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Discharge surface treatment electrode, process for producing discharge surface treatment electrode, discharge surface treatment apparatus and discharge surface treatment method

A technology of surface treatment and manufacturing method, which is applied in the direction of transportation and packaging, coating, metal material coating technology, etc., and can solve problems such as brittleness and weak particle bonding

Active Publication Date: 2006-07-05
MITSUBISHI ELECTRIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of molding an electrode using such a spherical powder, there is also a problem that the bond between the particles is weak and brittle due to the point contact between the powders.

Method used

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  • Discharge surface treatment electrode, process for producing discharge surface treatment electrode, discharge surface treatment apparatus and discharge surface treatment method
  • Discharge surface treatment electrode, process for producing discharge surface treatment electrode, discharge surface treatment apparatus and discharge surface treatment method
  • Discharge surface treatment electrode, process for producing discharge surface treatment electrode, discharge surface treatment apparatus and discharge surface treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0053] First, the outline of the discharge surface treatment method and its apparatus used in the present invention will be described. figure 2 It is a figure which shows the outline of the discharge surface treatment performed by the discharge surface treatment apparatus. The discharge surface treatment device 1 consists of a workpiece (hereinafter referred to as workpiece) 11 to form a coating 14, a discharge surface treatment electrode 12 for forming a coating on the surface of the workpiece 11, and the workpiece 11 and the discharge surface treatment. The electrodes 12 are electrically connected, and constitute a discharge surface treatment power source 13 that supplies a voltage to both to generate an arc therebetween. When the discharge surface treatment is performed in a liquid, a processing tank 16 is provided so that the gap between the workpiece 11 and the portion of the discharge surface treatment electrode 12 facing the workpiece 11 is filled with a processing liq...

Embodiment approach 2

[0078] In this Embodiment 2, the case where the electrode for discharge surface treatment is manufactured using several types of powders as an electrode material is demonstrated.

[0079] Table 2 is a table showing the relationship between the electrode material, the particle size of the powder of the electrode material, the hardness of the powder of the electrode material, and the hardness fluctuation of the electrode.

[0080]

make up

No

Electrode material

particle size

(μm)

powder

Hardness

hardness fluctuation

○: No fluctuation

△: slightly fluctuating

×: There are fluctuations

1

TiC+Ti

small(2)+small(3)

hard + soft

○

2

Cr 2 o 3 +Cr

Small (L6)+Large (10)

hard + soft

○

3

CBN+ Streite Carbide

1

Big(6)+Big(6)

hard+medium

×

4

Cr 2 o 3 + Ste...

Embodiment approach 3

[0090] As described in Embodiments 1 and 2, in order to manufacture an electrode having uniform hardness, the powder constituting the electrode must have a predetermined particle diameter. For example, in the case of forming a coating having lubricity and corrosion resistance in a high-temperature environment by discharge surface treatment, in order to manufacture an electrode with uniform hardness, it is necessary to manufacture the electrode with a powder having a particle size of 3 μm or less. However, powders with a particle size of 3 μm or less are commercially available in limited materials, and powders with a particle size of 3 μm or less are not available on the market for various materials of the coating film formed on the workpiece surface. For example, WC powder with an average particle diameter of about 1 μm is widely distributed in the market and can be obtained easily and cheaply, but it is difficult to obtain other powders. Therefore, it is impossible to manufac...

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Abstract

An electrode (12) is used for discharge surface treatment for causing, with a green compact obtained by compression-molding powder containing metal or a metallic compound as an electrode (12), electric discharge between the electrode (12) and a work piece (11) in a machining fluid (15) or in an air and forming, using discharge energy of the electric discharge, a film 14 consisting of an electrode (12) material or a substance generated by reaction of the electrode (12) material due to the discharge energy on a surface of the work piece. The powder has an average value of particle diameters not more than 3 micrometers.

Description

technical field [0001] The present invention relates to an electrode for discharge surface treatment which is composed of a powder compact obtained by compressing and molding powder of metal, metal compound or ceramics, and a method for producing the same, and to a method for producing the same. A pulse-shaped discharge is generated between the workpieces, and the discharge energy is used to form a covering film made of electrode materials or substances that react with the discharge energy on the surface of the workpieces. Furthermore, the present invention relates to a discharge surface treatment device and a discharge surface treatment method using the discharge surface treatment electrode. Background technique [0002] In recent years, for use in turboprops of gas turbine engines for aircraft and the like, there has been an increasing demand for coatings having wear resistance and lubricating properties under high-temperature environments. figure 1 It is a diagram schema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00B22F5/00B22F1/052
CPCB22F1/0014B22F2998/10C22C33/02B22F2009/044B22F2009/043C22C1/0433C23C26/00B22F5/00B22F1/052
Inventor 后藤昭弘秋吉雅夫松尾腾弘落合宏行渡边光敏古川崇
Owner MITSUBISHI ELECTRIC CORP
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