Alloy powder for laser cladding of crystallizer copper plate and laser cladding method

A technology of crystallizer copper plate and laser cladding, applied in metal material coating process, coating and other directions, can solve the problem that the coating is prone to fall off, the cladding layer is prone to pores and inclusions, and the fluidity of the molten pool powder is deteriorated, etc. The problem is that the preparation method is simple and practical, easy to mass-produce, and the conditions are easy to control.

Active Publication Date: 2021-10-12
山东天润众成增材制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electroplating and thermal spraying coatings are mainly mechanically bonded to the substrate, so the coating is prone to fall off during use, resulting in a short service life, while the laser cladding layer is metallurgically bonded to the substrate surface. This year, this technology is more and more quickly applied to the crystallizer In the strengthening and repairing of copper plates, but in practical applications, it is found that due to the low melting point of copper, the alloy powder near the melting channel often reacts with the locally melted copper plate on the nearby surface. The surface of the first melted copper plate reacts together, resulting in poor fluidity of the molten pool powder, which in turn leads to defects such as pores and inclusions in the cladding layer, and makes the copper plate of the crystallizer after strengthening and repairing scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The above-mentioned alloy powder is used to carry out laser cladding on the copper plate of the crystallizer to form a cladding layer. Concrete preparation method comprises the following steps:

[0031] (1) Pretreat the surface of the copper plate of the crystallizer, grind the surface of the copper plate, and then use industrial alcohol to clean the surface of the copper plate to remove impurities; in this step, the grinding amount of the copper plate is controlled to 0.5mm.

[0032] (2) Place the crystallizer copper plate in a large water tank. The four corners of the crystallizer are supported by a height-adjustable sealed hydraulic support. Adjust the height of the hydraulic support so that the water level of the water tank is lower than the lowest point on the surface of the crystallizer copper plate. Place the water tank in the laser melting Cover the workbench.

[0033] (3) Spread the laser cladding alloy powder on the surface of the copper substrate to be clad,...

Embodiment 1

[0040] The mass percent of each component of the alloy powder used in this embodiment consists of:

[0041] Mo: 2.1%, Cr: 4.7%, C: 1.6%, Si: 0.15%, W: 10.5%, V: 4.62%, Mn: 3.22%, and the balance is Fe. Each component of the alloy powder is a powder with a purity greater than 99.9%, and a particle size of 135-150 mesh.

[0042] The alloy powder was used to carry out laser cladding on the mold copper plate.

[0043] (1) Pre-treat the surface of the copper plate of the crystallizer, grind the surface of the copper plate, control the grinding amount to 0.5mm, and then use industrial alcohol to clean the surface of the copper plate to remove impurities.

[0044] (2) Place the crystallizer copper plate in the large water tank. The four corners of the crystallizer are supported by a height-adjustable sealed hydraulic support. By adjusting the height of the hydraulic support, the water level of the water tank is lower than the lowest point on the surface of the crystallizer copper pl...

Embodiment 2

[0050] The mass percent of each component of the alloy powder used in this embodiment consists of:

[0051] Mo: 2.4%, Cr: 4.5%, C: 1.5%, Si: 0.12%, W: 11.0%, V: 4.52%, Mn: 3.28%, and the balance is Fe. Each component of the alloy powder is a powder with a purity greater than 99.9%, and a particle size of 180-260 mesh.

[0052] The alloy powder was used to carry out laser cladding on the mold copper plate.

[0053] (1) Pre-treat the surface of the copper plate of the crystallizer, grind the surface of the copper plate, control the grinding amount to 0.5mm, and then use industrial alcohol to clean the surface of the copper plate to remove impurities.

[0054] (2) Place the crystallizer copper plate in the large water tank. The four corners of the crystallizer are supported by a height-adjustable sealed hydraulic support. By adjusting the height of the hydraulic support, the water level of the water tank is lower than the lowest point on the surface of the crystallizer copper pl...

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Abstract

The invention relates to an alloy powder for laser cladding of a crystallizer copper plate and a laser cladding method, belonging to the technical field of material science and surface engineering. The alloy powder is calculated by weight percentage, and the mass composition of the alloy powder is: Mo: 2.1%~2.4%, Cr: 4.5%~4.7%, C: 1.5%~1.6%, Si: 0.12%~0.18%, W: 10.0% ~11.0%, V: 4.52%~4.72%, Mn: 3.22%~3.35%, and the balance is Fe. The preparation method of the present invention can clad the alloy powder on the surface of the copper plate under relatively low temperature conditions, and the thermal conductivity of the copper plate is good, so that the heat of the first alloy powder cladding layer is quickly taken away by the cooling water in the water tank, and the temperature of the cladding layer When it falls down quickly, the nearby copper plate does not melt, does not affect the fluidity of the alloy powder, improves the surface quality of the cladding layer, and the cladding layer has a dense structure and a smooth surface.

Description

technical field [0001] The invention relates to an alloy powder for laser cladding of a crystallizer copper plate and a laser cladding method, belonging to the technical field of material science and surface engineering. Background technique [0002] The crystallizer is a key component in the continuous casting equipment of the steel plant. The quality of the copper plate of the mold directly affects the surface quality of the continuous casting slab, the operation rate of the continuous casting machine and the continuous casting cost. Mold copper plate has problems such as edge wear, wide surface thermal crack, narrow surface shrinkage and corrosion during use. At present, the strengthening of the copper plate of the crystallizer is mainly to use a suitable surface treatment technology to plate one or several materials on the surface of the copper plate to obtain a special functional surface. Under the condition that its thermal conductivity is not greatly affected by the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/22C22C38/02C22C38/24C22C38/38C23C24/10B22F1/00B22D11/059B22D11/057
CPCB22D11/057B22D11/059B22F1/0003C22C38/02C22C38/22C22C38/24C22C38/38C23C24/103
Inventor 付宇明田宁郑丽娟
Owner 山东天润众成增材制造有限公司
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