JPS59123788A - Electrical contact material and its manufacture - Google Patents

Abstract

PURPOSE:To obtain an electrical contact material with superior resistance to deposition and consumption by roughening the surface of the mixed body of an electrical contact material consisting of Ag and a metallic compound and by depositing Ag in the recesses to smoothen the surface of the body. CONSTITUTION:The surface of the mixed body 2 of an electrical contact material made of an Ag alloy prepd. by dispersing a metallic oxide such as Li2O or SnO2 in Ag is roughened, and innumerable fine ruggedness 3 are formed. The surface of ruggedness 3 is plated with Ag to form an Ag layer 7 fixing the innumerable recesses 4. By polishing the Ag layer 7, the projections of the body 2 are exposed to form a contact surface 6 consisting of Ag 5 and the body 2. An electrical contact material with superior resistance to welding and consumption is obtd.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electrical contact material and a method for producing the electrical contact material, particularly an electrical contact material that is a hybrid of silver and a metal oxide, and a method for producing the electrical contact material as a first invention. 2, it is useful as a silver alloy contact material for breakers, contactors, etc.

[Background technology]

Conventional electrical contact materials are known that are strengthened by dispersing oxidizing power, tin oxide, etc., for the purpose of improving the welding resistance of conductors and the consumability of vinegar. In this electrical contact material, the metal oxide not only impedes the anti-convergence properties, but also causes metal atoms and metal oxides to move and aggregate due to the arc generated during the opening and closing operations of the contact. Therefore, the contact resistance tends to increase during use.

[Purpose of the invention]

The present invention was made in view of the above considerations, and aims to reduce the contact resistance while maintaining the welding resistance and abrasion resistance of the electrical contact material made of silver and metal oxide.

[Disclosure of the invention]

That is, in the first invention relating to the structure of the electrical contact material, a large number of irregularities are formed on the surface of the hybrid tooth base of silver and metal oxide,
The present invention provides an electrical contact material characterized in that a smooth contact surface is formed by incorporating fixed pieces into the depressions of the unevenness, and the second invention relates to a method for manufacturing the electrical contact material according to the first invention. In this method, many irregularities are formed on the surface of a hybrid aggregate of silver and metal oxide, and a fixed silver layer is formed between the edges on the surface with these irregularities, and this silver layer is further polished to remove the above-mentioned irregularities. The present invention provides a method for producing an electrical contact material, characterized in that a contact surface is formed of a fixed trowel and a hybrid bond.

The first invention and the second invention will be explained in detail below. The electrical contact material according to the first invention is constructed as shown in FIG. That is, this electrical contact material 1 has a hybrid tooth base 2 of silver and metal oxide. This hybrid tooth table 2 has many irregularities 6 formed on its surface. The concave portions 4 forming the concavo-convex portions 6 are filled with silver 5 placed between the ridges 4. This concave 4
The shape of the hole may be a circular hole or a square hole, and there is no particular limitation, or the size thereof is a fine one measured in μ units.

The electrical contact material according to the present invention forms a smooth contact surface 6 with the silver 5 filled with 41 depressions and depressions 6 of the pores and the composite gear base 2 made of the above-mentioned screw and metal oxide. It is configured.

Next, a method for manufacturing the electrical contact material according to the invention of S2 will be explained. For example, a silver alloy in which lithium oxide, tin oxide, and various other metal oxides are dispersed in silver is used as the hybrid tooth base 2 made of silver and metal oxide. This hybrid tooth table 2
The surface of the substrate is roughened to form unevenness 6, and silver plating is applied to the surface having the unevenness 6 to form a silver layer 7 fixed in the above-mentioned depressions 4. Thereafter, the spider fat 7 is polished to expose the composite tooth base 2, thereby removing the silver 5 and the composite tooth base 2.
A contact surface 6 is formed with the above, and an electrical contact material according to the first invention is obtained.

Examples of the present invention will be described below.

A disc-shaped silver alloy made of silver and tin oxide with a thickness of 1.5 mm and a radius of 2 stations was used as the hybrid set 2. This hybrid tooth table 21
A large number of concave portions 4 with a depth of 60 μm and a radius of 15 μm are formed.
As shown in the figure, unevenness 6 was formed. The surface having the unevenness 6 is plated with silver to form a silver layer 7 fixed in the ridges 4 as shown in FIG. 2 to obtain an electrical contact material.

〔Effect of the invention〕

As described above, the electrical contact material according to the first invention obtained by the second invention has a contact surface made of silver 5, which is a good conductor, and silver and metal oxide, which have good welding resistance and wear resistance.
2 and 6 relate to the embodiment of the second invention, and FIGS. 6 is a cross-sectional view of a hybrid tooth stand with unevenness, Section 6 is a cross-sectional view of a mixed tooth stand on which a silver layer is formed, and FIG. 4 is a cross-sectional perspective view of the obtained electrical contact material. Toshimaru Takemoto (and 2 other people) Patent attorney representing Hitomatsu Shimokanko Co., Ltd. Figure 1 2nd sill Bullet diagram

Claims (1)

[Claims] (The surface of the hybrid aggregation of silver 11 and gold 1^ oxide is formed with a large number of concavities and convexities, and the settled silver is incorporated into the concavities of these concavities and convexities to form a flat contact surface. A contact material for holding Buddha and T. (2) A large number of irregularities are formed on the surface of the mixed tooth base of silver and metal oxide, and the silver layer fixed in the irregularities is spread across the surface with these irregularities. A method for producing an electrical contact material, characterized in that the silver layer is formed by polishing the silver layer to form a contact surface 1m composed of silver fixed in the recesses 4 and a composite surface metal.