Preparation method of electrical contact strengthened coating on metal surface

A metal surface and electrical contact technology, which is applied in the coating process and coating of metal materials, can solve the problems of coating powder material performance degradation, inconvenient thermal spraying method, coating powder waste, etc., and achieve high powder utilization rate , Combining the effects of excellent performance and simplified operation

Inactive Publication Date: 2013-05-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problems to be solved by the present invention are: the performance of the coating powder material is reduced during the spraying process, the thermal spraying method is not simple enough, the process noise is large, the waste of coating powder is serious, and the cost is high

Method used

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  • Preparation method of electrical contact strengthened coating on metal surface
  • Preparation method of electrical contact strengthened coating on metal surface
  • Preparation method of electrical contact strengthened coating on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for an electrical contact strengthening coating on a metal surface, comprising the steps of:

[0030] (1) Pretreatment of roughening, cleaning and descaling of the metal surface, wherein the metal matrix is ​​made of ductile iron QT 600-3, and the matrix structure is ferrite and pearlite;

[0031] (2) Prepare the liquid paint of the coating material and the binder slurry by mechanical stirring: mix 0-30 grams of cellulose acetate (CAS No.: 9004-35-7, Sinopharm Chemical Reagent Co., Ltd.), 0-40 Gram carboxymethylcellulose sodium (CAS No.: 9004-32-4, Sinopharm Chemical Reagent Co., Ltd.), 0-100ml ethylene glycol (CAS No.: 107-21-1, Sinopharm Chemical Reagent Co., Ltd.), 0 -250ml of acetone (CAS No.: 67-64-1, Sinopharm Chemical Reagent Co., Ltd.), 0-100ml of ethanol (CAS No.: 64-17-5, Sinopharm Chemical Reagent Co., Ltd.) and 0-150ml of distilled water are stirred and miscible , to obtain the binder slurry, the viscosity is 300-500mPa s; the powder co...

Embodiment 2

[0040] A preparation method for an electrical contact strengthening coating on a metal surface, comprising the steps of:

[0041] (1) Pretreatment of roughening, cleaning and descaling of the metal surface, wherein the metal substrate is made of white cast iron.

[0042] (2) The mixture of coating material and binder slurry is prepared by mechanical stirring method: 0-30 grams of cellulose acetate, 0-40 grams of sodium carboxymethyl cellulose, 0-100 ml of ethylene glycol, 0-250 ml of Acetone, 0-100ml ethanol and 0-150ml distilled water are stirred and miscible to obtain a binder slurry with a viscosity of 300-800mPa·s; the powder coating material is WC-12% Co powder; the coating powder is mixed with a binder containing The agent slurry is mechanically stirred and mixed for use;

[0043] (3) Presetting the above-mentioned powder slurry on the metal surface: spray the above-mentioned suspension on the surface of the metal substrate with an air spray gun, and the thickness of th...

Embodiment 3

[0046] A preparation method for an electrical contact strengthening coating on a metal surface, comprising the steps of:

[0047] (1) Pretreatment of roughening, cleaning and descaling of the metal surface, wherein the metal substrate is made of 45 steel.

[0048] (2) The mixture of coating material and binder slurry is prepared by mechanical stirring method: 0-30 grams of cellulose acetate, 0-40 grams of sodium carboxymethyl cellulose, 0-100 ml of ethylene glycol, 0-250 ml of Acetone, 0-100ml ethanol and 0-150ml distilled water are stirred and miscible to obtain a binder slurry with a viscosity of 300-500mPa·s; the powder coating material adopts self-made nano WC-1~4%MgO-1%Co( wt%) powder (WC[CAS No.: 12070-12-1], MgO[CAS No.: 1309-48-4], Co[CAS No.: 7440-48-4], all produced by Sinopharm Chemical Reagent Co., Ltd. , the equipment for mechanical activation of the powder is the QM-1SP4 planetary ball mill produced by Nanjing University Instrument Factory, the ball milling time...

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Abstract

The invention discloses a preparation method of an electrical contact strengthened coating on a metal surface. The method is characterized by comprising the steps of: roughening and pre-cleaning the metal surface; selecting a wear-resisting and corrosion-resisting powder material as a coating material; preparing bonder slurry and coating powder material into liquid coating and spraying the coating on the metal surface; and strengthening the pre-coating by an electrical contact strengthening device. The coating is molten on the metal surface by the electrical contact strengthening technology, so that the coating with good surface quality, less inner defect, high hardness and high wear resistance and corrosion resistance can be obtained on the metal surface, and the service life of a workpiece is prolonged. The pre-coating is prepared by the pre-coating method of the liquid coating, so that the powder utilization ratio is improved, the operation is simplified and the cost is saved; and the method is beneficial for industrial popularization and application.

Description

technical field [0001] The invention relates to an electric contact surface strengthening processing technology, in particular to a surface strengthening method for cladding an alloy powder coating on the surface of a metal substrate by using contact electric energy, and belongs to the technical field of material surface strengthening. Background technique [0002] Wear is one of the main failure modes of metal components. In various industrial sectors, during the normal use of many mechanical devices, contact, erosion, etc. often occur between the surfaces, resulting in a certain degree of wear and peeling of the surface of the mold. Over time, Components can fail due to excessive wear, contact fatigue. One of the current solutions is to prepare a reinforced coating on the surface of metal components to improve their wear resistance. [0003] There are many ways to prepare strengthened coatings, such as the research and application of high energy density heat sources such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 朱世根齐小犇朱正坤韩志兵
Owner DONGHUA UNIV
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