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Plasma melting coating iron-base amorphous nano-crystalline coat and preparing method thereof

A plasma cladding, amorphous and nanocrystalline technology, applied in coating, metal material coating process, etc., can solve the problems of high cost, poor bonding force between coating and substrate, etc., and achieve good thermal stability and excellent wear resistance Corrosion resistance and production cost reduction effects

Inactive Publication Date: 2007-09-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a plasma cladding iron-based amorphous nanocrystalline coating and its preparation method, which overcomes the problems of poor bonding between the coating and the substrate or high cost in the original preparation of the amorphous nanocrystalline coating technology. Insufficient, the prepared alloy coating is metallurgically bonded to the substrate

Method used

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  • Plasma melting coating iron-base amorphous nano-crystalline coat and preparing method thereof
  • Plasma melting coating iron-base amorphous nano-crystalline coat and preparing method thereof
  • Plasma melting coating iron-base amorphous nano-crystalline coat and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The composition of multi-element alloy powder is calculated by weight percentage: C 0.5-3.0, B 2-5, Si 2-6, P 0.9-3.0, Mo 12.0-26.0, Ni 5.0-15.0, Cr 2.0-15.0, Re 0.8- 3.0, Fe balance, particle size range 106-180 microns. Prepare the coating on the A3 steel substrate by plasma cladding, the cladding process parameters are: use Ar as the protective and ionized gas, and the flow rate of the powder feeding argon gas is 0.2-0.8m 3 / h, the protective argon flow rate is 0.4-1.0m 3 / h, the ionized gas flow rate is 0.5-1.2m 3 / h, the current is 280-380A, and the scanning speed is 350-480mm / min.

Embodiment 2

[0020] The composition of multi-element alloy powder is calculated by weight percentage: C 0.5-3.0, B 0.5-1.0, Si 1-3.5, P 0.9-3.0, Mo 12.0-26.0, Ni 5.0-15.0, Cr 2.0-15.0, Re 0.8- 3.0, Fe balance, particle size range 106-180 microns. Prepare the coating on the A3 steel substrate by plasma cladding, the cladding process parameters are: use Ar as the protective and ionized gas, and the flow rate of the powder feeding argon gas is 0.2-0.8m 3 / h, the protective argon flow rate is 0.4-1.0m 3 / h, the ionized gas flow rate is 0.5-1.2m 3 / h, the current is 280-380A, and the scanning speed is 350-480mm / min.

Embodiment 3

[0022] The composition of multi-element alloy powder is calculated by weight percentage: C 0.5-3.0, B 0.5-1.0, P 1.0-2.0, Al 2.5-3.0, Mo 18.0-25.0, Ni 7.0-10.0, Cr 4.0-8.0, Zr 2.5- 3.0, Fe balance, particle size range 106-180 microns. Prepare the coating on the A3 steel substrate by plasma cladding, the cladding process parameters are: use Ar as the protective and ionized gas, and the flow rate of the powder feeding argon gas is 0.2-0.8m 3 / h, the protective argon flow rate is 0.4-1.0m 3 / h, the ionized gas flow rate is 0.5-1.2m 3 / h, the current is 280-380A, and the scanning speed is 350-480mm / min.

[0023] Select embodiment 1 to do coating analysis.

[0024] Crystal structure of the coating

[0025] Figure 1 is a photo of the cross-sectional morphology of the plasma cladding iron-based coating. It can be seen that the coating has an overlapping morphology. The coating and the substrate are in good metallurgical bonding, and there are few defects such as cracks, pores, an...

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Abstract

This invention relates to plasma cladding Fe base non-crystal nanometer crystal foating and its preparation method, in which, the cladding material includes the following components in weight percentages: C 0.5-3.0, B 2-5, Si 2-6, P 0.9-3.0, Mo 12.0-26.0, Ni 5.0-15.0, Cr 2.0-15.0, Re 0.8-3.0 and Fe for the rest the size is 106-180mum. The preparation method includes: cladding plasma on an A3 steel base to prepare a coating in the following technical parameters: Ar is the protection and ionization gas, the Ar flow for transmitting powder is 0.2-0.8m3 / h, the protection flow is 0.4-1.0m3 / h, the ionization gas flow is 0.5-1.2m3 / h, the current is 280-380A and the scan speed is 350-480mm / min. Advantage: a non-crystal nanometer crystal compound coating containing either a non-crystal structure or a nanometer structure is prepared having excellent performance of wear resistance and anti-corrosion.

Description

technical field [0001] The invention relates to the technical field of plasma cladding alloy coatings, in particular to a plasma cladding iron-based amorphous nanocrystalline coating and a preparation method thereof. Background technique [0002] Amorphous nanocrystalline materials have more excellent properties than traditional materials, such as higher strength, hardness and excellent wear resistance and corrosion resistance, so they are a new type of material with great development prospects. In recent years, the preparation technology of amorphous and nanocrystalline coatings has also been continuously developed, but the difficulty of preparing bulk amorphous and nanocrystalline materials has seriously affected the practical application of amorphous and nanocrystalline materials. Relatively speaking, it is more beneficial to prepare amorphous and nanocrystalline surface layers on the surface of materials. Therefore, amorphous, nanocrystalline and amorphous nanocrystalli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 樊自拴张丽娜王勇孙冬柏孟惠民俞宏英王旭东
Owner UNIV OF SCI & TECH BEIJING
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