JPS605833A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material having remarkably improved wear resistance by adding specified amounts of In and Si, Zr, Ge or Ga 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% In and 0.5-3wt% at least one among Si, Zr, Bi, Ge and Ga without changing the ratio in the composition. A slidind 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 materials for tonerine brush contacts include A u 70.5-7.
2.5% by weight, 1) tl, 5-9.5% by weight, Ag3.
An alloy material consisting of 5 to 5.5 weight percent Cu, 13.5 to 15.5 weight percent Cu, and 5 to 1.5 weight percent ZnO was 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 uses the above-mentioned alloy material as a base material and adds a small amount of a specific element to it, uses the generated oxide as a lubricant, and improves wear resistance. The present invention aims to provide a sliding contact material with improved properties.

The sliding contact material of the present invention has an A u of 70.5 to 72.5
Vehicle weight%, PtT, 5-9.5%, Ag3.5-5.
5] iii%, Cu 13.5-15.5% by weight, Z
rr, 0.5 to 1.5% by weight of In and 1 to 10% by weight of St without changing the composition ratio.
, Zr, Bi, Ge.

At least one type of Ga is added in an amount of 0.5 to 3% by weight.

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, Z
In an alloy material consisting of n 0.5 to 1.5% by weight, l n is changed to l ~ 1Ofii @ without changing the composition ratio.
H% and S i, Z r, Bi.

The reason why 0.5 to 3% by weight of at least one of Ge and Ga 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 1% by weight of In. Less than or equal to Si, Zr, Bi.

If at least one of Q e + Ga is less than 0.5% by weight, the oxide cannot exhibit its effect as a lubricant, and In
exceeds 10% by weight, or Si, Zr, Bi.

If at least one of Ge and Ga 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 compositions shown in 1i'l on the left below, the wire diameter was 0.
Make a 7mm brush wire, cut each into 8 lengths, put two of them in parallel, and make one end 10cm wide and 13cm long. A brush contact was made by welding to a base material with a thickness of 0.2 mm and curving 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: 12cm Load: Resistive load Rotation speed: 1000rpm Circumferential speed: 130-120m/min Contact force
: 100g Test time: 7 hours (blank below) As is clear from the table above, the brush contacts of Examples 1 to 5 have significantly less wear than the conventional brush contacts, and the contact resistance is low and stable. I understand that.

This simply means that the sliding contact material of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 5, is
This is because oxides of T, Zr, Bi, Ge, Ga, etc. are generated, and these oxides act as lubricants, improving wear 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 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 70.5-72.5jli amount%, I) t
7.5-9.5% by weight. Ag 3.5-5.5% by weight, Cu 13.5-15
．． 5% by weight. An alloy material consisting of 0.5 to 1.5% by weight of Zn is mixed with 1 to 10% of In and Si without changing the composition ratio. 0.5 to 3 of at least one of Zr, Bi, Ge, and Ga
A sliding contact material made by adding a stopping amount of %. /