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Surface isolating layer of abrasion-resistant centrifugal pump overflowing part

A technology of flow-passing parts and isolation layers, which is applied to pump components, parts of pumping devices for elastic fluids, pumps, etc., can solve the problems of easy wear and aging, poor wear resistance, poor adhesion, etc., and achieve prolongation The effect of service life, increased anti-corrosion performance, increased formability and leveling

Inactive Publication Date: 2017-10-10
ANHUI LUYUAN PUMP&VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The wear-resistant multistage centrifugal pump for iron ore is used for special media, and the material and process are further improved. Imported bearings, PTFE graphite fiber packing seals or mechanical seals are used. The material of the flow-passing parts is stainless steel, which has corrosion-resistant shape and Good anti-cavitation performance, long service life, etc., can meet the use of various media conditions, environmental pollution, no pollution, and the flow-through parts may be easy to wear and age after long-term use. The existing technology is to solve this problem. One problem, a layer of isolation coating is usually coated on its surface, but the existing coating has poor adhesion and poor abrasion resistance. Therefore, further research on the isolation coating is needed

Method used

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Examples

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Embodiment 1

[0013] An isolation layer on the surface of a flow-passing part of a wear-resistant centrifugal pump. The material of the flow-passing part is wear-resistant white cast iron. The isolation layer includes a transition layer on the surface of the flow-passing part and a wear-resistant layer outside the transition layer. The transition The thickness of the layer is 60 μm. The transition layer is made of boron, silicon, titanium and nickel-chromium-molybdenum alloy. The transition layer also includes inevitable carbon and other impurities. The transition layer is coated with metal mixed powder on the surface of the substrate by TIG welding. The mixed metal powder contains 4% boron, 2% silicon, 42% titanium, 5% nickel, 12% molybdenum, and the balance is chromium and unavoidable impurities by weight percentage;

[0014] The wear-resistant layer is a hot-melt plastic layer with a thickness of 1.2mm. The method is to heat the surface of the flow-passing part covered with the transition...

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Abstract

The invention belongs to the technical field of machining of a centrifugal pump overflowing part and particularly relates to a surface isolating layer of an abrasion-resistant centrifugal pump overflowing part. The material of the overflowing part is anti-abrasion white cast iron. The isolating layer comprises a transition layer on the surface of the overflowing part and an abrasion-resistant layer outside the transition layer; the transition layer is made from boron, silicon, titanium and a nickel-chromium-molybdenum alloy; and the abrasion-resistant layer is a hot melting plastic layer. Compared with the prior art, the surface isolating layer of the abrasion-resistant centrifugal pump overflowing part has the following beneficial effects that by arranging the transition layer and the abrasion-resistant layer outside the overflowing part, the anti-corrosion performance of a pump is remarkably improved, the combining strength between the abrasion-resistant layer and a matrix can be improved by the transition layer, the hot melting plastic layer is arranged outside the transition layer, the formability and the leveling performance of the abrasion-resistant layer are improved, faults are not prone to occurrence in use, the work efficiency of the pump can be improved, the production process is controllable, and the service life of the overflowing part can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of processing flow-passing parts of a centrifugal pump, and in particular relates to a surface isolation layer of a wear-resistant centrifugal pump flow-passing part. Background technique [0002] The wear-resistant multistage centrifugal pump for iron ore is used for special media, and the material and process are further improved. Imported bearings, PTFE graphite fiber packing seals or mechanical seals are used. The material of the flow-passing parts is stainless steel, which has corrosion-resistant shape and Good anti-cavitation performance, long life, etc., can meet the use of various media conditions, environmental pollution, no pollution, and the flow-through parts may be easy to wear and age after long-term use. The existing technology is to solve this problem. One problem is usually to coat a layer of isolation coating on its surface, but the existing coatings have poor adhesion and poor abrasion res...

Claims

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Application Information

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IPC IPC(8): F04D29/02C22C37/10C22C37/08C22C27/06
CPCF04D29/026C22C27/06C22C37/08C22C37/10
Inventor 凤元军
Owner ANHUI LUYUAN PUMP&VALVE CO LTD
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