JPS59100239A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material using produced oxide as a lubricant and having improved wear resistance by adding a specified percentage of one or more among Nb, In, Ba and Cd to an Au alloy material contg. a prescribed percentage each of Pt, Ag, Cu and Ni. CONSTITUTION:A sliding contact material is obtd. by adding 0.5-15wt% one or more among Nb, In, Ba and Cd to an Au alloy material consisting of, by weight, 69-71% Au, 4-6% Pt, 9-11% Ag, 13-15% Cu and 0.5-1.5% Ni without changing the ratio in the composition. The sliding contact material is much superior to a conventional sliding contact material in wear resistance, and it produces a very small amount of powder owing to wear and generates hardly noise. The sliding contact material gives a brush contact having lower and more stable contact resistance than a brush contact made of the conventional sliding contact material.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, various materials have been used as sliding contact materials, and in particular, as materials for printed contacts, Au69%, Cu13
Alloy materials consisting of ~15% by weight Ni and 0.5-1.5% by weight Ni were widely used.

However, printing contacts made of this alloy material have poor abrasion resistance when sliding with the commutator, and are prone to generating abrasion powder, causing noise.

The present invention was made in order to eliminate such drawbacks, and it is a sliding material that uses the alloy material as a device and adds a specific material to it, uses the generated oxide as a lubricant, and has improved wear resistance. The purpose is to provide a moving contact material.

The sliding contact material of the present invention contains 69 to 71% by weight of Au, Pt
4-6% by weight, Ag9-11% by weight, Cu13--15
% by weight, and 0.5 to 1.5% by weight of Ni, without changing the composition ratio, Nb, In, Ba, C.
d is added in an amount of 0.5 to 15% by weight.

In the sliding contact material of the present invention, Au69 to 71% by weight
, Pt4-6% by weight, Ag9-11% by weight, Cu13-
15% by weight of Nb, In, and Ba without changing the composition ratio.
The reason why 0.5 to 15% by weight of at least one of Cd and Cd is added is to generate an appropriate amount of oxide that acts as a lubricant to improve the wear resistance of the alloy material, and less than 0.5% by weight. If the amount of oxide generated is small, it cannot be effective as a lubricant, and if it exceeds 15% by weight, the amount of oxide generated increases, resulting in high contact resistance and instability. be.

Next, using the sliding contact material according to the present invention and the conventional sliding contact material having the compositions shown in the left column below, each wire diameter was 0.7 mm.
Brush wire rods were made, each cut into 8 mm lengths, and 2
One roll of this line is 10mm wide, 13mm long, and 0 thick.
．． A brush contact was made by welding to a 2 mm base material and bending a 2R arc-shaped contact part at the other end. Then, each brush contact was brought into contact with a disc-shaped commutator, the commutator was rotated in positive and reverse directions, and a sliding test was conducted under the following test conditions. The amount of wear and contact resistance were measured. The results shown in the column were obtained.

Test conditions Current: 0.6 A Voltage: 12 V Load: Resistance load Rotation speed: 1000 rpm Peripheral speed: 130-120 m/min Contact force: 100 g Test time: 7 hours As is clear from the table above, the brushes of Examples 1 to 4 It can be seen that the contact has significantly less wear than the conventional brush contact, and the contact resistance is low and stable.

This is simply due to the fact that the sliding contact material of the present invention, which constitutes the brush wire body of the brush contacts of Examples 1 to 4, is
This is because oxides such as n, Ba, and Cd are generated, and these oxides act as lubricants, improving wear resistance. In addition, since the oxide is soft, it is easily removed by the sliding action, so the contact resistance is low and does not change stably.

As detailed above, according to the sliding contact material according to the present invention,
It has significantly better wear resistance than conventional sliding contact materials, generates extremely little wear powder, generates almost no noise, and has a lower and more stable contact resistance than conventional sliding contact materials. This has the effect that it is possible to obtain a brush contact point with

Claims (1)

[Claims] Au69-71% by weight, Pt4-6% by weight, Ag9-1
1% by weight, Cu13-15% by weight, Ni0.5-1.5
% by weight of at least one of Nb, In, and BaCd without changing the microstructure ratio.
A sliding contact material containing 5% by weight.