High temperature anti-oxidation coating for steel-copper solid-liquid bimetal composite casting

An anti-oxidation coating and composite casting technology, which is applied in the direction of fire-proof coatings, metal-free paints, coatings, etc., can solve the problems of inability to protect the metal substrate from oxidation and poor wall-hanging effect, and achieve good wall-hanging effect, Improve adhesion and facilitate the effect of bonding

Active Publication Date: 2019-11-29
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the viscosity of single sodium tetraborate is very small at high temperature, it is easy to flow on the metal substrate, and the wall hanging effect is poor. This method cannot protect the metal substrate from being oxidized at a high temperature of 1000-1200 °C.

Method used

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  • High temperature anti-oxidation coating for steel-copper solid-liquid bimetal composite casting
  • High temperature anti-oxidation coating for steel-copper solid-liquid bimetal composite casting
  • High temperature anti-oxidation coating for steel-copper solid-liquid bimetal composite casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 10g of copper powder with a particle size of 100µm and 20g of anhydrous sodium tetraborate with a particle size of 200µm to the ball mill, ball mill and mix for 30min at a speed of 210r / min, transfer all to the mixer, add 20g of ethylene glycol, and mix at a speed of 300r / min Stir at a rotating speed for 10 minutes, let it stand for defoaming, and prepare a high-temperature anti-oxidation coating.

[0036] At room temperature, spray the prepared coating evenly on the surface of the steel substrate to be compounded, send it into a heating furnace, dry it at 120°C for 15 minutes, take it out and spray again. After repeated spraying for 10 times, the thickness of the final dried coating reaches 1.5mm, which is fully attached to the steel substrate.

[0037] The above-mentioned steel substrate coated with high-temperature anti-oxidation coating is preheated to 1100°C, and a ZCuPb20Sn5 copper alloy melt melted at 1200°C is cast on its surface to prepare a steel-copper bi...

Embodiment 2

[0041] Add 4g of copper powder with a particle size of 100µm and 10g of anhydrous sodium tetraborate with a particle size of 100µm to the ball mill, ball mill and mix for 50min at a speed of 280r / min, transfer all to the mixer, add 10g of ethylene glycol, and mix at a speed of 350r / min Stir at a rotating speed for 10 minutes, let it stand for defoaming, and prepare a high-temperature anti-oxidation coating.

[0042]At room temperature, spray the prepared coating evenly on the surface of the 45 steel substrate to be compounded, send it into the heating furnace, dry it at 120°C for 15 minutes, take it out and spray again. After repeated spraying 10 times, the thickness of the final dried coating reaches 2.0mm, which is fully attached to the steel substrate.

[0043] The above-mentioned steel substrate coated with high-temperature anti-oxidation coating is preheated to 1200°C, and a ZCuPb20Sn5 copper alloy melt melted at 1200°C is cast on its surface to prepare a steel-copper bim...

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Abstract

The invention discloses high-temperature anti-oxidation coating for steel-copper solid-liquid double-metal composite casting. The high-temperature anti-oxidation coating is prepared from 13 to 20 percent of copper powder, 40 to 43 percent of anhydrous sodium tetraborate and 37 to 47 percent of ethylene glycol. The high-temperature anti-oxidation coating disclosed by the invention has a better wetting property and the adhesive quality of the coating is improved; the coating thickness of the coating at high temperature can be remarkably improved and the heat transfer efficiency of the coating isremarkably enhanced; the combination of a double-metal composite material is facilitated. When the high-temperature anti-oxidation coating is pre-heated to high temperature of 1000 to 1200 DEG C, theanhydrous sodium tetraborate is melted and is separated from the copper powder; the copper powder is melted and permeates into a steel matrix to form a protection layer; the sodium tetraborate is crusted on the outer side of a copper layer. The interface bonding strength of the steel-copper double-metal composite material obtained by casting through the method can reach 192MPa at maximum.

Description

technical field [0001] The invention relates to a high-temperature anti-oxidation coating, in particular to a high-temperature anti-oxidation coating suitable for solid-liquid bimetal composite casting. Background technique [0002] Bimetallic composite materials have excellent mechanical properties, and have good thermal conductivity, electrical conductivity, wear resistance and corrosion resistance, and are widely used in many fields such as electric power, machinery, petroleum, chemical industry, energy, and environmental protection. [0003] The solid-liquid composite casting technology of bimetallic materials is a technology that uses casting technology to obtain metallurgical bonding of two or more metal materials on the interface to prepare new materials. The technology is low in cost, simple in process, and easy to be popularized and applied in industry. At the same time, this technology has good interface bonding and stable material properties, and can prepare bime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/38B22D19/16
CPCB22D19/16C09D1/00C09D5/18C09D5/38
Inventor 张国伟康圆圆王明杰邢明徐宏任霁萍
Owner ZHONGBEI UNIV
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