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Metal ceramic coating continuous casting crystallizer copper plate and preparation method thereof

A metal-ceramic coating, continuous casting mold technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of high brittleness, high cost, high oxygen combustion temperature, and achieve small brittleness and pores. Low rate and the effect of increasing the amount of steel passing through

Active Publication Date: 2018-11-20
东创博实(沈阳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, there are two kinds of HVOF fuels, kerosene and propane. The flame temperature in the combustion chamber is 2900-3100°C, and the flame velocity reaches 700-1000m / s; It can ensure the hardness of the sprayed material, but it is brittle

Method used

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  • Metal ceramic coating continuous casting crystallizer copper plate and preparation method thereof
  • Metal ceramic coating continuous casting crystallizer copper plate and preparation method thereof
  • Metal ceramic coating continuous casting crystallizer copper plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of preparation method of cermet coating continuous casting crystallizer copper plate adopts HVAF process, and its process steps are as follows:

[0042] step 1:

[0043] (1) Alignment of the surface of the copper plate: Straighten the copper plate with a press. The flatness of the wide-side copper plate is required to be <1mm, and the narrow-side copper plate is <0.5mm, and the straightened copper plate is obtained.

[0044] (2) Degreasing the surface of the copper plate: use industrial alcohol to degrease the surface of the straightened copper plate, and use acetone to purify the surface to be sprayed before spraying.

[0045] Step 2: Sandblasting and preheating the surface of the copper plate

[0046]Set the robot program, start the HVAF spraying system, ignite and send sandblasting powder. The sandblasting powder uses 120-200 mesh white corundum sand. The sandblasting roughens the surface of the copper plate and preheats the copper plate at the same time. The...

application example 1

[0064] In July 2013, a steel factory used the cermet-coated continuous casting crystallizer copper plate prepared by Example 1 of the present invention. After use, it was found that the cermet-coated continuous casting mold copper plate of the present invention has the following advantages:

[0065] 1. The heat flow is lower than that of the continuous casting mold copper plate without coating, basically between 1300-1550J / s, which is relatively stable and is conducive to controlling the heat transfer on the narrow surface. The steel passing through 76,000 tons, the maximum wear amount is 0.5mm, far less than The wear amount of 2-3mm when the bare copper plate passes through 15,000 tons of steel;

[0066] 2. Because there is almost no wear, the taper of the narrow copper plate is well maintained;

[0067] 3. Reduce the workload of disassembly and repair;

[0068] 4. Prolong the service life of the copper plate.

application example 2

[0070] In March 2015, a steel mill used the cermet-coated continuous casting crystallizer copper plate prepared by Example 1 of the present invention. After use, it was found that the cermet-coated continuous casting mold copper plate of the present invention has the following advantages:

[0071] 1. The average amount of passing steel is increased by 7 times;

[0072] 2. The average service life of copper plates reaches 420,000 tons, an increase of 14 times;

[0073] 3. The shape of the billet corner is stable, greatly reducing cracks;

[0074] 4. Stable heat flow, reducing bad edges;

[0075] 5. Improve the rhythm of crystallizer turnover and reduce labor intensity.

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Abstract

The invention discloses a metal ceramic coating continuous casting crystallizer copper plate and a preparation method thereof, and belongs to the technical field of continuous casting crystallizer surface treatment. The preparation method comprises the following steps that a copper plate is straightened to undergo oil removal; an HVAF spraying system taking air as a combustion improver is started,sand blasting preheating is carried out, then a spraying process program is started, ignition is achieved, a spraying material of WC-17Co powder is supplied, and a metal ceramic layer is sprayed on the preheated copper plate to obtain a copper plate with the metal ceramic coating; and a three-layer hole sealing process is adopted for carrying out hole sealing on the surface of the copper plate, and then surface layer curing is carried out on the copper plate, wherein the hardness of the obtained metal ceramic coating is HV1250-HV1400, the porosity is less than or equal to 1%, and the bindingforce of the metal ceramic coating and the continuous casting crystallizer copper plate is greater than or equal to 70 MPa. Therefore, the prepared metal ceramic coating continuous casting crystallizer copper plate is high in coating hardness, small in brittleness, low in porosity and high in binding force.

Description

technical field [0001] The invention relates to the technical field of continuous casting crystallizer surface treatment, in particular to a cermet-coated continuous casting crystallizer copper plate and a preparation method thereof. Background technique [0002] Mold copper plate is the core component of continuous casting equipment in steelmaking plants. The molten steel is cooled in the crystallizer, preliminarily cooled and solidified, and uniformly formed into a billet shell with a certain thickness. The solidification process is carried out under the action of gravity and external vibration device, and the billet shell and the copper plate wall of the crystallizer are in continuous and relative motion. For this reason, the wear resistance of the inner surface of the copper plate of the continuous casting crystallizer is better to improve the service life. In the method of improving the wear resistance of the inner surface of the copper plate of the crystallizer, the ...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06C23C4/18B22D11/059
CPCB22D11/059C23C4/06C23C4/129C23C4/18
Inventor 刚占库涂赣峰姚顺宇李宝雄夏广林庄绪成
Owner 东创博实(沈阳)科技有限公司
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