JPS5918521A - Electric contact material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to electrical contact materials.

Silver-copper oxide has conventionally been used as one of the electrical contact materials manufactured by internal oxidation.

Silver-copper oxide has high electrical conductivity and low contact resistance, but is inferior in welding resistance and wear resistance.

Therefore, the inventor of the present invention has found that this electrical contact material has better welding resistance and
Electricity with contact characteristics with excellent wear resistance (1) As a result of intensive research to develop contact materials, we have discovered a fashionable electrical contact material.

One of the electrical contact materials of the present invention is bismuth 0.1-51
The material is composed of 1% to 10% by weight of manganese, 1 to 10% by weight of copper, and the balance silver, and is internally oxidized.

Another electrical contact material of the present invention is bismuth 0.1~
5% by weight, 1-10% manganese (it% and 1-1% copper)
It is a material consisting of 0% by weight, 0.01 to 0.5% by weight of iron group elements, and the balance silver, and 11 elements are internally oxidized.

In the electrical contact material of the present invention, the reason for using 0.1 to 5% by weight of bismuth, 1 to 10% by weight of manganese, and 1 to 10% by weight of copper is that less than 0.1% by weight of bismuth improves the welding resistance. If less than 1% by weight of manganese, arc resistance cannot be improved and sufficient abrasion resistance cannot be obtained, while if less than 1% by weight of copper, good and poor results are obtained in terms of welding resistance and abrasion resistance. Moreover, if bismuth exceeds 5% by weight, the melting point of the alloy will drop too low and internal oxidation at high temperatures becomes difficult (2), and if manganese exceeds 10% by weight, oxides will precipitate in layers, deteriorating contact resistance. If the amount of copper exceeds 10L [Ifit%, the spherical particles of copper oxide will become coarse and the contact resistance will become unstable (and the welding resistance will deteriorate, so bismuth 0.0.
1 to SfA amount%, manganese 1 to 10% by weight, copper 1 to 10%
Within the weight percent range, an electrical contact material with sufficiently satisfactory welding resistance, abrasion resistance, and contact resistance characteristics can be obtained.

Furthermore, in another one of the electrical contact materials of the present invention, hismuth is 0.1 to 5Tfi amount%, manganese is 1 to 10% by amount
, 1 to 10% by weight of copper and 0.0% of iron group elements. Old ~ 0.5ir
The reason for adding f(i)% is that when this is dispersed in an electrical contact material, the resulting uniform and fine dispersion of bismuth oxide, manganese oxide, and copper oxide further reduces consumption due to discharge. Te, 0. This is because if the amount is less than 0.511%, bismuth oxide, manganese oxide, and copper oxide will not be uniformly and finely dispersed, and if it exceeds 0.511%, the segregation of themselves will increase.

Next, in order to clearly demonstrate the effect of the electrical contact material according to the present invention (3), specific examples and conventional examples will be described.

Materials (1
After melting and making atomized powder, it was internally oxidized at 600°C and 29 atmospheres for 20 minutes, and this oxidized atomized powder was
Press & (R sintered, extrude it, process it with 5 pulls, and then cut it and process it into a header. Head diameter: 5m+i, head: 1111,
Fixed contact with leg diameter 2.5+im, leg length 2.5mm and 1iJ
1 part diameter 4mm, head height 1.1++m, leg diameter 2.8mm,
Leg length 1.6mm.

A working contact with a spherical head 517 was obtained.

However, there are bed-type electrical contacts made using the electrical contact materials of Examples 1 to 4, and glue beds of the same size made using the materials of the conventional examples shown in the left column of the table in the same manner as in the examples. When a type electrical contact was assembled into a hinge type relay and an opening/closing test was conducted under the following test conditions, the results shown in the right column of the table below were obtained.

Mini (test condition voltage: AClooV 50
11z current; input 40A, steady 10A (4
) Load: Resistance Switching/closing frequency: 20 times/min Switching/closing frequency: Contact force until welding occurs: 40 g (Left below) Bed-type electrical contacts made from contact materials have much better wear resistance and welding resistance than Lichenoto-type electrical contacts made from conventional electrical contact materials, and have almost the same excellent contact resistance characteristics. I know that there is.

As described in detail below, the electrical contact material of the present invention has contact properties that are superior in welding resistance and abrasion resistance than conventional electrical contact materials, so it is a revolutionary material that can replace conventional electrical contact materials. It can be said that it is something like that.

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. (7) 89-

Claims (1)

[Scope of Claims] 1) A material consisting of 0.1 to 5% by weight of bismuth, 1 to 10% by weight of manganese, 1 to 10% by weight of copper, and the balance being silver, and which is internally oxidized. Contact material. 2) 0.1-5% by weight of bismuth, 1-10% by weight of manganese, 1-10% by weight of copper, and 0.01-0.0% of iron group elements.
An electrical contact material consisting of 5% by weight and the balance silver and which is internally oxidized.