Silicide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof

A matrix alloy powder and laser cladding technology, applied in the field of silicide particle enhanced laser cladding high wear-resistant cobalt-based alloy powder and its preparation, laser cladding high wear-resistant parts Special combination powder for cladding, storage, transportation and use are prone to segregation, uneven structure and performance of cladding layer, etc., to achieve excellent laser cladding process performance, reduce laser cladding cost, and achieve the effect of grain refinement

Inactive Publication Date: 2013-03-27
江苏新亚特钢锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The added hard particles are larger and different in density from the matrix metal, and the distribution of the particles in the cladding layer is often uneven, usually showing a gradient distribution; the wettability, stability, and expansion coefficient of the added particle material and the matrix and chemical reactivity all lead to the inhomogeneity of the structure and performance of the cladding layer
Moreover, the prepared combined powder is prone to segregation during storage, transportation and use due to the large difference in the specific gravity of each component.
Commercial market supply is not possible, and there is no commercial sale of special powder for particle-enhanced laser cladding in the market
Due to the above reasons, there is no special combination powder for laser cladding, which restricts the application of laser cladding in the field of high wear-resistant conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A laser cladding highly wear-resistant silicide particle enhanced laser cladding high wear-resistant cobalt-based alloy powder and its preparation method, the silicide particle-enhanced laser cladding high wear-resistant cobalt-based alloy powder is composed of matrix alloy powder and silicide hard Composed of solid particles and binder, the proportion is: 60% matrix alloy powder, 37% SiC, 3% phenolic resin binder to prepare combined powder; wherein the chemical composition and mass percentage of the matrix alloy are;

[0049] 0.3%C, 4%Si, 2.5%B, 2.6%Cr, 1.5%W, 2.2%Mn, 0.3%Nb, 2.5%Ni, 13%Fe, 0.1%MgO, 0.5%CaF 2 , 0.2% CeO 2 , 0.2%Y 3 o 2 , 0.2% La 2 o 3 , Co balance.

[0050] Its manufacturing process steps:

[0051] Preparation of matrix alloy powder→adding silicide particles→adding binder→stirring ball milling→combining powder→drying→crushing→sieving; the specific process steps are as follows:

[0052] (1) Preparation of matrix alloy

[0053] The process flow o...

Embodiment 2

[0071] A laser cladding highly wear-resistant silicide particle enhanced laser cladding high wear-resistant cobalt-based alloy powder and a preparation method thereof, the silicide particle-enhanced laser cladding high wear-resistant cobalt-based alloy powder is composed of matrix alloy powder and silicide particles Composed of and binder, the ratio is: 68% matrix alloy powder, 30% Si 3 N 4 , 2% epoxy resin binder is prepared into combined powder; wherein the chemical composition and mass percentage of the matrix alloy are;

[0072] 0.2%C, 5%Si, 3%B, 1.5%Cr, 2.0%W, 2.5%Mn, 0.2%Nb, 3%Ni, 12%Fe, 0.15%MgO, 0.9%CaF 2 , 0.25% CeO 2 , 0.25%Y 3 o 2 , 0.25% La 2 o 3 , Co balance.

[0073] (2) Add silicide particles

[0074] Select the commercially available Si with a particle size range of -300 mesh 3 N4 Powder as reinforced hard particles;

[0075] (3) Add binder

[0076] Use thermosetting epoxy resin as binder, add methanol solvent to dissolve it into a resin solution;

...

Embodiment 3

[0081] A laser cladding highly wear-resistant silicide particle enhanced laser cladding high wear-resistant cobalt-based alloy powder and a preparation method thereof, the laser cladding highly wear-resistant silicide particle enhanced laser cladding high wear-resistant cobalt-based alloy powder consists of a matrix Composed of alloy powder, silicide hard particles and binder, the ratio is: 68% matrix alloy powder, 30% MoSi 2 Powder is made, and 2% epoxy resin binder is prepared into composite powder; Wherein the chemical composition of matrix alloy and its mass percent are;

[0082] 0.4%C, 2.8%Si, 2.0%B, 3%Cr, 2.5%W, 1.8%Mn, 0.25%Nb, 2.0%Ni, 10%Fe, 0.2%MgO, 1.5%CaF 2 , 0.3% CeO 2 , 0.3%Y 3 o 2 , 0.3% La 2 o 3 , Co balance.

[0083] (2) Add silicide particles

[0084] Select the commercially available MoSi with a particle size range of -200 mesh 2 Powder as reinforced hard particles;

[0085] (3) Add binder

[0086] Water glass is used as binder, and methanol solvent...

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PUM

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Abstract

The invention provides silicide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and a preparation method thereof. The powder is characterized by comprising matrix alloy powder, silicide particles and binders; and combined powder is prepared from 50-98% of matrix alloy powder, 1-45% of one of or combined mixture powder of more than two of SiC or Si3N4, MoSi2 and CoSi2 and 1-5% of binders. The preparation method comprises the steps of matrix alloy powder preparation, silicide particle addition, binder addition, stirring and ball milling, combined powder preparation, drying, grinding and screening. The powder has higher hardness and toughness and excellent abrasion resistance and corrosion resistance, is especially suitable for laser cladding of high impact and high abrasion resistance parts, and can effectively prevent segregation caused by great difference of specific weights of the components in the storage, transport and use processes.

Description

technical field [0001] The invention belongs to the technical field of cobalt-based alloys, and relates to a silicide particle-enhanced laser cladding alloy powder and a preparation method thereof, in particular to a silicide particle-enhanced laser cladding high-wear-resistant cobalt-based alloy powder and a preparation method thereof. High wear-resistant silicide particle reinforced cobalt-based alloy powder is suitable for laser cladding of parts under high wear-resistant conditions. Background technique [0002] In modern daily life and industrial production, wear and corrosion of metal materials will appear in various fields. It is one of the two main ways to damage mechanical parts and engineering components. Corrosion will lead to a large amount of consumption of mechanical parts, while wear It is one of the important reasons leading to the failure of mechanical parts. While they consume a lot of metal materials, they also waste a lot of resources, accounting for a v...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08C22C19/07C22C32/00
Inventor 丁刚丁家伟耿德英谢宗翰王爱华郭洪才印杰孙健唐华平
Owner 江苏新亚特钢锻造有限公司
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