Laser nanometer cermet alloying process for surface of metallurgic hot roller

A technology of nano-ceramic alloy and hot roll, which is applied in the direction of roll, metal rolling, metal rolling, etc. It can solve the problems that the effect is not obvious, the resistance to high temperature wear and cracking of the roll surface cannot be effectively improved, and the service life is reduced.

Inactive Publication Date: 2007-03-21
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the harsh working conditions and materials of the hot roll, conventional surface strengthening techniques such as flame quenching, high-frequency quenching, plasma spraying and spray welding, arc surfacing, etc. cannot effectively improve the resistance of the roll surface to high tempe...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First, the roll to be strengthened or repaired is machined to remove the surface fatigue layer to obtain the required size and shape. The side to be irradiated by the laser is then ground, degreased and properly cleaned. Then apply the mixed paint evenly on the surface of the roller, the pre-coating thickness is 0.02mm, and air dry. Turn on the SIEMENS CNC machine tool and use the DL-HL-T10000 CO 2 The laser scans the coated roll according to the optimized process parameters. The specific process parameters are: laser power P=1500W, scanning speed V=1.8m / min, overlapping rate 20%, spot diameter D=0.8mm.

Embodiment 2

[0017] First, the roll to be strengthened or repaired is machined to remove the surface fatigue layer to obtain the required size and shape. The side to be irradiated by the laser is then ground, degreased and properly cleaned. Then apply the mixed paint evenly on the surface of the roller, the pre-coating thickness is 0.03mm, and air dry. Turn on the SIEMENS CNC machine tool and use the DL-HL-T10000 CO 2 The laser scans the coated roll according to the optimized process parameters. The specific process parameters are: laser power P=2500W, scanning speed V=3.0m / min, overlapping rate 25%, spot diameter D=2mm.

Embodiment 3

[0019] First, the roll to be strengthened or repaired is machined to remove the surface fatigue layer to obtain the required size and shape. The side to be irradiated by the laser is then ground, degreased and properly cleaned. Then apply the uniformly mixed paint evenly on the surface of the roll, the pre-coating thickness is 0.04mm, and air dry. Turn on the SIEMENS CNC machine tool and use the DL-HL-T10000 CO 2 The laser scans the coated roll according to the optimized process parameters. The specific process parameters are: laser power P=8000W, scanning speed V=15m / min, overlapping rate 30%, spot diameter D=4mm.

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PUM

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Abstract

The laser nanometer cermet alloying process for surface of metallurgical hot roller includes the following steps: 1. machining the roller to eliminate surface fatigue layer to obtain required size and shape, grinding the surface to be laser treated, eliminate dirt and cleaning properly; 2. mixing phenolic resin adhesive and nanometer carbide ceramic paint homogeneously and coating the mixture to the surface of the roller in the thickness of 0.01-0.05 mm before air drying; and 3. scanning the nanometer ceramic coating on the surface of the roller fast with high power CO2 laser in the technological parameters of laser power 1,000-10,000 W, scanning speed of 1.5-20 m/min, lapping rate of 15-35 % and light spot diameter of 0.6-5 mm. The present invention has optimized technological parameters, and can result in solid solution reinforcing and dispersion reinforcing effect, raise the heat stability of the alloy layer, and raise the strength, plasticity and toughness of the alloy layer.

Description

(1) Technical field [0001] The invention relates to a metallurgical hot roll surface strengthening and repair process, in particular to a metallurgical hot roll surface laser nano-ceramic alloying process. (2) Background technology [0002] The roll is a tool for plastically deforming (rolled material) metal, and is an important large-scale consumable part that determines the efficiency of the rolling mill and the quality of the rolled material. The quality and service life of rolls are directly related to the production efficiency, product quality and production cost of rolling production. The supply of roll materials in our country is insufficient and the price is high. Once the surface of the roll wears out and fails, the entire roll will be scrapped (the layer of the roll only accounts for about 10% of the total weight of the roll), which will cause a huge waste of materials. How to repair failed rolls has always been a major problem faced by the roll manufacturing indu...

Claims

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Application Information

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IPC IPC(8): C23C24/10B23K26/34C23D5/02C23D1/00B21B27/02C04B35/56
Inventor 陶兴启黄旭东刘常升陈海涛孙桂芳董容刚
Owner SHENYANG DALU LASER COMPLETE EQUIP
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