce the wear rate, it is also necessary to ensure that the wear rate of the target ball as a matching material is reduced

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  • A feni-based laser cladding doped tungsten carbide/chromium carbide composite enhanced high temperature and wear resistance coating and its preparation method
  • A feni-based laser cladding doped tungsten carbide/chromium carbide composite enhanced high temperature and wear resistance coating and its preparation method
  • A feni-based laser cladding doped tungsten carbide/chromium carbide composite enhanced high temperature and wear resistance coating and its preparation method

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preparation example Construction

[0028] Another aspect of the present invention provides a FeNi-based laser cladding doped WC / Cr 2 C 3 A method for preparing a composite strengthened high-temperature wear-resistant coating, the preparation method comprising the following steps:

[0029] (1) Polish the surface of the substrate, the surface roughness Ra<0.4, after the treatment, the surface to be treated is preheated under inert gas, and the preheating temperature is 60-220°C;

[0030] (2) performing surfacing treatment on the surface of the substrate treated in step (1) to obtain a surfacing layer;

[0031] (3) Carry out laser cladding treatment on the surfacing layer to obtain a double-layer transitional gradient cladding layer, wherein the chemical composition and mass fraction of the powder used in the first cladding layer are: 10-15wt.%WC, 0.5-1.2wt .%C, 2.0-4.0wt.%Si, 15-30wt.%Ni, 10-25wt.%Cr 2 C 3 , 11.0-18.0wt.%Cr, 0.5-1.5wt.%Zr, 0.07-0.15wt.%Y, the balance is Fe; the chemical composition and mass f...

Embodiment 1

[0043] The invention provides a FeNi-based laser cladding doped tungsten carbide / chromium carbide composite strengthened high-temperature and wear-resistant coating, which includes a surfacing layer, a first cladding layer, a second Cladding layer, vulcanization layer; the chemical composition and mass fraction of the powder used in the first cladding layer are: 10wt.%WC, 0.5wt.%C, 2.0wt.%Si, 15wt.%Ni, 10wt.%Cr 2 C 3 , 11.0wt.%Cr, 0.5wt.%Zr, 0.07wt.%Y, the balance is Fe; the chemical composition and mass fraction of the powder used in the second cladding layer are: 30wt.%WC, 0.5wt.%C, 2.0wt.%Si, 15wt.%Ni, 10wt.%Cr 2 C 3 , 11.0wt.%Cr, 1.5wt.%Zr, 0.07wt.%Y, 2.0wt.%Mo, and the balance is Fe.

[0044] The chemical composition and mass fraction of the powder used in the surfacing layer are 0.1wt.%C, 0.2wt.%Si, 2.0wt.%Cr, 14wt.%Ni, 0.1wt.%Zr, 0.03wt.%Y, 0.06wt .%S, 0.046wt.%, the balance is Fe.

[0045] The sulfide layer is FeS, MoS 2 Solid lubricant layer.

[0046] The prepa...

Embodiment 2

[0053] The invention provides a FeNi-based laser cladding doped tungsten carbide / chromium carbide composite strengthened high-temperature and wear-resistant coating, which includes a surfacing layer, a first cladding layer, a second Cladding layer, vulcanization layer; the chemical composition and mass fraction of the powder used in the first cladding layer are: 1.2wt.%C, 4.0wt.%Si, 20wt.%Ni, 25wt.%Cr 2 C 3 , 18.0wt.%Cr, 14wt.%Ni, 1.5wt.%Zr, 0.10wt.%Y, the balance is Fe; the chemical composition and mass fraction of the powder used in the second cladding layer are: 20wt.%WC, 1.2wt.%C, 4.0wt.%Si, 20wt.%Ni, 15wt.%Cr 2 C 3 , 11.0wt.%Cr, 1wt.%Zr, 0.15wt.%Y, 15wt.%Mo, and the balance is Fe.

[0054] The chemical composition and mass fraction of the powder used in the surfacing layer are 0.2wt.%C, 0.4wt.%Si, 3.2wt.%Cr, 25wt.%Ni, 0.3wt.%Zr, 0.06wt.%Y, 0.02wt .% S, 0.030wt.% P, the balance being Fe.

[0055] The sulfide layer is FeS, MoS 2 Solid lubricant layer.

[0056] The pr...

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Abstract

The invention relates to the field of laser cladding materials, and particularly discloses a FeNi-based laser cladding tungsten carbide / chromium carbide doped composite reinforced high-temperature resistance wear-resistant coating and a preparation method thereof. The preparation method comprises the steps of base body pretreatment, surfacing welding treatment, laser cladding treatment and sulphurtreatment. The coating prepared by adopting the preparation method has the characteristics of low friction coefficients and high harness and abrasion resistant in a service environment, meets requirements of a spalling device in a CiADS system on the abrasion rate of a spalling target pipeline and target ball in the process of target ball rolling friction, meanwhile, realizes a good matching paireffect, and reduces the abrasion rate of the pipeline and the spalling target ball.

Description

technical field [0001] The invention relates to the field of laser cladding materials, in particular to an FeNi-based laser cladding doped with tungsten carbide / chromium carbide composite strengthened high-temperature and wear-resistant coating and a preparation method thereof. Background technique [0002] In the experimental simulation process of the accelerator-driven transmutation research device, the spallation neutron source used is a particle flow target, that is, a tungsten alloy particle target ball with a diameter of 1 mm. During the service of the cracking target system, the loading capacity of the spallation target ball in the spallation system is 100-150 tons, and the target circulation pipeline must bear extremely high loads during the rolling process. Through engineering simulation experiments, it is found that the wear rate of the spallation target pipeline is high during the process of high load and high temperature erosion, reaching a wear rate level of 0.2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C38/34C22C38/50C22C38/44C22C30/00C22C32/00C22C38/60C22C38/02C23C8/38
CPCC22C30/00C22C32/0052C22C38/005C22C38/02C22C38/34C22C38/44C22C38/50C22C38/60C23C8/38C23C24/103
Inventor 吕文泉何源王志光刘杰
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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