JPS605835A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material having remarkably improved wear resistance by adding specified amounts of Mn and Si, Bi or Ge to an alloy material consisting of specified percentages of Au, Pt, Ag, Cu and Zn. CONSTITUTION:To an alloy material consisting of, by weight, 70.5-72.5% Au, 7.5-9.5% Pt, 3.5-5.5% Ag, 13.5-15.5% Cu and 0.5-1.5% Zn are added 1-10wt% Mn and 0.5-3wt% at least one among Si, Bi and Ge without changing the ratio on the composition. A sliding contact material having remarkably superior wear resistance, producing very little powder owing to wear, and generating hardly any noise, is obtd.

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 70.5-7
2.5% by weight, I)t7.5-9.5% by weight, Ag3.
5 to 5.5% by weight, Cu 13.5 to 15.5% by weight,
Alloy materials consisting of 0.5-1.5% by weight of Zn have been widely used.

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

The present invention has been made in order to eliminate such drawbacks, and provides a sliding contact material that uses the above-mentioned alloy material as a base material and has improved wear resistance by adding a small amount of a specific element to the alloy material. That is.

The sliding contact material of the present invention has an A u of 70.5 to 72.5
Weight %, Pt 7.5-9.5 weight %, Ag 3.5-5.
5% by weight, Cu 13.5-15.5% heavy chain, Zn 0
．． Adding 1 to 10% by weight of Mn and St,+B to an alloy material consisting of 5 to 1.5% of heavy phase without changing its composition ratio.
It is made by adding 0.5 to 3% by weight of at least one of i+Ge.

In the sliding contact material of the present invention, A u 70.5 to 7
2.5% by weight, Pt7.5-9.5% by weight, Ag3.5
~5.5% by weight, Cu 13.5~15.5% by weight,
Adding 1 to 10 wt% of Mn and St to an alloy material consisting of 5 to 1.5 wt% of ZnO without changing the composition ratio.
The reason for adding 0.5 to 3% by weight of at least one of , Bi, and Ge is to make the alloy material hard to improve its wear resistance, and Mn is less than 1% by weight or Si.

If at least one of Bi and Ge is less than 0.5% by weight, the effect cannot be exhibited, and if Mn is more than 10% by weight, or 3i)34. If at least one type of Ge exceeds 3% by weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become unstable.

Next, using the sliding contact material according to the present invention and the conventional sliding contact material having the composition shown in the left column below, female brush wire rods each having a wire diameter of 0.7 were made, and each brush wire was cut into lengths of 8 mm. Then, two wires are placed in parallel and one end has a width of 10+ nm, a length of 13 mm, and a thickness of 0.
．． A brush contact was made by welding to the composite material of 2R and curving a 2R arc-shaped contact part on 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 IYl were obtained.

Test conditions Current: 0.6A Voltage: 12■ Load: Resistance load Rotation speed: 1000rpm Peripheral speed: 130” 120771/min Contact crab 100g Test time: 7 hours (blank below) As is clear from the table above It can be seen that the brush contacts of Examples 1 to 3 have significantly less wear than the conventional brush contacts, and that the contact resistance is low and stable.

This is simply due to the fact that the sliding contact material of the present invention constituting the brush wire of the brush contacts of Examples 1 to 3 contains Mn, 3i, and Bi.
This is because the addition of a small amount of Ge makes it hard and improves wear resistance.

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

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] A u 70.5-72.5% by weight, p j 7.5-7.5% by weight
9.5% by weight. Ag 3.5-5.5% by weight, Cu 13.5-15.
5% by weight. An alloy material consisting of 5 to 1.5% by weight of ZnO is mixed with 1 to 10% by weight of Mn and Si without changing the composition ratio. A sliding contact material containing 0.5 to 3% by weight of at least one of Bi and Ge.