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Gas nozzle cold spraying method and its special clamping device with repairable corners

A gas nozzle and clamping device technology, which is applied in the direction of pressure inorganic powder coating, heating inorganic powder coating, etc., can solve problems that do not involve the corner treatment of gas nozzles, and improve the air flow field and particle flow field Distribution, solution to corner inclination, high efficiency effect

Active Publication Date: 2017-04-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Equally, this invention cannot be directly used to solve the corner problem of gas nozzle cold spray repair
[0010] To sum up, the existing technology is generally aimed at the cold spray technology itself and the repair technology, and does not involve the treatment of the corners of the gas nozzle.

Method used

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  • Gas nozzle cold spraying method and its special clamping device with repairable corners
  • Gas nozzle cold spraying method and its special clamping device with repairable corners
  • Gas nozzle cold spraying method and its special clamping device with repairable corners

Examples

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Comparison scheme
Effect test

example 1

[0057] Using a matching clamping device, that is Figure 4 The special clamping device 2 shown is used to repair the gas nozzle 1 by cold spraying process. The main gas and powder feeding carrier gas are both nitrogen, including gas pressure 2.2MPa, gas temperature 475°C, powder feeding rate 3r / min, spray powder is chromium Zirconium copper powder, the average particle size is 23um, the thickness of the spraying repair is 1.5mm, the thickness of the matching liner 2c, 2c' is 15mm, the thickness of the outer frame 2a is clamped and fixed to 35mm, and the transition liner is to adjust the width of the liner 2b to 20mm, and the matching liner The gap between the plates is less than 0.2mm, and the gap between the matching liner and the gas nozzle is less than 0.2mm. The results of the cold spray coating show that the overall repair of the gas nozzle and the treatment of the corners are good.

example 2

[0059] The integral clamping device is used to repair the gas nozzle 1 by cold spraying process. The main gas and powder feeding carrier gas are both nitrogen, including gas pressure 2.5MPa, gas temperature 460°C, powder feeding rate 1.5r / min, and the spray powder is copper. powder, the average particle size is 28um, the thickness of the spraying repair is 2.5mm, the thickness of the matching lining is 20mm, the thickness of the clamping fixed base plate and the frame is 50mm, the width of the transition lining is 15mm, the gap between the matching lining is less than 0.3mm, the lining and the gas The gap between nozzles is less than 0.3mm. The results of the cold spray coating show that the overall repair of the gas nozzle and the treatment of the corners are good.

example 3

[0061] The gas nozzle is repaired by cold spraying process using a matching clamping device. The main gas and the carrier gas for powder feeding are both nitrogen, including gas pressure 3.0MPa, gas temperature 455°C, powder feeding rate 2.5r / min, and the spray powder is chromium zirconium copper. Powder, the average particle size is 25um, the thickness of the spraying repair is 2.0mm, the thickness of the matching lining is 25mm, the thickness of the clamping and fixing base plate and frame is 44mm, the width of the transition lining is 25mm, the gap between the matching lining is less than 0.1mm, the lining and the gas The gap between nozzles is less than 0.1mm. The results of the cold spray coating show that the overall repair of the gas nozzle and the treatment of the corners are good.

[0062] In summary, the present invention uses a special clamping device for gas nozzles for cold spray repair, which can establish a transition zone for coating repair, improve the distrib...

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PUM

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Abstract

The invention discloses a gas nozzle cold-spraying method capable of repairing the corners and a special clamping device thereof. The clamping device comprises an outer frame, a cooperative lining plate, and an adjusting lining plate. The cooperative lining plate has cooperative surfaces that cooperate with the surfaces of a gas nozzle, the cooperative surfaces form an inner cavity that cooperates with the surfaces of the gas nozzle, and the adjusting plate is arranged between the inner surface of the outer frame and the outer surface of the cooperative lining plate and is fixed on the outer frame and the cooperative lining plate through a clamping bolt. In another embodiment, the clamping device comprises a clamping body, which can form binding surfaces that cooperate with each surface of a gas nozzle, and the binding surfaces can form an inner cavity that cooperates with the gas nozzle. A cold-spraying repair coating transition area can be established to improve the flow field distribution uniformity of air flow and particle flow so as to integrally repair the gas nozzle at one time, thus the repair cost is effectively reduced, the efficiency is high, the cost is low, and the special corner clamping device has the advantages of simple structure, easy production, and convenient maintenance.

Description

technical field [0001] The invention relates to a method and device for flame cleaning the surface of casting slabs in continuous casting production, in particular to a method for integrally repairing a gas nozzle for flame cleaning on the surface of casting slabs and a special clamping device for corner treatment. Background technique [0002] In continuous casting production, the billet needs to be cleaned on the surface, usually by using the flame of the gas nozzle for surface cleaning. Such as figure 1 Shown, the side 1a of the gas nozzle 1 used for cleaning is easy to burn and must be repaired. The gas nozzle 1 is usually made of copper alloy, such as chrome-zirconium copper. The repair methods include surfacing and electroplating and other methods. These methods have their own advantages and disadvantages: the electroplating method can only replenish nickel, but cannot repair the chromium-zirconium-copper material of the gas nozzle 1; and the surfacing repair proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
CPCC23C24/04
Inventor 张宇军张俊宝梁永立职建军胡暑名杨晓萍史弼
Owner BAOSHAN IRON & STEEL CO LTD