A kind of laser cladding Fe-based Cr3C2 composite coating adding nanometer Ti and preparation method thereof

A technology of laser cladding and composite coating, applied in the direction of coating, metal material coating process, etc., can solve the problems of high brittleness of the coating, poor compatibility of the substrate, easy to produce cracks, etc. Good toughness, the effect of promoting melting

Active Publication Date: 2018-05-15
ANHUI MA STEEL SURFACE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the invention is to overcome the use of Cr in the prior art 3 C 2 When enhancing laser cladding of iron-based alloy coatings, when Cr 3 C 2 When the additive amount is large, the brittleness of the coating is large, cracks are easy to occur, and the compatibility with the substrate is poor. A laser cladding Fe-based Cr coating with nano-Ti is provided. 3 C 2 Composite coating and preparation method thereof

Method used

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  • A kind of laser cladding Fe-based Cr3C2 composite coating adding nanometer Ti and preparation method thereof
  • A kind of laser cladding Fe-based Cr3C2 composite coating adding nanometer Ti and preparation method thereof
  • A kind of laser cladding Fe-based Cr3C2 composite coating adding nanometer Ti and preparation method thereof

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Embodiment 1

[0045] A laser cladding Fe-based Cr with nano-Ti added in this embodiment 3 C 2 The composite coating is prepared by laser cladding with the following mass percentage components: 69% iron-based self-fluxing alloy powder, nano-Cr 3 C 2 30% alloy powder and 1% nano-Ti powder, wherein the Fe-based self-fluxing alloy powder consists of the following components by mass percentage: C0.1%, Cr16%, Ni8%, Si2.5%, B1.2%, Mo0.5%, Fe is the balance, and its particle size is about 65 μm. In this embodiment, nano-Cr is added to the cladding powder 3 C 2 , due to nano-Cr 3 C 2 It is easier to be melted during the plasma surfacing process, therefore, when Cr 3 C 2 When the addition amount is the same, the nano-Cr 3 C 2 Cr in powder 3 C 2 The amount of melting is more than micron Cr 3 C 2 , while nano-Cr 3 C 2 The powder contains more particles and the distribution is more dispersed, which increases the number of non-spontaneous nucleation cores and significantly refines the coa...

Embodiment 2

[0076] A laser cladding Fe-based Cr with nano-Ti added in this embodiment 3 C 2 The composite coating is prepared by laser cladding with the following mass percentage components: 59% iron-based self-fluxing alloy powder, nano-Cr 3 C 2 40% alloy powder and 1% nano-Ti powder, wherein the Fe-based self-fluxing alloy powder consists of the following components by mass percentage: C0.2%, Cr18%, Ni7%, Si2.0%, B0.8%, Mo is 0.6%, Fe is the balance, and its particle size is 100 μm. In this embodiment, nano-Cr is added to the cladding powder 3 C 2 , due to nano-Cr 3 C 2 It is easier to be melted during the plasma surfacing process, therefore, when Cr 3 C 2 When the addition amount is the same, the nano-Cr 3 C 2 Cr in powder 3 C 2 The amount of melting is more than micron Cr 3 C 2 , while nano-Cr 3 C 2 The powder contains more particles and the distribution is more dispersed, which increases the number of non-spontaneous nucleation cores and significantly refines the coat...

Embodiment 3

[0088] A laser cladding Fe-based Cr with nano-Ti added in this embodiment 3 C 2 The composite coating is prepared by laser cladding with the following mass percentage components: 71% iron-based self-fluxing alloy powder, nano-Cr 3 C 2 28.5% alloy powder and 0.5% nano-Ti powder, wherein the Fe-based self-fluxing alloy powder is composed of the following components in mass percentage: C0.15%, Cr15%, Ni6.5%, Si2.3%, B1.0 %, Mo0.6%, Fe is the balance, and its particle size is 180 μm. In this embodiment, nano-Cr is added to the cladding powder 3 C 2 , due to nano-Cr 3 C 2It is easier to be melted during the plasma surfacing process, therefore, when Cr 3 C 2 When the addition amount is the same, the nano-Cr 3 C 2 Cr in powder 3 C 2 The amount of melting is more than micron Cr 3 C 2 , while nano-Cr 3 C 2 The powder contains more particles and the distribution is more dispersed, which increases the number of non-spontaneous nucleation cores and significantly refines th...

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Abstract

The invention discloses a nano Ti-added laser cladding Fe-based Cr3C2 composite coating and a preparation method thereof, and belongs to the technical field of a surface coating and a preparation method thereof. By virtue of laser cladding, the nano Ti-added laser cladding Fe-based Cr3C2 composite coating is prepared from the following components in percentage by mass: 59%-79% of iron-based self-melting alloy powder, 20%-40% of nano Cr3C2 alloy powder and 0.5%-1% of nano Ti powder. The preparation method for the laser cladding composite coating comprises the following steps: preparing powder, uniformly mixing and drying the powder, preparing a coating and carrying out after-treatment on the coating. According to the technical scheme adopted by the invention, the hardness and the wear resistance of the nano Ti-added laser cladding Fe-based Cr3C2 composite coating can be further improved, the toughness of the coating can be obviously improved, the compatibility between the coating and matrix is improved, and coating cracks can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of surface coating and preparation method thereof, more specifically, relates to a laser cladding Fe-based Cr coating with nano-Ti added 3 C 2 Composite coating and method for its preparation. Background technique [0002] The wear of material surface is one of the main reasons for the failure of engineering parts. The wear causes large economic losses to countries every year. Therefore, it is very important to improve the surface properties of materials, especially to improve their wear resistance. As one of the methods of surface strengthening and material protection, laser cladding technology uses a high-energy-density laser beam as a heat source to deposit a layer of alloy powder with special properties on the surface of a common metal substrate, thereby significantly improving the surface of the base metal. Performance, greatly extending the service life of parts. Compared with traditional surface mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/103
Inventor 斯松华刘月龙徐志鹏李飞张磊
Owner ANHUI MA STEEL SURFACE TECH CO LTD
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