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Ceramic lining composite copper tube production method

A technology of ceramic lining and manufacturing method, which is applied in the field of ceramic lining composite copper pipe manufacturing, can solve the problems that the tube billet crystallizer cannot be processed, the electroplating production pollutes the environment, and the thickness of the chrome plating layer is thin, so as to achieve environmental protection, High production efficiency and low power consumption

Inactive Publication Date: 2003-12-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1075512 and CN1101686 respectively reported Ni-Fe alloy electroplating method on the copper plate surface of crystallizer, coating hardness is less than 500Hv, wear resistance is low
Chromium plating on the surface of the crystallizer can obtain a coating of more than 900Hv, but the thickness of the chrome plating is thin, usually less than 0.2mm, and the stress is large, and it is easy to crack and peel off during use
In addition, electroplating production also pollutes the environment
The supersonic spraying technology is applied to the surface treatment of the crystallizer, which can obtain a high-hardness coating and has a good effect, but the supersonic spraying technology is only suitable for the slab mold, and cannot be used for the tube mold

Method used

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  • Ceramic lining composite copper tube production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The thermite 3 is placed in a copper tube 2 with an inner diameter of 150 mm and a length of 1000 mm. In the thermite, CuO powder 120 mesh, aluminum powder 150 mesh, CuO and Al are proportioned at 60% and 30% respectively, and 2.5% of the total material is added with SiO 2 、CrO which accounts for 2% of the total material 3 、Na which accounts for 2.5% of the total material 2 B 4 O 7 、ZrO which accounts for 3% of the total material 2 , After mixing, put it into the copper tube, the copper tube with the material is clamped on the centrifuge 1, and after the centrifuge rotation reaches 1220 rpm, the material is ignited, and Al and CuO react in formula (1). Combustion reaction product Al 2 O 3 It stratifies with Cu under the action of centrifugal force, the combustion reaction lasts for 12 seconds, and stops after 15 minutes to obtain Al-containing 2 O 3 The performance of the ceramic-lined composite copper tube of ceramic 5 and transition layer Cu4 is shown in Table 2. Example ...

Embodiment 2

[0053] The thermite 3 is placed in a copper tube 2 with an inner diameter of 120 mm and a length of 800 mm. In the thermite, CuO powder 150 meshes, aluminum powder 150 meshes, CuO and Al are proportioned at 52% and 32.5% respectively, and 4% of the total material is added with SiO 2 , CrO accounted for 4% of the total material 3 、Na which accounts for 2.5% of the total material 2 B 4 O 7 、ZrO which accounts for 5% of the total material 2 , After mixing, put it into the copper tube, the copper tube containing the material is clamped on the centrifuge 1, and after the centrifuge revolution reaches 1350 rpm, the material is ignited, and Al and CuO react in formula (1). Combustion reaction product Al 2 O 3 And Cu are stratified under the action of centrifugal force, the combustion reaction lasts for 11 seconds, and the machine stops after 14 minutes. 2 O 3 The performance of the ceramic lining composite copper tube of ceramic 5 and transition layer Cu4 is shown in Table 3.

[0054] ...

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Abstract

The aluminothermics prepared with CuO and Al is placed in the copper pipe, the aluminothermics also contains 2%-8% of SiO2, 1%-5% of CrO3, 2%-4% of Na2B4O7 and 2%-8% of ZrO2, the copper pipe in which the aluminothermics is placed is placed on the centrifuge, then the centrifuge is started, and the aluminothermics is lighted to make it produce 3CuO+2Al-Al2O3+3Cu+1194.4 KJ / mol aluminothermal reaction, and the heat quantity of discharged by said aluminothermal reaction can make product be molten instantaneously, under the action of centrifugal force the molten product can be separated according to its different density, after cooled, the Al2O3 ceramic lined composite copper pipe can be formed. The composite pipe has high hardness ceramic layer, good abrasive resistance.

Description

1. Technical field [0001] The invention belongs to the field of metallurgical equipment manufacturing, and relates to a method for manufacturing a composite copper tube, in particular to a method for manufacturing a ceramic-lined composite copper tube for a tube blank crystallizer. 2. Background technology [0002] Continuous casting production has the characteristics of energy saving and high efficiency, and has been widely used in steel production. At present, the domestic continuous casting ratio has exceeded 90%. The mold is a key spare part of the continuous casting machine, and its quality directly affects the surface quality of the continuous casting slab, the operation rate of the continuous casting machine and the cost of the continuous casting slab. With the development of high-efficiency continuous casting technology, higher requirements are placed on the quality of the mold, not only with high strength and good thermal conductivity, but also with high wear resistance ...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 杜建铭吴序堂符寒光
Owner XI AN JIAOTONG UNIV
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