JPS59110744A - Slide contact material - Google Patents

Abstract

PURPOSE:To develop a slide contact material high in a softening temp. and excellent in welding resistance, by adding at least one of Al, Ga, Mn and Ni to a Au-Ag-Cu type slide contact material grade alloy with a specific composition. CONSTITUTION:As a slide contact material, especially, a brush contact material, an alloy prepared by adding 0.5-15wt% of at least one of Al, Ga, Mn and Ni to an alloy having a composition consisting of 61.5-63.5wt% Au, 28-30wt% Ag and 7.5-9.5wt% Cu without changing the compositional ratio thereof is used. By this method, the brush contact material high in a softening temp. and welding resistance is obtained.

Description

[Detailed description of the invention] The present invention relates to improvements in sliding contact materials.

Conventionally, various materials have been used as sliding contact materials, and in particular, as materials for brush contacts, A u 61.5-6
3.5% by weight, Ag28-30% by weight, Cu 7.5
Alloy materials consisting of ~9.5% by weight were widely used.

However, brush contacts made of this alloy material have a low softening temperature and tend to adhere to each other when sliding against the commutator, resulting in abrasion powder, which causes noise.

The present invention has been made in order to eliminate such drawbacks (1), and uses the above-mentioned alloy material as a base material and adds a specific material to it to increase the softening temperature and improve the adhesion resistance. The present invention aims to provide a sliding contact material.

The sliding contact material of the present invention has an A u of 61.5 to 63.5
Weight%, Ag28-30wt%, Cu7.5-9.5
At least one of AI, Ga, Mn, and Ni is added from 0.5 to 0.5% by weight without changing the composition ratio of the alloy material.
It is made by adding 15% by weight.

In the sliding contact material of the present invention, A u 61.5 to 6
3.5% by weight, Ag2B ~ 30% by weight, Cu7.5
The reason why at least one of AI, Ga, Mn, and Ni is added in an amount of 0.5 to 15% by weight to an alloy material consisting of ~9.5% by weight without changing the composition ratio is that This is to increase the softening temperature to improve the adhesion resistance of 0.
If it is less than 5% by weight, the effect cannot be exhibited, and if it exceeds 15% by weight, the amount of oxides generated increases, contact resistance becomes high, and it becomes unstable.

Next, using the (2) sliding contact material according to the present invention and the conventional sliding contact material having the component compositions shown in the left column below, the wire diameter was 0.
．． Make a 7fl brush wire, cut each into 8 lengths, put two of them in parallel, and one end has a width of IQmm, a length of 13fi,
A brush contact was made by welding to a base material with a thickness of 0.2 mm, and by bending a 2R arc-shaped contact portion at the other end. Then, each brush contact was brought into contact with a disk-shaped commutator, and the commutator was rotated in forward and reverse directions to perform a sliding test under the following test conditions, and the wear amount and contact resistance were measured. The results shown in the column were obtained.

Test conditions Current: 0.6A Voltage = 12■ Load: Resistive load Rotation speed: 1000 rpm Peripheral speed
:130-120 m/min contact crab 10
0g Test time = 7 hours (blank below) (3) (4) As is clear from the table above, the brush contacts of Examples 1 to 4 had significantly less wear and contact resistance than the conventional brush contacts. It can be seen that it is equally low and stable. This is simply due to the fact that the sliding contact material of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 4, contains Al, Ga, Mn, and Ni during sliding.
This is because the addition of at least one of these increases the softening temperature and improves the adhesion resistance.

As detailed above, according to the sliding contact material according to the present invention,
It has significantly superior wear resistance compared to conventional sliding contact materials, generates extremely little abrasion powder, generates almost no noise, and has contact resistance equivalent to that of conventional sliding contact materials. It has the advantage of being able to obtain a brush contact point.

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. (5)

Claims (1)

[Claims] AI, Ga, Mn, and N are added to an alloy material consisting of 61.5 to 63.5% by weight of Au, 28 to 30% by weight of Ag, and 7.5 to 9.5% by weight of Cu without changing the composition ratio.
A sliding contact material containing 0.5 to 15% by weight of at least one type of i.