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Boride ceramic coating prepared through electric spark deposition in-situ reaction and preparation method thereof

A technology of electric spark deposition and in-situ reaction, applied in coating, metal material coating process, melt spraying and other directions, can solve the problems of continuous casting mold copper surface strengthening and other problems, achieve significant economic and social benefits, organizational The effect of dense, excellent corrosion resistance

Inactive Publication Date: 2013-01-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: aiming at the shortcomings existing in the existing electroplating, thermal spraying and other continuous casting crystallizer copper material surface strengthening processes, a kind of electric spark deposition in-situ reaction boride ceramic coating and its preparation process are proposed to come. Solving the Surface Strengthening Problem of Copper Material in Continuous Casting Mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the preparation of the boride ceramic coating that thickness is 0.1mm

[0020] (1) Substrate pretreatment

[0021] Carry out degreasing and derusting pretreatment on the working surface of the processed copper substrate of the continuous casting crystallizer to obtain a bright and smooth surface;

[0022] (2) EDM deposition

[0023] The boron donor (BC 4 ), infiltration agent (KBF), filler (SiC, Cu) composite material is the deposition electrode, and the mass percentage of the three in the composite material is 10% boron donor, 10% infiltration agent, and the balance filler (5% Cu in the filler , the balance is SiC) as the raw material and sintered at 750~1000°C; the deposition area is protected by side blowing 12~18L / min argon gas, the deposition electrode is fixed in the working gun of the EDM deposition equipment, and the substrate is fixed At the cathode of the EDM deposition equipment, set the power of the EDM deposition equipment to 0.5KW, the vol...

Embodiment 2

[0024] Embodiment 2 thickness is the preparation of the boride ceramic coating of 0.2mm

[0025] (1) Substrate pretreatment

[0026] Carry out degreasing and derusting pretreatment on the working surface of the processed copper substrate of the continuous casting crystallizer to obtain a bright and smooth surface;

[0027] (2) EDM deposition

[0028] The boron donor (BC 4 ), infiltration agent (KBF), filler (SiC, Cu) composite material is the deposition electrode, and the mass percentage of the three in the composite material is 10% boron donor agent, 10% infiltration agent, and the balance filler (10% Cu in the filler , the balance is SiC) as the raw material and sintered at 750~1000℃; the deposition area is protected by side blowing 12~18L / min argon gas, the deposition electrode is fixed in the working gun of the EDM equipment, and the substrate is fixed At the cathode of the EDM deposition equipment, set the power of the EDM deposition equipment to 1KW, the voltage to 60...

Embodiment 3

[0029]Embodiment 3 thickness is the preparation of the boride ceramic coating of 0.4mm

[0030] (1) Substrate pretreatment

[0031] Carry out degreasing and derusting pretreatment on the working surface of the processed copper substrate of the continuous casting crystallizer to obtain a bright and smooth surface;

[0032] (2) EDM deposition

[0033] The boron donor (BC 4 ), osmotic agent (KBF) and filler (SiC, Cu) composite material is the deposition electrode, and the mass percentage of the three in the composite material is 10% boron donor, 10% osmotic agent, and the balance filler (10% Cu in the filler , the balance is SiC) as the raw material and sintered at 750~1000°C; the deposition area is protected by side blowing 12~18L / min argon gas, the deposition electrode is fixed in the working gun of the EDM deposition equipment, and the substrate is fixed At the cathode of the EDM deposition equipment, set the power of the EDM deposition equipment to 3KW, the voltage to 100V...

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Abstract

The invention relates to a boride ceramic coating in situ synthesized on the surface of a continuous casting crystallizer through electric spark deposition and a preparation method thereof. The coating is prepared through the following steps: pretreating a substrate; then with a composite material of a boron-supplying agent, an energizing agent and a filling material used as a deposition electrode, fixing the deposition electrode in a working gun of electric spark deposition equipment under the protection of argon; fixing the substrate at the cathode of the electric spark deposition equipment; starting the electric spark deposition equipment; and moving the electric spark working gun to a copper working surface of the continuous casting crystallizer for deposition of a protective coating. The coating has a compact structure, no pores and no cracks and is in metallurgical bonding with the substrate; the microhardness of the coating is about HV700; the service life of the continuous casting crystallizer is increased by more than 1 to 2 times; the preparation method provided by the invention replaces conventional surface strengthening processes for a continuous casting crystallizer like composite electroplating and thermal spraying having the disadvantages of high energy consumption, high pollution and high cost and has substantial economic and social benefits.

Description

technical field [0001] The invention relates to an electric spark deposition in-situ reaction technology, in particular to an electric spark deposition in-situ reaction boride ceramic coating and a preparation method thereof. Background technique [0002] In steelmaking production, continuous casting has the characteristics of high efficiency and energy saving. By 2004, the continuous casting ratio in my country had reached 96%. The continuous casting mold is the heart of the continuous casting machine, and its technical performance will directly affect the surface quality of the billet, casting speed of the continuous casting machine, continuous casting operation rate and other indicators. The development of high-efficiency continuous casting technology has put forward higher requirements for the quality of continuous casting molds, whether it has high thermal conductivity and high deformation resistance, high strength and high surface accuracy, high hardness and high wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/12B22D11/057C23C26/02
Inventor 潘太军冯宗建张保李杰汪涛
Owner CHANGZHOU UNIV
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