Electric arc spraying system and method for preparing micro metallurgically bonded spraying coating

An arc spraying and arc spraying gun technology, which is applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of complicated operation, easy deformation and high cost

Inactive Publication Date: 2012-10-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of rapid heating and cooling in spray welding and remelting technology, it is easy to cause cracks and coating peeling
Moreover, during spray welding and remelting, the heat input to the workpiece is quite large, and the workpiece will rise to a high temperature instantaneously (the temperature of the substrate may reach thousands of degrees), and it is easy to deform; and for laser remelting of large-area coatings There is still a big technical gap, the operation is complicated, and the cost is high

Method used

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  • Electric arc spraying system and method for preparing micro metallurgically bonded spraying coating
  • Electric arc spraying system and method for preparing micro metallurgically bonded spraying coating
  • Electric arc spraying system and method for preparing micro metallurgically bonded spraying coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Using Q235 as the substrate, the length, width and height are 8cm, 8cm, and 2mm respectively. Use commercially available ER50-2 welding wire, the wire diameters are 1.2mm and 1.6mm respectively, the wire diameter connected to the positive pole of the power supply is 1.6mm, and the wire diameter connected to the negative pole of the power supply is 1.2mm.

[0024] 1) Remove the oil and polish the Q235 steel plate cut according to the size, and then use a sandblasting machine to sandblast it.

[0025] 2) Fix the steel plate on the fixture to be sprayed.

[0026] 3) Keep the angle between the two wires at 30 degrees, the protruding length before the intersection of the two wires is 10mm, the plane where the two wires are located is perpendicular to the workpiece, and the distance between the intersection point of the axes of the two wires and the workpiece is kept at 15cm.

[0027] 4) Set the process parameters, adjust the wire feeding speed of the two wire feeders to mak...

Embodiment 2

[0029] Using Q235 as the substrate, the length, width and height are 8cm, 8cm and 4mm respectively. Use commercially available ER50-2 welding wire, the wire diameters are 1.2mm and 1.6mm respectively, the wire diameter connected to the positive pole of the power supply is 1.6mm, and the wire diameter connected to the negative pole of the power supply is 1.2mm.

[0030] 1) Remove the oil and polish the Q235 steel plate cut according to the size, and then use a sandblasting machine to sandblast it.

[0031] 2) Fix the steel plate on the fixture to be sprayed.

[0032] 3) Keep the angle between the two wires at 25 degrees, the protruding length before the intersection of the two wires is 10mm, and the plane where the two wires are located is perpendicular to the workpiece. The distance between the intersection point of the two wire axes and the workpiece is kept at 12cm.

[0033] 4) Set the process parameters, adjust the wire feeding speed of the two wire feeders to make them h...

Embodiment 3

[0035] Using Q235 as the substrate, the length, width and height are 8cm, 8cm and 6mm respectively. Use commercially available ER50-2 welding wire, the wire diameters are 1.2mm and 1.6mm respectively, the wire diameter connected to the positive pole of the power supply is 1.6mm, and the wire diameter connected to the negative pole of the power supply is 1.2mm.

[0036] 1) Remove the oil and polish the Q235 steel plate cut according to the size, and then use a sandblasting machine to sandblast it.

[0037] 2) Fix the steel plate on the fixture to be sprayed.

[0038] 3) Keep the angle between the two wires at 25 degrees, the protruding length before the two wires intersect is 12mm, and the plane where the two wires are located is perpendicular to the workpiece. The distance between the intersection point of the two wire axes and the workpiece is kept at 10cm.

[0039] 4) Set the process parameters, adjust the wire feeding speed of the two wire feeders to make them have the be...

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Abstract

The invention discloses an electric arc spraying system and a method for preparing a micro metallurgically bonded spraying coating. The method comprises the steps of: firstly connecting to form the electric arc spraying system, wherein the anode and the cathode of a first power supply are respectively connected with two spraying wires, the first power supply is connected with a first wire feeding machine, a second power supply is connected with a second wire feeding machine, a gas device is connected with an arc pistol and located at the center of the arc pistol, the two spraying wires are connected with the arc pistol, the accurate alignment of two polar wires is ensured through an alignment device and included angles of the two wires are adjusted; then fixing a workpiece on a clamp; and starting a spraying power supply and adjusting proper technological parameters to carry out spraying.. By using the technical scheme of the invention, the preparation method of the spraying coating also can be used for spraying priming layers and mass micro metallurgic bonding areas are formed between the coatings, so that matrixes can be micro metallurgically bonded with the coatings under non-overheating condition so as to improve the bonding strength.

Description

technical field [0001] The invention relates to the fields of welding and spraying in material processing, more specifically, an arc spraying system and a preparation method of a micrometallurgy spraying layer. Background technique [0002] The thermal spray coating presents a typical layered structure. During the spraying process, due to the atomization of the molten particles, the molten particles are cooled rapidly. When they reach the workpiece, they may have been partially solidified, and the combination with the substrate is mainly mechanical. , there is little metallurgical bonding, resulting in the coating is not compact, the bonding strength between the coating and the substrate is very low and other shortcomings. In this way, the coating is very easy to peel off, and its corrosion resistance and thermal shock resistance are low. Especially for large-thickness coatings, it is difficult to meet performance requirements for workpieces with harsh service conditions su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/06C23C4/131
Inventor 王惜宝程亮蒋欢欢王凤会王鑫
Owner TIANJIN UNIV
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