Roller surface laser texturing and micro-alloying composite processing method

A technology of laser texturing and roll surface, applied in metal processing equipment, laser welding equipment, manufacturing tools, etc., can solve the problem of shallow fusion pit depth, limited improvement in strength and friction and wear performance, and insufficient texturing point bosses and other problems, to achieve the effect of strengthening hardness and friction and wear performance, height improvement, and clear edges of textured points

Inactive Publication Date: 2008-02-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this texturing method uses auxiliary gas to directly condense the surface of the roll. The depth of the melting pit is shallow and the boss of the texturing point is not obvious enough, which affects the rolling effect of the roll and the quality of the rolled cold-rolled plate.
At the same time, the hardness, strength and friction and wear performance of the textured point, especially the flange of the textured point, are limited.

Method used

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  • Roller surface laser texturing and micro-alloying composite processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Firstly, a mixture of alloy micropowder and latex needs to be prepared. The alloy micropowder is WC+TiC+Co mixed powder with a particle size of 2-4 μm. Use 2123 phenolic resin and alcohol to make latex with a concentration of 13%, then mix the prepared latex and alloy powder evenly according to the volume ratio of about 6:1, and spray it on the surface of the GCr15 roll cleaned by ethanol through a spray gun, so that The alloy powder is closely and evenly combined with the roll, and at the same time increases the absorption of laser light energy on the roll surface. Due to the volatility of alcohol, the coating dries quickly. Thin film coating thickness ranges from 0-0.5mm. Alloy powder can be sprayed before laser texturing or laser texturing and spraying at the same time. After the surface film of the roll is prepared, it is textured with pulsed laser beams, and after the texturing is completed, the untextured part is cleaned with alcohol or acetone. Duri...

Embodiment 2

[0019] Embodiment 2: WC-Cr powder (30% by weight of Cr) is selected as the alloy powder, and the particle size is less than 10 μm. Use 2123 phenolic resin and acetone to make latex with a concentration of 13%, then mix the prepared latex and alloy powder according to the volume ratio of about 2:1, and the thickness of the film coating varies from 0-0.5mm as required. The method of spraying treatment is the same as that of Embodiment 1. After texturing, compared with the direct texturing method, the depth and height of the texturing pits are increased. The hardness of the coating reaches about HV900, and the wear resistance of the surface increases by about 10% under dry friction.

Embodiment 3

[0020] Embodiment 3: WC-Co powder (Co weight ratio: 10%) is selected as the alloy powder, and the particle size is less than 10 μm. The polyvinyl butyral alcohol solution and the alloy powder are mixed evenly according to the volume ratio of about 3:1, and the film coating thickness is 0-0.5mm. The method of spraying treatment is the same as that of Embodiment 1. After texturing, the depth and height of the texturing pits are increased compared with the direct texturing method. The hardness of the coating reaches about HV1000, and the wear resistance of the surface increases by about 15% under dry friction. Due to the effect of alloying, the hardness and friction and wear properties of each part of the textured point are also improved accordingly.

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Abstract

The present invention relates to a composite processing method of laser texturing and micro-alloying of roller surface in the technical field of material processing. The method, more specifically, comprises spraying a film containing alloy micro-powder on the roller surface. The alloy micro-powder containing film can increase the laser energy adsorption ability of the roller basal surface and can melt, through laser heating, into the base material to form a new alloy material. Under the effect of laser beams, the film fuses with the base body and forms textured pits. Compared with the prior laser texturing method, the present invention has the advantages that the roller surface is micro-alloyed simultaneously when laser-textured, deepening the textured pits, increasing the boss height and the border definition, improving the hardness and the wear-resistant performances of the roller surface and prolonging the service life of the roller in the premise of guaranteeing the textured surface roughness..

Description

technical field [0001] The invention relates to a method in the technical field of metal material surface processing, in particular to a composite processing method of laser roughening and microalloying on the surface of a roll. Background technique [0002] Laser texturing is a comprehensive new technology developed in recent years. It uses high-energy, high-frequency pulsed laser to act on the surface of the roll to heat, melt and partially gasify it. The liquid surface in the molten pool formed Under the action of tension and auxiliary gas, part of the molten metal is pushed to the edge of the molten pool. Due to the fast heating and fast cooling characteristics of the laser, this part of the metal solidifies rapidly on the edge of the molten pool, forming a bulge, and at the same time forms a micro pit in the middle of the molten pool. structure. The average power of the acousto-optic Q-switched Nd:YAG laser is low, and the surface roughness is not high when used for te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23K26/00B23K26/354
Inventor 胡德金刘红斌万大平
Owner SHANGHAI JIAO TONG UNIV
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