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Metal-based material for preparation of crystallizer or tuyere as well as preparation method of metal-based material

A metal-based and crystallizer technology, applied in the coating process of metal materials, coatings, etc., can solve the problems of reducing the dilution rate of the substrate, high-temperature wear resistance, reducing substrate deformation, and reducing processing costs.

Active Publication Date: 2019-08-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a metal-based material for preparing a crystallizer or a tuyere and a preparation method thereof, aiming at efficiently preparing a copper or copper alloy substrate without cracks, having a wide range of thickness regulation, small deformation of the substrate, and high bonding strength ( Metallurgically bonded with the substrate) high wear-resistant coating, to achieve metallurgical bonding between the coating and the substrate, greatly reduce the dilution rate of the substrate, improve the high temperature wear resistance of the coating, and reduce the deformation of the substrate , the yield rate is high, and the processing cost can be greatly reduced

Method used

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  • Metal-based material for preparation of crystallizer or tuyere as well as preparation method of metal-based material
  • Metal-based material for preparation of crystallizer or tuyere as well as preparation method of metal-based material
  • Metal-based material for preparation of crystallizer or tuyere as well as preparation method of metal-based material

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Embodiment 1

[0033]A metal-based material for preparing crystallizers or tuyeres provided by Embodiment 1 of the present invention includes a copper or copper alloy substrate, a transition layer coated on the surface of the copper or copper alloy substrate, and a high wear-resistant material bonded on the transition layer. The working layer, wherein the material of the transition layer is at least one of pure Co metal, pure Ni metal, pure Cr metal, pure Cu metal, pure Mo metal, pure Ag metal, NiCr or MCrAlY alloy, and M represents Ni, Co or NiCo, the material of the high wear-resistant working layer is at least one of iron-based alloys, nickel-based alloys, cobalt-based alloys, copper-based alloys or cermets, wherein the copper-based alloys include CuMo alloys, copper + chromium carbide, cermets Adding at least one of tungsten carbide, chromium carbide, titanium carbide, tantalum carbide, aluminum oxide, chromium oxide, and titanium oxide ceramics to at least one of iron-based alloys, nicke...

Embodiment 2

[0038] Embodiment 2 of the present invention provides a method for preparing a metal-based material for preparing a crystallizer or a tuyere, the method comprising:

[0039] Step 1: Pretreat and preheat the surface of the copper or copper alloy substrate. The pretreatment at least includes degreasing and sandblasting the surface of the copper or copper alloy substrate. The preheating temperature is 20°C to 400°C. The time is 30 minutes to 120 minutes;

[0040] Step 2: Prepare a transition layer on the surface of the copper or copper alloy substrate by metallurgical bonding. The material of the transition layer is pure Co metal, pure Ni metal, pure Cr metal, pure Cu metal, pure Mo metal, pure Ag metal, NiCr Or at least one of MCrAlY alloys, M represents Ni, Co or NiCo;

[0041] Specifically, a transition layer is prepared on the surface of the copper or copper alloy substrate by laser spraying, the specific parameters of laser spraying are: laser power 1-10kW, laser head scann...

Embodiment 3

[0048] Embodiment 3 of the present invention provides a specific method for preparing metal-based materials for crystallizers or tuyere, the method is as follows:

[0049] Materials used: the powder is Co and Ni45A, the substrate is 10mm thick chrome-zirconium copper plate

[0050] Equipment used: Raycus 4kW semiconductor fiber coupled laser (RFL-A4000D), fiber core diameter is 100μm, circular spot diameter is 0.5-5mm, focal length is 200mm, 6-axis robot system, 5mm coaxial powder feeding head

[0051] The preparation method of wear-resistant coating (high wear-resistant working layer) on 10mm thick chrome-zirconium copper plate comprises the following steps:

[0052] 1) Degreasing and sandblasting the surface of the chrome-zirconium copper plate to increase the absorption rate of the laser;

[0053] 2) Dry the Co and Ni45A powders at 120°C for 1 hour for use;

[0054] 3) Preheat the chrome-zirconium copper plate at 300°C for 30 minutes;

[0055] 4) The transition layer was...

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Abstract

The invention discloses a metal-based material for the preparation of a crystallizer or a tuyere and belongs to the technical field of surface engineering. According to the metal-based material, a transition layer is innovatively arranged between a Cu or Cu alloy matrix and a high-abrasion-resistance working layer by the adoption of a metallurgical bonding method, and made of at least one of pureCo metal, pure Ni metal, pure Cr metal, pure Cu metal, pure Mo metal, pure Ag metal and a NiCr or MCrAlY alloy; through the transition layer, the functions of improving the laser absorption rate, lowering the matrix heat conductivity, and lowering the dilution rate can be achieved; due to the existence of the transition layer, the thickness of the working layer can be adjusted within a range of 0.01-3 mm and the formation of surface cracks can be avoided; furthermore, the ratio of the thickness of the transition layer to that of the high-abrasion-resistance working layer is 1:(1-3), so that the perfect bonding of the transition layer and the high-abrasion-resistance working layer can be guaranteed within the ratio range; the formation of a high-abrasion-resistance coating or coating product which is free of surface cracks and subjected to metallurgical bonding on the Cu or Cu alloy matrix can be improved; the reliability of the crystallizer or the tuyere can be improved; and the service life of the crystallizer or the tuyere can be prolonged.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on April 23, 2019, the application number is 201910326209.X, and the title of the invention is "a method for preparing a wear-resistant coating on copper metal and copper alloy substrates" , the entire contents of which are incorporated in this application by reference. technical field [0002] The invention relates to the technical field of surface engineering, in particular to a metal-based material for preparing crystallizers or tuyeres and a preparation method thereof. Background technique [0003] At present, in order to improve the high-temperature wear resistance of chromium-zirconium copper for crystallizers in the metallurgical iron and steel industry, electroplating nickel layer is generally used as a primer, and then supersonic flame spraying is used to spray cermet coating; or thermal spraying nickel-based alloy plus tungsten carbide (WC) is used. , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 王豫跃牛强齐振佳杨冠军李长久
Owner XI AN JIAOTONG UNIV
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