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Metal part surface repair material and metal part surface processing technology and application

A technology for metal parts and surface repair, applied in the direction of metal material coating process, coating, fusion spraying, etc. problems, to achieve the effects of excellent self-melting performance, excellent high temperature wear resistance and corrosion resistance, prolonging service life and maintenance cycle

Pending Publication Date: 2020-08-07
LONGKOU ZHONGYU THERMAL MANAGEMENT SYST SCIAND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some problems in the above technology at this stage: (1) The problem of laser remelting is mainly that it is easy to cause cracks, shedding and holes in materials such as ceramic coatings under the conditions of extremely rapid heating and cooling; due to the small laser spot, For large-area remelting, it needs to be completed by overlapping technology, which will cause instability of coating performance in terms of hardness and other aspects
(2) There are many similarities between electron beam remelting and laser remelting, and its shortcomings are mainly reflected in the fact that electron beam heating and remelting must be in a vacuum environment, so the remelting of large parts and deep holes is greatly restricted
(3) Compared with other remelting methods, tungsten argon arc (TIG) remelting has a greater impact on the deformation of the workpiece, and is not suitable for repairing workpieces with high schedule requirements
(4) Induction remelting is suitable for batch parts with simple shapes, and it is difficult to apply for parts with complex shapes

Method used

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  • Metal part surface repair material and metal part surface processing technology and application
  • Metal part surface repair material and metal part surface processing technology and application
  • Metal part surface repair material and metal part surface processing technology and application

Examples

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Effect test

no. 1 example

[0033] A surface treatment process for metal parts, comprising the steps of:

[0034] (1) Pretreatment: first use a degreasing agent to remove oil stains and other pollutants on the surface of the workpiece; then use 20 mesh white corundum to sandblast and polish the surface to a roughness of 90um; remove scale, rust and other attachments on the surface of the workpiece to achieve surface cleanliness Sa3.0; After the grinding is completed, repair the surface of the workpiece without visible grease, dirt, scale, rust and other attachments, so that the metal matrix of the part is exposed and ready for use;

[0035](2) Flame thermal spraying: The following powder alloys are used as repair materials for spraying (particle size is 30-100 μm): by mass percentage, Cr 16%, Si 4%, B 4%, Cu 3%, Mo 3%, Fe 2.5%, C 0.5%, WC 11%, Ni balance. The specific process and parameters of flame spraying: first heat the workpiece to make the surface temperature of the workpiece reach 120°C; then use...

no. 2 example

[0043] A surface treatment process for metal parts, comprising the steps of:

[0044] (1) Pretreatment: first use degreaser to remove oil stains and other pollutants on the surface of the workpiece; then use 20 mesh white corundum to sandblast and polish the surface to a roughness of 125um; remove scale, rust and other attachments on the surface of the workpiece to achieve surface cleanliness Sa3.0; After the grinding is completed, repair the surface of the workpiece without visible grease, dirt, scale, rust and other attachments, so that the metal matrix of the part is exposed and ready for use;

[0045] (2) Flame thermal spraying: The following powder alloys are used as repairing materials for spraying (particle size is 30-100 μm): by mass percentage, Cr: 10%, Si: 1%, B: 10%, Cu: 10%, Mo: 1%, Fe: 5%, C: 3%, WC: 20%, Ni balance. The specific process and parameters of flame spraying: first heat the workpiece to make the surface temperature of the workpiece reach 100°C; then u...

no. 3 example

[0047] A surface treatment process for metal parts, comprising the steps of:

[0048] (1) Pretreatment: first use degreaser to remove oil stains and other pollutants on the surface of the workpiece; then use 20 mesh white corundum to sandblast and polish the surface to a roughness of 75um; remove scale, rust and other attachments on the surface of the workpiece to achieve surface cleanliness Sa3.0; After the grinding is completed, repair the surface of the workpiece without visible grease, dirt, scale, rust and other attachments, so that the metal matrix of the part is exposed and ready for use;

[0049] (2) Flame thermal spraying: The following powder alloys are used as repair materials for spraying (particle size is 30-100 μm): by mass percentage, Cr 20%, Si 10%, B 1%, Cu 1%, Mo 10%, WC 1%, Ni balance. The specific process and parameters of flame spraying: first heat the workpiece to make the surface temperature of the workpiece reach 80°C; then use the oxygen-propane high-...

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Abstract

The invention relates to the technical field of automobile part surface repair, in particular to a metal part surface repair material and a metal part surface processing technology and application. The metal part surface repair material is prepared from the following components in percentage by mass: 10-20% of Cr, 1-10% of Si, 1-10% of B, 1-10% of Cu, 1-10% of Mo, 0-5% of Fe, 0-3% of C, 1-20% of WC, and the balance of Ni. The metal part surface repair material has the excellent self-fluxing performance, and a coating prepared through the repair material has the excellent high-temperature wearresistance and corrosion resistance. When the thickness of the coating reaches the 1.5mm ultra-thick thickness, the excellent coating anti-cracking performance is still achieved, and common chromel alloy powder cannot reach the excellent coating anti-cracking performance.

Description

technical field [0001] The invention relates to the technical field of auto parts surface repair, in particular to a metal part surface repair material and a metal part surface treatment process and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The faults caused by wear and tear in the engine account for a large proportion of various faults. Due to poor lubrication, poor mating materials, poor manufacturing and assembly quality, deterioration of service conditions, the influence of dust and temperature, and the effect of alternating loads, all four main forms of wear will be promoted: abrasive wear, adhesive wear, corrosion Wear and surface fatigue wear ap...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C32/00C23C4/067C23C4/129
CPCC22C19/055C22C32/0052C23C4/067C23C4/129
Inventor 李小霞崔琛焕李小都虞佳丽
Owner LONGKOU ZHONGYU THERMAL MANAGEMENT SYST SCIAND TECH
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