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Hard wear-resistant corrosion-resistant metal ceramic composite coating and preparation method and application thereof

A corrosion-resistant metal and ceramic composite technology, applied in metal material coating process, coating, fusion spraying and other directions, can solve the problems affecting the coating quality, disadvantageous high temperature resistance, oxidation resistance, corrosion resistance and impact refresh type special functional coating. layer, increase the processing difficulty and manufacturing cost of powder core wire, and achieve the effect of simple and easy preparation method, favorable for fluidity and densification, and moderate thickness

Inactive Publication Date: 2020-11-10
JINAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase in the amount of non-conductive ceramic powder in the core wire material, the processing difficulty and manufacturing cost of the core wire material will be increased, and there will be some original materials that cannot fully melt and react in arc spraying. ceramic particles, thus affecting the coating quality, which is not conducive to the research and development of new special functional coatings with high strength, high temperature resistance, oxidation resistance, corrosion resistance and erosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Use pure titanium tube TA with a diameter of 4 mm and a wall thickness of 0.2 mm 2 , fill its tube with boron carbide B that has been thoroughly mixed and dried by ball milling 4 C powder (3-10μm) and pure titanium powder (30-50μm), B 4 The volume ratio of C powder and pure titanium powder is about 10:1, and the two ends are sealed by a grinding machine, and the internal powder is filled evenly by ultrasonic mechanical vibration. Then use a wire drawing machine to process it through 10 dies to the specified size of 2 mm in diameter. At this time, the inner powder core of the powder core wire is further densified, and the volume content of the powder core accounts for about 64%, that is, the outer sheath TA 2 with inner core (B 4 The volume ratio of C powder and pure titanium powder) is about 36:64.

[0036] Before arc spraying, the powder core wire is subjected to a short-term heat treatment at 600°C / 15min and cooled in air. The Q235 steel plate with a specification...

Embodiment 2

[0039] Choose a pure iron pipe with a diameter of 4mm and a wall thickness of 0.4mm, and fill the pipe with boron carbide TiC, iron boron FeB ceramic powder and a small amount of pure titanium powder and pure chromium powder that have been thoroughly mixed and dried by ball milling, and the ceramic powder The particle size range is 5-15 μm, the metal powder particle size range is 30-50 μm, the volume ratio of TiC to FeB is 1:1, the volume ratio of pure titanium powder and pure chromium powder is 1:1, pure titanium powder, pure chromium powder The sum of the two volume percentages is about 1 / 10 of the sum of the total volume of TiC and FeB powders. The two ends are sealed by argon arc welding, and the internal powder is filled evenly by ultrasonic mechanical vibration. Subsequently, it is processed by a four-die swaging machine to a specified size of 2 mm in diameter through 8 dies. At this time, the inner powder core of the powder core wire is further densified, and the volume ...

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PUM

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Abstract

The invention discloses a hard wear-resistant corrosion-resistant metal ceramic composite coating and a preparation method and application thereof. The coating is prepared from a cored wire obtained by compounding pure metal / ceramic powder through a thermal spraying technology, wherein the cored wire comprises an outer wrapper and an inner core, the outer wrapper is made of pure metal, the inner core is a mixture of ceramic powder and pure metal powder, the pure metal powder accounts for 7-30% of the volume of the inner core, and the volume ratio of the outer wrapper to the inner core is 30:70to 70:30. The pure metal powder in the cored wire plays roles of a plasticizer and a conductive agent. The coating has the characteristics of moderate thickness, compact internal structure, uniform ceramic phase distribution, strong binding force, simple and feasible preparation method, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of metal-ceramic composite coatings, and in particular relates to a hard wear-resistant and anti-corrosion metal-ceramic composite coating and its preparation method and application. Background technique [0002] Since the 1980s, arc spraying, as an advanced and practical technology with the lowest cost and most suitable for large-scale promotion in thermal spraying, has promoted its research and application in the field of metal wear resistance and corrosion resistance. However, the principle of arc spraying technology determines that it can only be sprayed with conductive wire materials, so many materials with high hardness, high wear resistance, poor ductility and non-conductivity are difficult to apply, and the raw materials used for metal wires are difficult to process. ,high cost. With the advent of powder core wire and the successful development of high-speed arc spraying equipment such as supersonic...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/131
CPCC23C4/06C23C4/131
Inventor 于振涛李伦张亚峰余森赵利渊何卫敏汶彬彬牛金龙王云倪园
Owner JINAN UNIVERSITY