JPS59107043A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material having a high softening temp. and superior welding resistance by adding at least one among W, V and Ta to an Au-Ag-Cu alloy having a specified composition for a sliding contact material or by further adding an Fe group metal. CONSTITUTION:An alloy material obtd. by adding 0.5-10wt% at least one among W, V and Ta to an alloy material having a composition consisting of 61.5-63.5wt% Au, 6.5-8.5wt% Ag and 29-31wt% Cu without changing the ratio in the composition is used as a sliding contact material, especially a brush contact material. To the alloy material may be further added 0.01-0.5wt% Fe group metal such as Fe, Ni or Co. A brush contact having a high softening temp., superior welding resistance and wear resistance is obtd. The contact produces a small amount of powder owing to wear.

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 61.5-6
3.5% by weight, A g 6.5-8.5% by weight, Cu
Alloy materials consisting of 29-31% by weight were widely used.

However, brush contacts made of this alloy material have a low softening temperature and tend to adhere to abrasion powder when sliding with a commutator, resulting in unstable contact resistance and noise generation.

The present invention has been made in order to eliminate such drawbacks, and provides a slide that uses the above-mentioned alloy material as a base material and slightly adds a specific material to the material to increase the softening temperature and improve the adhesion resistance. The purpose is to provide a moving contact material.

One of the sliding contact materials of the present invention has an A u of 61.5 to 6
3.5% by weight, A g 6.5-8.5% by weight,
At least one of W, V, and Ta is added to an alloy material consisting of 29 to 31% by weight of Cu without changing its composition ratio.
It is made by adding 5 to 10% by weight.

Another sliding contact material of the present invention has A u 61.5
~63.5% by weight, Ag 6.5~8.5% weight u29~31% by weight, without changing the composition ratio, we can add small amounts of W, V, and Ta (both 0 for one type
．． Added 5 to 10% by weight, and further added 0.01% Fe group metal.
It is made by adding ~0.5% by weight.

In the sliding contact material of the present invention, A u 61.5 to 6
3.5% by weight, A g 6.5-8.5% by weight,
Cu 29-31! The reason why 0.5 to 10% by weight of at least one of W, V, and Ta is added to the alloy material consisting of 1.5% by weight without changing the composition ratio is to improve the adhesion resistance of the alloy material. This is to increase the softening temperature to improve
The effect cannot be exhibited at less than 0.5% by weight, and 10% by weight
If it exceeds this, the amount of oxides generated will increase, the contact resistance will increase, and furthermore, it will become unstable.

Further, in addition to adding 0.5 to 10% by weight of at least one of W, V, and Ta to the alloy material, 0.5 to 10% by weight of Fe group metal is further added.
．． The reason for adding 0.01 to 0.5% by weight 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, and 0.5% by weight is added. This is because even if the amount is exceeded, 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 composition shown in the left column below, each wire diameter was 0.1**.
Brush wire rods were made, cut into 8 fins each, two fins were placed in parallel, one end was welded to a base material with a width of 10 fins, a length of 13 N, and a thickness of 0.2 fins, and the other end was welded with 2 R fins. 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: 12■ Load: Resistive load Rotation speed: 1000 rpm Peripheral speed
: 130-120 m/min contact cuff
100g Test time = 7 hours (blank below) As is clear from the table above, the brush contacts of Examples 1 to 5 had significantly less wear than the conventional brush contacts, and the contact resistance was low and stable. I understand.

This is because the sliding contact material of the present invention constituting the brush wire of the brush contacts of Examples 1 to 5 is W.

The addition of at least one of V and Ta increases the softening temperature, prevents adhesion during sliding, and improves wear resistance and contact resistance characteristics. In particular, the reason why the amount of wear of the brush contacts of Example 4.5 is even smaller than that of the brush contacts of Examples 1 to 3 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 Metal Metal Industry Co., Ltd.

Claims (1)

[Claims] 1) A u 61.5-63.5% by weight, A g
W, V, and T are added to the alloy material consisting of 6.5 to 8.5 weight% weight u29 to 31 weight% without changing the composition ratio.
A sliding contact material containing 0.5 to 10% by weight of at least one of the following. 2) A u 61.5-63.5% by weight, A g
W and V are added to an alloy material consisting of 6.5 to 8.5% by weight and 29 to 31% by weight of Cu without changing the composition ratio.
A sliding contact material comprising 0.5 to 10% by weight of at least one of Ta, and further 0.01 to 0.5% by weight of Fe group metal.