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Laser preparation method of iron-based amorphous nanometer crystalline coat

An iron-based amorphous and nanocrystalline technology, which can be used in coatings, metal material coating processes, etc., can solve problems such as preparation and processing difficulties, and achieve the effects of reducing raw material costs, high interface bonding strength, and wide application range.

Inactive Publication Date: 2010-12-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its preparation and processing difficulties, the application of amorphous and nanocrystalline materials is mainly limited to low-dimensional shapes such as thin ribbons, filaments, and powders.

Method used

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  • Laser preparation method of iron-based amorphous nanometer crystalline coat
  • Laser preparation method of iron-based amorphous nanometer crystalline coat
  • Laser preparation method of iron-based amorphous nanometer crystalline coat

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The composition of the cladding powder material is calculated by weight percentage: 29.5% Ni, 18% Si, 18% B, 2% Nb, 3% Cr, the rest is Fe, and the particle size range of the powder is 75-150 microns. First, the iron-based alloy coating was prepared on the low-carbon low-alloy steel CCS-B substrate by laser cladding, and then the coating surface was subjected to laser rapid remelting treatment. Laser cladding parameters are: laser power 5.5KW, spot diameter 5mm, cladding speed 500mm / min, powder feeding volume 20g / min, side blowing argon gas flow rate 20L / min. The laser remelting parameters are: laser power 14KW, spot diameter 4mm, scanning speed 8m / min, argon gas flow 30L / min.

[0017] Such as figure 1 As shown, the coating structure is a black nano-scale particle phase distributed on a white substrate. The amorphous halo of the white matrix indicates that the matrix is ​​an amorphous phase, and the diffraction spots of the black rod-shaped particle phase indicate that...

Embodiment 2

[0019] The composition of the cladding powder material is calculated by weight percentage: 30.25% Ni, 18% Si, 18% B, 2% Nb, 1.5% Y, the rest is Fe, and the particle size range of the powder is 75-150 microns. First, the iron-based alloy coating was prepared on the low-carbon low-alloy steel CCS-B substrate by laser cladding, and then the coating surface was subjected to laser rapid remelting treatment. Laser cladding parameters are: laser power 5.5KW, spot diameter 5mm, cladding speed 500mm / min, powder feeding volume 20g / min, side blowing argon gas flow rate 20L / min. The laser remelting parameters are: laser power 14KW, spot diameter 4mm, scanning speed 8m / min, argon gas flow 30L / min.

[0020] Such as figure 2 As shown, the coating structure is nano-sized black particles dispersed on the white substrate. The amorphous halo of the white matrix indicates that the matrix is ​​an amorphous phase, and the diffraction spots of black particles indicate that the organization is γ-(...

Embodiment 3

[0022] The composition of the cladding powder material is the same as in Example 2, calculated by weight percentage: 30.25% Ni, 18% Si, 18% B, 2% Nb, 1.5% Y, and the rest is Fe; but the pure element is added in Example 2 The powders are different. The cladding powder in this embodiment is added in the form of pure iron powder, pure nickel powder, ferrosilicon powder, ferroboron powder, niobium ferrosilicon powder and rare earth yttrium-based ferrosilicon powder, and the cost of raw materials is greatly reduced; after mixing, ball milling After 1 hour, the particle size of the powder ranged from 75-150 microns. First, the iron-based alloy coating was prepared on the low-carbon low-alloy steel CCS-B substrate by laser cladding, and then the coating surface was subjected to laser rapid remelting treatment. Laser cladding parameters are: laser power 5.5KW, spot diameter 5mm, cladding speed 500mm / min, powder feeding volume 20g / min, side blowing argon gas flow rate 20L / min. The las...

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Abstract

The invention provides a laser preparation method of an iron-based amorphous nanometer crystalline coat, belonging to the technical field of coating a surface. The method comprises the following steps of: transporting laser melted and coated metal powder by means of side shaft synchronous powder transportation; melting and coating under the argon protection atmosphere to be formed into an iron-based alloy coat; and remelting by means of laser into the iron-based amorphous nanometer crystalline coat. The laser preparation method leads the coat to have smaller element segregation and even component distribution in fine equiaxial structure, leads a melting pond and a melting body to have higher glass forming capability, and is good for forming the amorphous nanometer crystalline tissue.

Description

technical field [0001] The invention relates to a method in the technical field of surface coating, in particular to a laser preparation method of an iron-based amorphous nanocrystalline coating. Background technique [0002] Due to their unique structures and excellent properties, amorphous and nanocrystalline materials have attracted great attention. However, due to its preparation and processing difficulties, the application of amorphous and nanocrystalline materials is mainly limited to low-dimensional shapes such as thin ribbons, filaments, and powders. Relatively speaking, it is relatively easy to prepare amorphous and nanocrystalline coatings on the surface of substrates by using surface coating technology. The preparation of iron-based amorphous nanocrystalline coatings on the surface of parts is not only low cost, but also can greatly improve the wear resistance and corrosion resistance of the parts surface. It has broad application prospects and has become the cur...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C45/02
Inventor 张培磊李铸国黄坚
Owner SHANGHAI JIAO TONG UNIV
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