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Fast laser depositing process of preparing antinwear heat resistant composite coating on surface of crystallizer

A crystallizer and thermal compounding technology, applied in the coating process of metal materials, coatings, manufacturing tools, etc., can solve the problems of lack of in-depth research on the formation and behavior of cracks, lack of cladding materials, application limitations, etc., and achieve remarkable results Economic and social benefits, low overall cost, and small machining allowance

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] Although surface treatment methods such as electroplating, thermal spraying, and permeation plating widely used in the prior art can improve the wear resistance of the crystallizer copper plate, because the coating prepared by electroplating and thermal spraying is mechanically combined with the substrate, it reduces to a certain extent. It is difficult to control the diffusion between the metal and the copper lattice of the permeable coating in the application, and the higher cost also limits their application
[0004] In recent years, with the wide application of laser technology, the surface coating of the crystallizer is prepared by laser cladding technology. The problem of this technology is the lack of in-depth research on the formation and behavior of cracks in the laser cladding process; Cladding materials with cladding process characteristics; detection and automatic control of laser cladding process
Among them, the crack problem is particularly serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The process of preparing a wear-resistant and heat-resistant composite coating by laser rapid cladding on the surface of the crystallizer of the present invention includes the following process:

[0033] 1. Surface pretreatment of mold copper plate

[0034] Use 200 g / l of H at room temperature 2 SO 4 The mixed solution of 100g / l HCl is used to pickle the copper plate of the crystallizer to remove rust until it is completely removed; then put the copper plate of the crystallizer in 70-80g / l HCl at room temperature 2 SO 4 Soak in water for 0.5 minutes to activate it;

[0035] 2. Plasma spraying pre-deposited primer alloy

[0036] Before spraying, clean the copper plate with acetone, and then perform sandblasting treatment. When spraying, use hydrogen as the combustion gas and argon as the protective gas. Plasma spraying is carried out under the condition of current 500A, nickel-based self-fluxing alloy powder is used for spraying, and the thickness of the pre-deposit...

Embodiment 2

[0053] The process of preparing a wear-resistant and heat-resistant composite coating by laser rapid cladding on the surface of the crystallizer of the present invention includes the following process:

[0054] 1. Surface pretreatment of mold copper plate

[0055] Use 250 g / l of H at room temperature 2 SO 4 The mixed solution of 110g / l HCl is used to pickle the copper plate of the crystallizer to remove rust until it is completely removed; then put the copper plate of the crystallizer in 70-80g / l HCl at room temperature 2 SO 4Soak for 0.8 minutes to activate it;

[0056] 2. Plasma spraying pre-deposited primer alloy

[0057] Before spraying, clean the copper plate with acetone, and then perform sandblasting treatment. When spraying, use hydrogen as the combustion gas and argon as the protective gas. Plasma spraying is carried out under the condition of current 500A, nickel-based self-fluxing alloy powder is used for spraying, and the thickness of the pre-deposited primer ...

Embodiment 3

[0074] 1. Surface pretreatment of mold copper plate

[0075] Use 250 g / l of H at room temperature 2 SO 4 With the mixed solution of 110g / l HCl, the crystallizer copper plate is acid-washed to remove rust until it is completely removed; then the crystallizer copper plate is placed in 75g / l HCl at room temperature 2 SO 4 Soak for 0.8 minutes to activate it;

[0076] 2. Plasma spraying pre-deposited primer alloy

[0077] Before spraying, clean the copper plate with acetone, and then perform sandblasting treatment. When spraying, use hydrogen as the combustion gas and argon as the protective gas. Plasma spraying is carried out under the condition of current 500A, nickel-based self-fluxing alloy powder is used for spraying, and the thickness of the pre-deposited primer alloy coating is 0.3-0.4mm;

[0078] 3. Rapid cladding of base alloy by high power laser

[0079] Choose DL-HL-T10000 type CO 2 laser. Turn on the SIEMENS CNC machine tool. The best laser mode (low order mod...

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Abstract

The fast laser depositing process of preparing antiwear heat resistant composite coating on the surface of crystallizer features that high power laser is first utilized in fast scanning to form transition layer in excellent metallurgical binding with the substrate of crystallizer copper plate on the surface of the plate and then utilized in wide band deposition to form Co base alloy with excellent heat resistance and high wear resistance on the surface of the transition layer. Compared with convenient technological process, the present invention has the advantages of precise control in laser power, position, shape and other parameters, easy automatic control of the whole process, no environmental pollution, high production efficiency, low power consumption, etc. and may be used widely.

Description

technical field [0001] The invention belongs to the technical field of laser rapid cladding, in particular to a method for preparing and repairing a wear-resistant and heat-resistant coating on the surface of a crystallizer. Background technique [0002] The crystallizer is a water-cooled steel ingot mold, which is a very important part of the continuous casting machine, called the "heart" of the continuous casting equipment. The main forms of mold copper plate damage are thermal cracks, wear and corrosion, and local damage to the surface often causes the failure of the entire part and eventually leads to equipment scrapping; and the resources of copper and copper alloys are in short supply, and prices have been rising in recent years. Trend; According to statistics, the price of a set of crystallizers is 70,000 to 120,000 yuan, and the annual consumption of copper crystallizers in metallurgical enterprises in my country is more than 2 billion yuan. Therefore, improving the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23C24/10C23C30/00B23K9/04C23C4/06C22F1/10C23C4/134
Inventor 陶兴启黄旭东刘芳刘常升
Owner SHENYANG DALU LASER COMPLETE EQUIP
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