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A laser direct deposition preparation method and device for the working layer of a metallurgical hot roll

A technology of working layer and hot roll, which is applied in the application field of laser technology to achieve the effect of good application prospect, prolonging service life and reducing scattering

Inactive Publication Date: 2011-12-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the research results of the application of laser-assisted direct metal deposition technology to prepare the working layer of hot rolling rolls

Method used

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  • A laser direct deposition preparation method and device for the working layer of a metallurgical hot roll
  • A laser direct deposition preparation method and device for the working layer of a metallurgical hot roll
  • A laser direct deposition preparation method and device for the working layer of a metallurgical hot roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: High-speed steel-like powder

[0043] Use gasoline, alcohol, etc. to remove oil and decontamination solvents to remove oil and rust on the surface of the roller core, and then use sandpaper to polish the surface of the roller core to further remove dirt and facilitate the deposition of the deposition layer; then put the mechanically mixed powder to be deposited into the powder feeding system, adjust the shielding gas, powder feeding gas flow rate and powder flow control system to obtain the required powder flow; open the CO 2 Laser for powder deposition on the surface of the roll core. Such as image 3 As shown, first deposit along the axial direction of the roll (X direction), and then pass A N and previous pass A N-1 Carry out overlapping, after depositing the entire roll side, start depositing along the roll circumference direction at the end point, the subsequent pass B N with previous pass B N-1 Carry out the overlap of the same overlap rate in the ...

Embodiment 2

[0045] Example 2: Co-based alloy composite powder

[0046] Use gasoline, alcohol, etc. to remove oil and decontamination solvents to remove oil and rust on the surface of the roller core, and then use sandpaper to polish the surface of the roller core to further remove dirt and facilitate the deposition of the deposition layer; then put the mechanically mixed powder to be deposited into the powder feeding system, adjust the shielding gas, powder feeding gas flow rate and powder flow control system to obtain the required powder flow; open the CO 2 Laser for powder deposition on the surface of the roll core. Such as image 3 As shown, first deposit along the axial direction of the roll (X direction), and then pass A N and previous pass A N-1 Carry out overlapping, after depositing the entire roll side, start depositing along the roll circumference direction at the end point, the subsequent pass B N with previous pass B N-1 Carry out the overlap of the same overlap rate in t...

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Abstract

A laser-assisted direct metal deposition manufacturing method and device for a metallurgical hot roll working layer material, belonging to the application field of laser technology, is characterized in that: high-speed steel-like powder and Co-based alloy composite powder are used as the roll working layer material, specifically: High-speed steel-like powder or the mechanically mixed Co-based alloy as the base material and the powder with different contents of reinforcement and toughening fine particles are put into the powder feeding system, and the laser is started on the surface of the roller core whose stroke is controlled by the workbench. Auxiliary simultaneous powder-feeding direct metal deposition manufacturing roll working layer. The deposition method adopts a staggered deposition method. Deposit the corresponding thickness according to the thickness of the working layer. The content of the hard phase in the powder of the Co-based alloy added with the hard phase is increased layer by layer to obtain a gradient deposition layer. The invention utilizes laser-assisted metal direct deposition technology to prepare a toughened and highly wear-resistant working layer on the surface of the cheap hot roll core material under specific process conditions.

Description

technical field [0001] The invention belongs to the application field of laser technology, and in particular relates to a method and a device for manufacturing a metallurgical hot roll working layer material by laser direct metal deposition. Background technique [0002] In order to meet the requirements for the performance of hot rolls, the upgrading of hot roll materials and the progress of manufacturing technology are important ways to improve their wear resistance and prolong their service life. The development of hot roll material has experienced a qualitative leap from chilled cast iron to high Cr cast iron, from semi-high-speed steel, high-speed steel to hard alloy. The manufacturing technology of hot rolls has also developed from the traditional forging method to the composite casting method. Centrifugal composite casting, continuous casting outer layer forming method, spray deposition method, hot isostatic pressing, electroslag remelting, surface surfacing and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
Inventor 孙桂芳张永康钱晓明刘常升鲁金忠李鹏
Owner JIANGSU UNIV
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