JPS59229442A - Sliding contact material - Google Patents

Abstract

PURPOSE:To improve the wear resistance of a conventional sliding contact material consisting of Pd and Ru by adding specified amounts of Zn and one or more among Si, Zr, Bi, Ge and Ga to the contact material. CONSTITUTION:An alloy material having a composition consisting of, by weight, 87-93% Pd and 7-13% Ru has been widely used up to now as a sliding contact material, especially as a material for a brush contact. A brush contact of the alloy material shows, however, inferior wear resistance during sliding along a commutator and causes the generation of noise. In order to improve the wear resistance, 1-10% Zn and 0.5-3% one or more among Si, Zr, Bi, Ge and Ga are added to the alloy material without changing the ratio in the composition. 0.01-0.5% Fe group metal may be further added.

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.

In particular, as a material for brush contacts, Pd87-9
An alloy material (1) consisting of 3% by weight of Ru and 7-13% by weight of Ru 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 to eliminate such drawbacks, and provides a sliding contact material with improved wear resistance by using the above-mentioned alloy material as a base material and adding a small amount of a specific material thereto. That is.

One of the sliding contact materials of the present invention is an alloy material consisting of 87 to 93% by weight of P d and 7 to 13% by weight of Ru, and 1 to 10% by weight of Zn and 1 to 10% of St without changing the composition ratio. ,
0.5 to 3 of at least one of Zr, Bi, Ge, and Ga
It is made by adding % by weight.

Another sliding contact material of the present invention is P d 87-9
3% by weight of Zn and 7-13% by weight of Ru without changing the composition ratio.
0.5 of at least one of t, Zr, Bi, Ge, and Ga
-3% by weight is added, and further Fe group metal is added in an amount of o, oi to 0.
It is made by adding 5% by weight.

In the sliding contact material of the present invention, 1 to 10% by weight of Zn is added to an alloy material consisting of 87 to 93% by weight (2) of P d and 7 to 13% by weight of Ru without changing the composition ratio. % and Si,
0.5 to 3 of at least one of Zr, Bi, Ge, and Ga
The reason why % by weight is added is to make the alloy material hard to improve its wear resistance, and Zn is less than 1% by weight, or St, Zr, Bi, Ge.

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

Further, 1 to 10% by weight of Zn and St are added to the alloy material.

At least one of Zr, +3i, Ge, and Ga from 0.5 to
In addition to adding 3% by weight, Fe group metal was added from 0.01 to 0.
．． The reason for adding 5% by weight is to refine the crystal grains and further improve the wear resistance.If it is less than 0.01% by weight, the effect of grain refinement will not appear, and even if it exceeds 0.5% by weight. No further effect can be obtained.

(3) □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, wire diameters of 0 and 1* were obtained, respectively.
va brush wire material, cut each into 8 ml lengths, put two wires in parallel, and cut one end into width 1 (1+n, length 13 mm,
A brush contact was made by welding to a composite material with a thickness of 0.2 mm and 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: 12V Load: Resistive load Rotation speed: 1000 rpm Peripheral speed
; 130-120 m/min contact crab 1
00g Test time: 7 hours (4) (k5) As is clear from the table above, the brush contacts of Examples 1 to 6 had significantly less wear than the conventional brush contacts, and the contact resistance was low and stable. I know that there is.

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 6 contains Zn, St, and Zr.
This is because the addition of at least one of , Bi, Ge, and Ga increases hardness and improves wear resistance. In particular, the reason why the amount of wear of the brush contact of Example 6 is even smaller than that of the brush contacts of Examples 1 to 5 is that Fe group metal is added to the sliding contact material of the present invention constituting the brush wire. This is because the crystal grains have become finer and more dispersed, further improving wear resistance.

As detailed above, according to the sliding contact material according to the present invention,
Compared to conventional sliding contact materials, it has significantly superior wear resistance, generates extremely little abrasion powder, and has the effect of providing a brush contact with low and stable contact resistance and almost no noise. .

Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. (6)

Claims (1)

[Claims] 1) Adding 1 to 10% of Zn to an alloy material consisting of 87 to 93% by weight of Pd and 7 to 13% by weight of Ru without changing the composition ratio.
A sliding contact material comprising 10% by weight and 0.5 to 3% by weight of at least one of Si, Zr, Bi, Ge, and G'a. 2) Adding 1 to 10% of Zn to an alloy material consisting of 87 to 93% by weight of Pd and 7 to 13% by weight of Ru without changing the composition ratio.
A sliding contact material comprising: 10% by weight, 0.5 to 3% by weight of at least one of Si, Zr, Bi, Ge, and Ga, and 0.01 to 0.5% by weight of Fe group metal.