Iron-based amorphous coating and laser preparation method thereof

An iron-based amorphous and coating technology, which is applied in coatings, metal material coating processes, etc., can solve the problems of changing the shape and size of parts, low corrosion resistance of coatings, and excessive thickness of coatings, etc., to achieve excellent Corrosion resistance, high interfacial bonding strength, and high industrial value

Active Publication Date: 2015-04-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology uses a large number of alloying elements, even including rare earth elements, and the cost is high; the obtained iron-based amorphous coating is not completely amorphous, and the corrosion resistance of the coating is low; the coating thickness is too thick, Will change the shape and size of the part to a greater extent

Method used

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  • Iron-based amorphous coating and laser preparation method thereof
  • Iron-based amorphous coating and laser preparation method thereof
  • Iron-based amorphous coating and laser preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Cladding powder pretreatment

[0020] The composition of the cladding powder material is calculated by weight percentage: 60% Fe, 25% Cr, 5% Ni, 2.5% Si, 1.5% B, 4% C, 2% W, and the particle size range of the powder is 60-150 microns , and dried in a vacuum oven at 80°C for 2 hours.

[0021] (2) Preparation of iron-based alloy coating

[0022] Put the metal cladding powder in (1) into an automatic powder feeder (commercially available, RC-PGF-D-1) for synchronous powder feeding, using a continuous fiber laser, on the surface of 45# steel (150mm×42mm×20mm) Prepare a layer of iron-based alloy coating. The specific operation is: place 45# steel flat on the processing table, fix it with a fixture, calibrate the laser starting coordinates, and set the laser process parameters as follows: laser power 200W, spot diameter 1mm, lap rate 0.3, scanning speed 400mm / min, synchronous powder feeding volume 6g / min, protective argon flow rate 15L / min. Cool to room temperature whe...

Embodiment 2

[0027] (1) Cladding powder pretreatment

[0028] The composition of the cladding powder material is calculated by weight percentage: 55% Fe, 30% Cr, 5% Ni, 3.5% Si, 2% B, 4.5% C, the particle size range of the powder is 60-150 microns, and the Dry in a drying oven at 80°C for 2 hours.

[0029] (2) Preparation of iron-based alloy coating

[0030] Put the metal cladding powder in (1) into an automatic powder feeder (commercially available, RC-PGF-D-1) for synchronous powder feeding, using a continuous fiber laser, on the surface of 45# steel (150mm×42mm×20mm) Prepare a layer of iron-based alloy coating. The specific operation is: place 45# steel flat on the processing table, fix it with a fixture, calibrate the laser starting coordinates, and set the laser process parameters as follows: laser power 800W, spot diameter 2mm, lap rate 0.3, scanning speed 800mm / min, synchronous powder feeding volume 15g / min, protective argon gas flow rate 20L / min. Cool to room temperature when do...

Embodiment 3

[0035] (1) Cladding powder pretreatment

[0036] The composition of the cladding powder material is calculated by weight percentage: 57% Fe, 30% Cr, 6% Ni, 4% Si, 1% B, 2% C, the particle size range of the powder is 60-150 microns, and the Dry in a drying oven at 80°C for 2 hours.

[0037] (2) Preparation of iron-based alloy coating

[0038] Put the metal cladding powder in (1) into an automatic powder feeder (commercially available, RC-PGF-D-1) for synchronous powder feeding, using a continuous fiber laser, on the surface of 45# steel (150mm×42mm×20mm) Prepare a layer of iron-based alloy coating. The specific operation is: place 45# steel flat on the processing table, fix it with a fixture, calibrate the laser starting coordinates, and set the laser process parameters as follows: laser power 300W, spot diameter 1mm, lap rate 0.3, scanning speed 300mm / min, synchronous powder feeding volume 8g / min, protective argon flow rate 20L / min. Cool to room temperature when done.

[0...

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Abstract

The invention discloses a laser preparation method of an iron-based amorphous coating. A formula formed by all the elements of the iron-based amorphous coating according to the weight percent is FeaCrbNicSidBeCf, wherein the sum of b, c, d, e and f is not more than 50. Powder can be used after the components are uniformly mixed in proportion according to a required weight ratio. Powder is fed by synchronous powder feeding and is cladded in an argon protection atmosphere to prepare an iron-based alloy coating and the iron-based alloy coating is subjected to laser remelting to prepare the iron-based amorphous coating. The prepared coating has few defects and higher corrosion resistance and has a whole amorphous structure.

Description

technical field [0001] The invention belongs to the technical field of surface coatings, and in particular relates to an iron-based amorphous coating and a laser preparation method thereof. Background technique [0002] Compared with traditional crystal materials, amorphous alloys have high yield strength, high hardness, high elastic modulus, and good corrosion resistance. The iron-based amorphous system has attracted more and more material researchers because of its abundant natural resources, low material cost, excellent mechanical, chemical, magnetic, corrosion resistance, and potential industrial applications. Notice. [0003] However, usually the alloy needs to be cooled at a very high rate to form an amorphous alloy, and its glass-forming ability limits the shape and maximum size of the amorphous sample, so the amorphous product is mostly a film, strip, filament or powder, plus The plasticity of bulk amorphous alloys at room temperature is poor, and structural materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00C22C45/02
CPCB22F1/0003C22C45/02C23C24/10
Inventor 陈光李培源王建成李沛
Owner NANJING UNIV OF SCI & TECH
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