JPS605841A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material having superior wear resistance by adding specified elements to an Au-Pt-Pd-Ag alloy without changing the ratio in the composition. CONSTITUTION:To an alloy material for a sliding contact having a composition consisting of, by weight, 19-21% Au, 4-6% Pt, 44-46% Pd and 29-31% Ag are added 1-10wt% Sb and 0.5-3wt% at least one among Bi, Si, Ge and Ga without changing the ratio in the composition. By adding the elements, the hardness of the alloy is increased, so the resistance of the alloy to wear during sliding along a commutator is improved. When 0.01-0.5wt% Fe group metal such as Ni is substituted for part of Sb, the grains of the alloy are made fine to further improve the wear resistance.

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 feed, and in particular, materials for brush contacts include Au 19-21% by weight, I) 14-6% by weight, Pd 44-46% by weight, A
g2! 1] to 31% by weight were widely used.

However, in a brush contact made of this alloy +>+ material,
The abrasion resistance during sliding with the commutator was poor, and abrasion particles were likely to be generated, causing noise.

The present invention has been made in order to eliminate such drawbacks, and provides a sliding contact material with improved wear resistance by making use of the alloy material and adding a slight amount of a specific element to it. This is what I am trying to do.

The sliding contact material of the present invention has an Au of 19 to 21% by weight.

Pt4-6% by weight, Pd44-46% by weight, Ag29-
Without changing the composition ratio of the alloy material consisting of 31% by weight, sb was added to 331% by weight of 1 to 1O and Si, 13i, 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, Au19 to 21% by weight
l) j 4-6% by weight, Pd44-46% by weight, A
1 to 10% by weight of sb, Si, and Bi without changing the composition ratio to an alloy material consisting of 29 to 31% by weight of g.

The reason why at least one of Ge and Ga is added by 0.5 to 3% by weight is to improve the wear resistance of the alloy material (to make it hard, and sb is less than 0.5% by weight; 1@ or Si
If at least one of Bi, Ge, and Ga is less than 0.5% by weight, the effect cannot be exhibited, and if sb exceeds 10% by weight or at least one of Si, Bi, Ge, and Ga exceeds 3% by weight, oxidation occurs. (Production of the product) The number of i-cages increases, the contact resistance increases, and furthermore, it becomes unstable.

In addition, a part of the sb is 0.01 to 0.5% by weight of Fe.
The reason for replacing it with a group metal is to refine the crystal grains and further improve wear resistance.If it is less than 0.01% by weight, the effect of grain refinement will not appear, but if it exceeds 0.5% by weight, the effect of grain refinement will not appear. However, no further effect can be obtained.

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, the wire diameter was 0.711 mm.
Make a brush wire of I11, cut it into 8 lengths each, and put two of them in parallel -)jjJori'! li10mm,
A brush contact was made by welding to a base material with a length of 131 m and a thickness of 0.2 m11, and a 2R arc-shaped contact part was bent 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: Resistance load Rotation speed: 1000rpm Circumferential speed: 13o~120, m7min Contact crab 100g Test time: 7 hours (blank below) In the table above As is clear, the brush contacts of Examples 1 to 5 have significantly less wear than the conventional brush contacts, and the contact resistance is equally low and stable. This is because the sliding contact material of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 5, becomes hard due to the addition of sb and at least one of St, Bi, Ge, and Ga, and has improved wear resistance. It's all about improving. In particular, the reason why the amount of wear of the brush contact of Example 5 is even smaller than that of the brush contacts of Examples 1 to 4 is that Fe group metal is added to the sliding contact material of the present invention that constitutes the brush wire. , the crystal grains become finer and the minute 1131. This is due to the fact that it is made of steel and its wear resistance is further improved.

As detailed above, according to the sliding contact material according to the present invention,
A brush that has significantly better wear resistance than 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. This has the effect of providing points of contact.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) Au 19-21% by weight, Pt 4-6 tonne%
, 1) Adding 1 sb to an alloy material consisting of 44-46% by weight of d and 29-31% by weight of Ag without changing the composition ratio.
~10% by weight and a small amount of Si, Bi, Ge, and Ga (0.5 to 3% by weight of one kind). 2) Part of the above sb is added to 0.01 to 0.5% by weight. 1% F”
2. The sliding contact material according to claim 1, wherein the sliding contact material is replaced with an e-group metal.