Highly corrosion-proof abrasion-proof iron matrix amorphous nanocrystalline coating and its preparation method

An iron-based amorphous and nanocrystalline technology, used in coatings, metal material coating processes, liquid injection devices, etc., to achieve the effect of excellent comprehensive performance of corrosion resistance and wear resistance

Inactive Publication Date: 2006-02-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the preparation of a single amorphous coating or nanostructured coating by thermal spraying technology in the past, the present invention utilizes nanotechnology to improve the wear resistance of materials, and the characteristics of amorphization technology to improve material corrosion resistance. Combined with the amorphization technology, it is proposed to use the amorphous alloy powder as the spraying powder, and use the supersonic flame spraying method to prepare an amorphous coating, and then heat treat the coating to make it partly crystallized, forming both The amorphous structure contains nanostructured amorphous nanocrystalline composite coating, which has excellent comprehensive performance of corrosion resistance and wear resistance

Method used

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  • Highly corrosion-proof abrasion-proof iron matrix amorphous nanocrystalline coating and its preparation method
  • Highly corrosion-proof abrasion-proof iron matrix amorphous nanocrystalline coating and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0014] The composition of iron-based multi-element amorphous alloy powder is calculated by weight percentage: 0.9%C, 3.8%Si, 4.1%B, 6.5%Cr, 11.5%W, 6.7%Mo, 4.5%Ni, 0.2%Y, the rest The most important is Fe, and the particle size of the powder ranges from 15 to 45 microns. The coating is first prepared by supersonic flame spraying on the 0Cr13Ni5Mo stainless steel substrate, and then the coating is heat treated. Spraying parameters are: oxygen pressure 1.0MPa, propane pressure 0.7MPa, air pressure 0.7MPa, oxygen flow rate 240L / min, propane flow rate 68L / min, air flow rate 375L / min, powder feeding speed 60g / min, spraying distance 210mm, heat treatment parameters For: the temperature is 600°C and the time is 2 hours.

Embodiment 2

[0016] The composition of the selected iron-based multi-element amorphous alloy powder is calculated by weight percentage: 0.5%C, 2.8%Si, 5.9%B, 4.5%Cr, 14.5%W, 4.7%Mo, 3.5%Ni, 0.5%Y, The remainder is Fe, and the particle size of the powder ranges from 15 to 45 microns. The coating is first prepared by supersonic flame spraying on the 0Cr13Ni5Mo stainless steel substrate, and then the coating is heat treated. Spraying parameters are: oxygen pressure 1.0MPa, propane pressure 0.7MPa, air pressure 0.7MPa, oxygen flow rate 240L / min, propane flow rate 68L / min, air flow rate 375L / min, powder feeding speed 60g / min, spraying distance 210mm, heat treatment parameters For: the temperature is 600°C, and the time is 1.5 hours.

Embodiment 3

[0018] The composition of the selected iron-based multi-element amorphous alloy powder is calculated by weight percentage: 1.1%C, 5.5%Si, 3.2%B, 7.8%Cr, 10.5%W, 8.7%Mo, 9.3%Ni, 1.2%Y, The remainder is Fe, and the particle size of the powder ranges from 15 to 45 microns. The coating is first prepared by supersonic flame spraying on the 0Cr13Ni5Mo stainless steel substrate, and then the coating is heat treated. Spraying parameters are: oxygen pressure 1.0MPa, propane pressure 0.7MPa, air pressure 0.7MPa, oxygen flow rate 240L / min, propane flow rate 68L / min, air flow rate 375L / min, powder feeding speed 60g / min, spraying distance 210mm, heat treatment parameters For: the temperature is 600°C and the time is 3 hours.

[0019] Example 1 was selected for coating analysis.

[0020] Crystal structure of the coating

[0021] figure 1 It is the X-ray diffraction pattern of supersonic flame sprayed iron-based coating. It can be seen from the figure that the coating is a typical amorph...

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Abstract

A highly corrosion-proof abrasion-proof iron matrix amorphous nanocrystalline coating and its preparation method consists of, integrating nano technique with non-crystallizing technique, and comprises using Fe-based multielement amorphous alloy powder as spraying powder, making amorphous coating through supersonic flame-spraying, then transforming into amorphous and nanocrystalline composite coating through heat treatment method.

Description

technical field [0001] The invention relates to an iron-based alloy coating, in particular to the preparation of an amorphous nanocrystalline composite coating. Background technique [0002] Amorphous materials and nanocrystalline materials have more unique and excellent properties than traditional materials, and are promising new materials. However, in practice, until now, these materials have not been widely used. The main factor is that their preparation process is difficult to control. In practice, it is difficult to prepare bulk amorphous and nanocrystalline materials, and their applications are mainly limited to thin films. On low-dimensional shapes such as ribbons, filaments, and powders. Relatively speaking, the preparation process of amorphous and nanocrystalline coatings is relatively easy to realize. Among many methods of preparing coatings, thermal spraying technology is a very competitive technology, and it is also a very promising technology. In thermal spray...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/12C22C45/02B05B7/20C23C4/129
Inventor 樊自拴孙冬柏孟惠民俞宏英王旭东
Owner UNIV OF SCI & TECH BEIJING
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