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Technology for preparing metal surface coating through compounding multiple processes

It is a technology of compound process and metal surface, which is applied in the field of metal surface processing, which can solve the problems of wire material difficulty, affect the scope of use and work efficiency, etc., and achieve the effect of wide application range, enhanced bonding force and compact volume

Inactive Publication Date: 2011-02-02
黄锦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is difficult to arrange thin plates and wires on the surface of some heterosexual parts, it greatly affects its scope of use and work efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: A 20G steel pipe with a diameter of φ100×100×5mm is sandblasted to remove impurities and oxide scales on the surface. The cleanliness reaches Sa3 level and the roughness reaches 50um. Use TLAS-400C high-performance supersonic arc spraying equipment to spray JH-7Cr13 powder core wire to prepare an arc spray coating with a thickness of 0.7mm; use R-700 laser welding machine to perform full coating remelting on part of the coating, Laser irradiation speed Φ3mm×(0-12)HZ / S. The prepared coating is then brushed with rare earth antioxidant, and the rare earth antioxidant is 2-4wt% CeO 2 , the mixture of 5-10wt% Ni, 40-45wt% FeAl powder, 41-53wt% water glass, the particle size of the solid matter is 30-80um. Naturally cured for 12 hours, then baked in an oven at 120°C for 2 hours.

[0027] The main properties of the resulting coating: bonding strength 376N / mm 2 , the porosity is 0.01%, the coating hardness is 553HV0.1, the coating hardness HRC>52, and the wear res...

Embodiment 2

[0028] Example 2: The 20G steel pipe of φ100×100×5mm is subjected to sandblasting treatment to remove impurities and oxide skin on the surface, the cleanliness reaches Sa 3 level, and the roughness reaches 50um. The TLAS-400C high-performance supersonic arc spraying equipment was used to spray JH-SAM powder core wire to prepare an arc spray coating with a thickness of 0.7mm. Use R-700 laser welding machine to remelt part of the coating, and the laser irradiation speed is Φ3mm×(0-12)HZ / S. Then paint the sealing agent, the sealing agent is a mixture of 40-50wt% phenolic resin and 50-60wt% aluminum powder, with a thickness of 0.2mm. Naturally cured for 12 hours, then baked in an oven at 120°C for 2 hours.

[0029] The main properties of the obtained coating: bonding strength 305N / mm 2 , the porosity is 0.03%, the coating hardness is 1430HV0.1, the coating hardness HRC>63, and the wear resistance is 30 times that of 20G.

Embodiment 3

[0030] Example 3: The 20G steel pipe of φ100×100×5mm is subjected to sandblasting treatment to remove impurities and oxide scales on the surface, the cleanliness reaches Sa 3 level, and the roughness reaches 50um. TLAS-400C high-performance supersonic arc spraying equipment was used to spray JH-7Cr 13 powder core wire to prepare an arc spray coating with a thickness of 0.7mm. Use the R-700 laser welding machine to partially remelt the coating. The laser irradiation speed is Φ3mm×(0-12)HZ / S, the irradiation width is 3mm, and the distance between irradiation strips is 20mm. Then brush the rare earth antioxidant, the rare earth antioxidant is 2 ~ 4wt% CeO 2 , the mixture of 5-10wt% Ni, 40-45wt% FeAl powder, 41-53wt% water glass, the particle size of the solid matter is 30-80um. Naturally cured for 12 hours, then baked in an oven at 120°C for 2 hours.

[0031] The main properties of the obtained coating: bonding strength 156N / mm 2 , the porosity is 0.02%, the coating hardness i...

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Abstract

The invention relates to a technology for preparing a metal surface coating through compounding multiple processes, which is characterized by preparing a coating on the surface of a metal substrate by simultaneously using three coating preparation processes of thermal spraying, cold spraying and laser remelting. The technology comprises the following steps of: (1) pretreating the surface of the metal substrate; (2) spraying by using electric arcs; (3) remelting by using a laser; and (4) spraying coldly. By simultaneously utilizing the three coating preparation processes, combining the advantages of the three processes and overcoming the defects of the three processes, the technology can be used for preparing the high-performance coating with the functions of abrasion resistance, corrosion resistance, heat resistance, high-temperature oxidation resistance and fatigue spalling resistance in low cost and high efficiency.

Description

Technical field: [0001] The invention relates to the technical field of metal surface processing, in particular to a multi-process composite preparation technology for metal surface coatings. technical background: [0002] In metallurgy, electric power, petrochemical, mining, building materials and other industries, a large number of wear-resistant, anti-corrosion, temperature-resistant, and anti-oxidation treatments are carried out on the surface of some parts in the thermal equipment for conveying materials, ash discharge, flue, and dust removal. [0003] The coating prepared by cold spraying or brushing can play a certain protective role, but it is gradually replaced by new processes because of its low strength, easy to fall off, and short service life. [0004] At present, the more advanced methods of these treatments are thermal spraying and laser remelting to prepare coatings, and thermal spraying methods include arc spraying, plasma spraying, and flame spraying. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00
Inventor 黄锦
Owner 黄锦
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