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A spray welding method for chemical pump flow parts

A technology for overcurrent components and chemical pumps, which is applied in melting spray plating, metal material coating process, coating, etc., can solve the problems of loss of spray welding, poor bonding strength, and high brittleness of cast iron, and achieve the improvement effect. , Improve the effect of wear resistance and not easy to shell

Active Publication Date: 2019-08-20
ANHUI LUYUAN PUMP&VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of modern technology, pumps have long been used in various industries, but the flow-passing parts of the pump are prone to various wear and corrosion during the working process. In order to improve the wear resistance and corrosion resistance of the flow-passing parts of the water pump, Corrosion-resistant cast iron and stainless steel materials are often used to produce flow-passing parts, but cast iron is brittle, and it is easy to crack during manufacturing, transportation and use, resulting in product scrapping, and the production cost of the overall stainless steel plate is too high. Spray welding
Among them, the spray welding process can effectively improve the prevention of cast iron cracking, but in the prior art, the spray welding layer often has poor bonding strength with the cast iron substrate, and it is easy to produce shelling, cracking, etc., and loses the role of spray welding

Method used

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  • A spray welding method for chemical pump flow parts

Examples

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Effect test

Embodiment 1

[0016] A spray welding method for wetted parts of a chemical pump, comprising the following steps:

[0017] (1) Spray activation liquid on the flow-passing parts, wherein the activation liquid is made of the following components by weight: 8 parts of sodium ethylenediaminopropanesulfonate, 4 parts of 9-decenoic acid, 3,4,5-tri 12 parts of fluorobenzoic acid, 2 parts of potassium tripolyphosphate, 3 parts of citric acid, 180 parts of water;

[0018] (2) After 20 minutes, clean the activation solution on the flow-passing parts, then use a hot air blower to dry the flow-passing parts, and preheat the flow-passing parts to 160°C;

[0019] (3) Spray a layer of mixed alloy powder evenly on the surface of the preheated flow parts, and then carry out spray welding and remelting treatment on the flow parts. When remelting, the distance between the muzzle of the remelting gun and the surface of the workpiece is 30mm. The distance from the edge of the spray welding layer is 10mm. When t...

Embodiment 2

[0024] A spray welding method for wetted parts of a chemical pump, comprising the following steps:

[0025] (1) Spray activation solution on the flow-passing parts, wherein the activation solution is made of the following components by weight: 9 parts of sodium ethylenediaminopropanesulfonate, 5 parts of 9-decenoic acid, 3,4,5-tri 13 parts of fluorobenzoic acid, 3 parts of potassium tripolyphosphate, 4 parts of citric acid, 190 parts of water;

[0026] (2) After 25 minutes, clean the activation solution on the flow-passing parts, then use a hot air blower to dry the flow-passing parts, and preheat the flow-passing parts to 180°C;

[0027] (3) Spray a layer of mixed alloy powder evenly on the surface of the preheated flow parts, and then carry out spray welding and remelting treatment on the flow parts. When remelting, the distance between the muzzle of the remelting gun and the surface of the workpiece is 35mm. The distance from the edge of the spray welding layer is 13mm. Wh...

Embodiment 3

[0032] A spray welding method for wetted parts of a chemical pump, comprising the following steps:

[0033] (1) Spray activation solution on the flow-passing parts, wherein the activation solution is made of the following components by weight: 10 parts of sodium ethylenediaminopropanesulfonate, 6 parts of 9-decenoic acid, 3,4,5-tri 15 parts of fluorobenzoic acid, 4 parts of potassium tripolyphosphate, 5 parts of citric acid, 200 parts of water;

[0034] (2) After 30 minutes, clean the activation solution on the flow-passing parts, then use a hot air blower to dry the flow-passing parts, and preheat the flow-passing parts to 200°C;

[0035] (3) Spray a layer of mixed alloy powder evenly on the surface of the preheated flow parts, and then carry out spray welding and remelting treatment on the flow parts. When remelting, the distance between the muzzle of the remelting gun and the surface of the workpiece is 40mm. The distance from the edge of the spray welding layer is 15mm. W...

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Abstract

The invention discloses a spray-welding method for a chemical pump flow passage component. The spray-welding method comprises the following operation steps that (1) an activation solution is sprayed on the flow passage component; (2) after 20-30 min, the activation solution on the flow passage component is washed out, and then the flow passage component is blow-dried through a hot-air blower and is preheated to 160-200 DEG C; and (3) a layer of mixed alloy powder is evenly sprayed on the surface of the preheated flow passage component, then the flow passage component is subjected to spray-welding remelting treatment, during remelting, the distance between a gunpoint of a remelting gun and the surface of a workpiece is 30-40 mm, the distance between the gunpoint of the remelting gun and the edge of a spray-welding layer is 10-15 mm, and when specular reflection occurs, a flame is forwards moved, and then the spray-welding layer is naturally cooled. By adoption of the pray-welding method provided by the invention, the abrasion and corrosion resistant properties of the cast iron flow passage component can be effectively promoted, in the using process, the cast iron flow passage component is not prone to cracking, the manufactured spray-welding layer is not prone to shell falling and peeling off, and therefore the quality of the flow passage component is effectively promoted.

Description

technical field [0001] The invention belongs to the technical field of spray welding, and in particular relates to a spray welding method for a chemical pump flow-through component. Background technique [0002] With the development of modern technology, pumps have long been used in various industries, but the flow-passing parts of the pump are prone to various wear and corrosion during the working process. In order to improve the wear resistance and corrosion resistance of the flow-passing parts of the water pump, Corrosion-resistant cast iron and stainless steel materials are often used to produce flow-passing parts, but cast iron is brittle, and it is easy to crack during manufacturing, transportation and use, resulting in product scrapping, and the production cost of the overall stainless steel plate is too high. Perform spray welding. Among them, the spray welding process can effectively improve the prevention of cast iron cracking, but in the prior art, the spray weld...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/129C23C4/06C23C4/02
Inventor 凤元军
Owner ANHUI LUYUAN PUMP&VALVE CO LTD
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