Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface

A continuous casting crystallizer and copper alloy plate technology, which is applied in the field of high-temperature wear-resistant coatings, can solve the problems of complex process flow and high cost, and achieve the effects of simple process operation, low cost and excellent thermal shock resistance

Inactive Publication Date: 2013-01-02
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method for preparing a high-temperature wear-resistant coating on the surface of a copper alloy plate in a continuous casting crystallizer. Grinding performance, greatly prolonging the service life of the mold copper plate, simplifying the process and reducing the production cost

Method used

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  • Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface
  • Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface
  • Method for preparing high-temperature wear-resistant coating on continuous casting crystallizer copper alloy plate surface

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Embodiment 1

[0031] Plasma spraying Cr on the surface of CuCrZr alloy commonly used in crystallizer 3 C 2 -20NiCr cermet (Cr 3 C 2 -80%wt, NiCr-20%wt). Spray distance 90mm, main air flow 54L min -1 , powder feeding rate 15g·min -1 , power 22kw, coating thickness about 0.5mm. The microscopic morphology of the coating section is shown in figure 1 , the bonding strength and thermal fatigue life of the coating are shown in Table 1.

Embodiment 2

[0033]Plasma spraying Cr on the surface of CuCrZr alloy commonly used in crystallizer 3 C 2 -25NiCr cermet (Cr 3 C 2 -75%wt, NiCr-25%wt). Spray distance 140mm, main air flow 64L min -1 , powder feeding rate 30g·min -1 , power 30kw, coating thickness about 0.5mm. The microscopic morphology of the coating section is shown in figure 2 , the bonding strength and thermal fatigue life of the coating are shown in Table 1.

Embodiment 3

[0035] Plasma spraying Cr on the surface of CuCrZr alloy commonly used in crystallizer 3 C 2 -30NiCr cermet (Cr 3 C 2 -70%wt, NiCr-30%wt). Spray distance 130mm, main air flow 64L min -1 , powder feeding rate 25g·min -1 , power 22kw, coating thickness about 0.5mm. The microscopic morphology of the coating section is shown in image 3 , the bonding strength and thermal fatigue life of the coating are shown in Table 1.

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Abstract

The invention discloses a method for preparing a high-temperature wear-resistant coating on a continuous casting crystallizer copper alloy plate surface, which comprises the following step: spraying metal ceramic powder on a pretreated copper alloy plate surface by a plasma spraying process to form a metal ceramic coating of which the thickness is 0.5mm, wherein the metal ceramic powder is Cr3C2-NiCr powder of which the particle size is 325-500 meshes; the Cr3C2-NiCr powder comprises 70-80 wt% of Cr3C2 and the balance of NiCr alloy powder; and the Ni / Cr mass ratio in the NiCr alloy powder is 80:20. The coating prepared by the method disclosed by the invention has the advantages of high bonding strength, favorable thermal shock resistance and long thermal-fatigue life, can satisfy the working requirements for crystallizer copper alloy plates, and obviously prolongs the service life of the crystallizer copper alloy plate.

Description

technical field [0001] The invention relates to a method for plasma spraying a high-temperature wear-resistant coating on the surface of a copper alloy plate, in particular to a method for preparing a high-temperature wear-resistant coating on the surface of a copper alloy plate of a continuous casting crystallizer. Background technique [0002] Continuous casting has the characteristics of high efficiency and energy saving, and is a conventional production technology in the modern iron and steel industry. The crystallizer is the core of the continuous casting machine. It is a device that injects molten steel into it to form a continuous hard shell on the outer layer of the molten steel, and then pulls it into the fan-shaped section supporting the guide section to cool and solidify, and pulls out the billet. Its technical performance It will directly affect the service life, production efficiency and billet quality of continuous casting equipment. [0003] In continuous cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10B22D11/059C23C4/06C23C4/134
Inventor 陈健刘雪飘梁欢崔庭方锴
Owner JIANGSU UNIV OF SCI & TECH
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