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Gradient functional material for wear situation of high temperature and high speed abrasive particles in hot continuous rolling production line

A gradient functional material and abrasive wear technology, which is applied in the coating process of metal materials, coatings, etc., to achieve the effects of reducing the friction coefficient, good self-lubricating performance, and improving self-lubricating performance

Inactive Publication Date: 2019-06-11
沈阳大陆激光工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no corresponding material in the field of laser cladding for this material at present, after special research and development, discussion and development, and through the analysis of the wear mechanism system of the guide liner, a laser cladding that is resistant to high temperature and high speed abrasive wear has been developed. Gradient Functional Materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] During the hot-rolling production process of a steel factory in Nanjing, product quality problems were caused by excessive high-temperature wear within an average of 20 hours. The coiling of the steel plate could no longer be achieved, and manual operation and driving were required for replacement.

[0016] After using the patented application method for laser cladding manufacturing, the laser cladding parameters are: power: 1200W, spot diameter: 1.8mm, scanning speed: 25mm / s, powder placement thickness: 0.5mm. The powder with a particle size of 150 mesh is used for cladding, and the composition is: Cr: 13%;: Co: 5%; Si: 0.1%; CBN: 5%; Nb: 0.1%; W: 2%; Ni: the balance.

[0017] After proper cladding process design, the size and precision required by the original design will be restored. The upper machine is in service under actual working conditions, and it can still be used online after 130 hours of use (the original use is 20 hours). That is to say, it proves that th...

Embodiment 2

[0019] During the hot rolling operation of a steel factory in Hebei, the use time of the equipment parts in contact with the strip steel is only 8 hours, and the wear depth of the edge part in contact with the strip steel is more than 6mm, which seriously affects the working efficiency of the production line.

[0020] Use this material for laser cladding. The laser cladding parameters are "power: 1500W, spot diameter: 1.8mm, scanning speed: 30mm / s, powder thickness: 0.5mm." The powder with a particle size of 150 mesh is used for cladding, and the composition is: Cr: 16%; Co: 7%; Si: 0.3%; CBN: 6.5%; Nb: 0.2%; W: 5%;

[0021] After proper laser cladding design, the original size and precision are restored to meet the design requirements. Assembled on the hot rolling line for on-line test, the test result has reached 50 hours from the original 8 hours, and the service life has increased to more than 6 times, far exceeding the design index.

Embodiment 3

[0023] During hot continuous rolling in a steel mill, the edges in contact with the strip were severely worn, which seriously affected the work efficiency of the production line.

[0024] Use this material for laser cladding. The laser cladding parameters are "power: 1500W, spot diameter: 1.8mm, scanning speed: 30mm / s, powder thickness: 0.5mm." The powder with a particle size of 150 mesh is used for cladding, and the composition is: Cr: 19%; Co: 10%; Si: 0.5%; CBN: 8%; Nb: 0.3%; W: 7%;

[0025] After proper laser cladding design, the original size and precision are restored to meet the design requirements. Assembled on the hot rolling line for on-line testing, the service life is increased to more than 6 times, far exceeding the design index.

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Abstract

The invention discloses a gradient functional material for the wear situation of high temperature and high speed abrasive particles in a hot continuous rolling production line. The material is prepared from the following components in percentage by mass: 13-19% of Cr; 5-10% of Co; 0.1-0.5% of Si; 5-8% of CBN; 0.1-0.3% of Nb; 2-7% of W; and the balance of Ni. A gradient functional coating preparedthrough the gradient functional material has good strength, hardness, wear resistance, oxidation resistance and self-lubrication performance, and the service life of products coated with the materialcan be prolonged to six times or above.

Description

technical field [0001] The present invention relates to a gradient functional material, in particular to a gradient functional material used in abrasive wear generated during high-speed scratching in a high-temperature environment. Background technique [0002] In recent years, with the increasingly intensified competition in the hot rolling industry, the market has put forward higher requirements for product quality. However, some special working conditions on some production lines are very harsh. Under such special working conditions, the result of contact between the equipment components on the production line and the strip steel will have a great impact on the quality of the steel plate. For example, when working at a high temperature of 650-720°C (the temperature will be higher considering the friction work heating factor), at this time, the strip passing speed is as high as 18m / s, and wear will inevitably occur in such a high-temperature, high-speed environment. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
Inventor 张冬雪董思远陈海涛
Owner 沈阳大陆激光工程技术有限公司
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