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Laser spot shaping device and method for preparing single cladding layer

A technology of laser spot and shaping device, which is applied in optics, coatings, optical components, etc., can solve the problems of uneven heating of circular Gaussian spot, low thickness of single-layer cladding layer, and high lap rate, so as to improve cladding. Efficiency, widening lateral coverage, smooth surface effect

Active Publication Date: 2021-03-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention firstly provides a laser spot shaping device for the defects of uneven heating and high overlap rate of the circular Gaussian spot in the laser cladding process
[0006] The present invention also provides a method for preparing a single-layer high-thickness and high-hardness cladding layer using the laser spot shaping device to address the defects of low thickness, low hardness and many cracks in the single-layer cladding layer in the existing laser cladding method

Method used

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  • Laser spot shaping device and method for preparing single cladding layer
  • Laser spot shaping device and method for preparing single cladding layer
  • Laser spot shaping device and method for preparing single cladding layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]Step S1: The 9Cr2MO base 10 having a size of 100 mm × 100 mm × 20 mm is prepared, and the surface of the substrate 10 is prepared, and the surface stain and the oxide pretreatment are removed;

[0055]Step S2: Place the substrate 10 in a thermostat of 350 ° C for 0.5 h, preheating;

[0056]Step S3: Set the laser welding process parameter: the laser output power is 4000W, the scanning speed is 300mm / min, the amount of powder is 15 g / min, the extraction is 68mm, the argon gas flow is 20L / min, the road is lapsed The rate is 10%, and the laser beam is bleed, and the laser beam is generated, and a flat rectangular spot of 3 mm × 1 mm is formed.

[0057]Step S4: 5% of the WC ceramic particle reinforcement phase was added to the Fe based alloy powder having a powder particle size of 50 μm, and the molten coating was carried out by a single layer of a single layer, the synchronous powder feed mode, so that the alloy powder was reacted with the substrate 10, resulting in a sample ;

[0058]S...

Embodiment 2

[0062]Step S1: The 9Cr2MO base 10 having a size of 100 mm × 100 mm × 20 mm is prepared, and the surface of the substrate 10 is prepared, and the surface stain and the oxide pretreatment are removed;

[0063]Step S2: Place the substrate 10 in a thermostat of 350 ° C for 0.5 h, preheating;

[0064]Step S3: Set the laser welding process parameter: the laser output power is 4000W, the scanning speed is 300mm / min, the amount of powder is 15 g / min, the extraction is 68mm, the argon gas flow is 20L / min, the road is lapsed The rate is 20%, and the laser beam is generated by the laser photometric shaping device, and a flat top square spot of 2 mm × 2 mm is formed;

[0065]Step S4: Add 10% WC ceramic particle reinforcement phase to the FE-based alloy powder having a powder particle size of 70 μm, and is subjected to a single layer, a synchronous powder feed mode, so that the alloy powder is reacted with the substrate 10 to obtain a sample. ;

[0066]Step S5: In order to further improve the surface ...

Embodiment 3

[0070]Step S1: The 9Cr2MO base 10 having a size of 100 mm × 100 mm × 20 mm is prepared, and the surface of the substrate 10 is prepared, and the surface stain and the oxide pretreatment are removed;

[0071]Step S2: Place the substrate 10 in a thermostat of 350 ° C for 0.5 h, preheating;

[0072]Step S3: Set the laser welding process parameter: the laser output power is 4000W, the scanning speed is 300mm / min, the amount of powder is 15 g / min, the extraction is 68mm, the argon gas flow is 20L / min, the road is lapsed The rate is 50%, and the laser beam is generated by the above laser photometric shaping device, and the flat-top circular spot of R = 1 mm is formed.

[0073]Step S4: Add 15% WC ceramic particle reinforcement phase in a Fe base alloy powder having a powder particle size of 90 μm, and is subjected to a single layer, a synchronous feed powder, so that the alloy powder is reacted with the substrate 10 to obtain a sample. ;

[0074]Step S5: In order to further improve the surface l...

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Abstract

The invention provides a laser spot shaping device and a method for preparing a single cladding layer. The method comprises the following steps that laser technological parameters are set, the a laserbeam is bunched through the laser spot shaping device, and the laser beam is shaped into a flat-top light spot with a certain shape and size; and a base body is preheated at a certain temperature before cladding, then a WC ceramic particle reinforced phase with a certain ratio is added into cladding powder, cladding is carried out by adopting a mode of single-layer multi-channel overlapping and synchronous powder feeding, finally remelting treatment is carried out after cladding is finished, and a sample is taken out and treated in an air cooling mode. The method for preparing a single cladding layer has the advantages of simple structure and low manufacturing cost. The cladding layer with high thickness, high hardness and low crack generation rate can be prepared by the method, and the cladding layer has the advantages of high bonding strength, short preparation time, high efficiency, uniform heating, smooth surface, few cladding defects and the like.

Description

Technical field[0001]The present invention relates to the field of laser surface modification technology, and more particularly to a laser photometric shaping device and a method of preparing a single layer of cladding layer, a high thickness of 9Cr2MO cold rolling roller steel is adapted.Background technique[0002]9Cr2MO material is a typical steel steel for CR2-based cold rolling rolls, mainly used to make cold-rolled rollers, rolling rollers, cold stamping and flux, and the like. Laser cladding is a new surface modification technique raised by the development of high-power lasers in the 1970s. It is the purpose of reaching surface modification or repair by improving the surface hardness, strength, and wear resistance of the substrate.[0003]However, with the increase of the working load of modern machinery, the 9Cr2MO material is easily produced by defects such as wear, falling off, and the anti-high pressure capacity of low thickness, and the anti-high pressure capacity have been ...

Claims

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Application Information

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IPC IPC(8): C23C24/10G02B27/09
CPCC23C24/103G02B27/0927G02B27/0955G02B27/0977G02B27/0944
Inventor 崔承云姜高强陈凯赵恺崔熙贵
Owner JIANGSU UNIV
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