JPS59110751A - Slide contact material - Google Patents

Abstract

PURPOSE:To develop a slide contact material excellent in anti-wear property, by adding at least one of Sb, Te, Mo, Pb, Se, As and Zn or, further, a ferrous metal to a Pd-Ag-Cu type slide contact material grade alloy having a specific composition. CONSTITUTION:As a slide contact material, especially, a brush contact material, an alloy prepared by adding 0.5-10wt% at least one of Sb, Te, Mo, Pb, Se, As and Zn or, further, 0.01-0.5wt% of a ferrous metal such as Fe, Ni or Co to an alloy having a composition consisting of 30-50wt% Pd, 20-40wt% Ag and 20-40t% Cu without altering the compositional ratio thereof is used. By this method, a brush contact material excellent in anti-wear property and reduced in the generation amount of an abraded powder 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, P d 30 to 50% by weight, Ag2O to 40% by weight, Cu2O to 40% by weight (1
) alloy materials were 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 solve this problem, and uses the above-mentioned alloy material as a base material and adds a small amount of a specific material to it, uses the generated oxide as a lubricant, and improves wear resistance. It is an object of the present invention to provide an improved sliding contact material.

One of the sliding contact materials of the present invention is an alloy material consisting of 30 to 50% by weight of Pd, 40 to 40% by weight of Ag2O, and 40% by weight of Cu2O, without changing the composition ratio.
0.5 to 10% by weight of at least one of b5Te, Mo, Pb+3e, As, and Zn is added.

Another sliding contact material of the present invention is P d 30-5
0% by weight, Ag2O ~ 40% by weight, and Cu2O ~ 40% by weight without changing the composition ratio,
0.5 to 10iHi% of at least one of Sb, Te, Mo, Pb, Se, As, and Zn is added, and 0.01 to 0.5% by weight of Fe group metal is added (2). .

In the sliding contact material of the present invention, Sb is added to an alloy material consisting of 30 to 50% by weight of Pd, 40 to 40% by weight of Ag2O, and 40% by weight of Cu2O without changing the composition ratio.
, Te, Mo, Pb, Se, As, and Zn in an amount of 0.5 to 10% by weight. If it is less than 0.5% by weight, the amount of oxide generated is small and it cannot be effective as a lubricant, and if it exceeds 10% by weight, the amount of oxide generated increases, resulting in high contact resistance. Moreover, it is unstable.

Further, the alloy material includes Sb, Te, Mo, and Pb.

In addition to adding 0.5 to 10% by weight of at least one of 3e, As, and Zn, the reason for adding 0601 to 0.5% by weight of Fe group metal is to refine the crystal grains and further improve wear resistance. If the amount is less than 0.01% by weight, the effect of grain refinement will not appear, and if it exceeds 0.5% by weight, it will be a hindrance to the oxide that acts as a lubricant.

(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, the wire diameter was 0.7fi.
Brush wire rods were made, each cut into lengths of 81 mm, two wires were placed in parallel, one end was welded to a base material with a width of 10 fins, a length of 13 B, and a thickness of 0.2 fins, and a circle of 2R was attached to the other end. A brush contact was made by bending the arc-shaped contact part. 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 (blank below) (4) (d) As is clear from the table above, the brush contacts of Examples 1 to 9 had significantly less wear and contact resistance than the conventional brush contacts. It can be seen that it is 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 9, is
This is because oxides of e, Mo, Pb, Se, As, Zn, etc. are generated, and these oxides act as lubricants, improving wear resistance. Moreover, since the oxide is soft, it is easily removed by the sliding action, so the contact resistance remains unchanged. In particular, the reason that the amount of wear of the brush contacts of Examples 7 to 9 is even smaller than that of the brush contacts of Examples 1 to 6 is that Fe group metal is added to the sliding contact material of the present invention that constitutes the brush wire. The crystal grains are refined and dispersed,
This is nothing short of a further improvement in wear resistance.

As detailed above, according to the sliding contact material according to the present invention,
Compared to conventional sliding contact materials, this material has significantly superior wear resistance, generates extremely little abrasion powder, has low and stable contact resistance, and produces almost no noise (G). effective.

(7) 249-

Claims (1)

[Claims] 1) Pd 30 to 50% by weight, Ag2O to 40% by weight,
Sb, Te, Mo, Pb, Se, A are added to the alloy material consisting of ~40% by weight of Cu2O without changing the composition ratio.
s. A sliding contact material containing 0.5 to 10% by weight of at least one type of Zn. 2) Pd 30-50% by weight, Ag2O-40% by weight,
Sb, Te, Mo, Pb, and Se are added to the alloy material consisting of Cu2O to 40% by weight without changing the composition ratio. A sliding contact material containing 0.5 to 10% by weight of at least one of As and Zn and further 0.01 to 0.5% by weight of Fe group metal.