JPS59100244A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material using produced oxide as a lubricant and having improved wear resistance by adding one or more among Sb, Te, Mo, Pb, Se, As and Zn to an Au alloy material contg. a prescribed percentage each of Ag and Cu. CONSTITUTION:A sliding contact material is obtd. by adding 0.5-10wt% one or more among Sb, Te, Mo, Pb, Se, As and Zn to an Au alloy material consisting of, by weight, 61.5-63.5% Au, 6.5-8.5% Ag and 29-31% Cu. The sliding contact material gives a brush contact which is much superior to a brush contact made of a conventional sliding contact material in wear resistance, produces a very small amount of powder owing to wear, has lower and more stable contact resistance, and generates hardly noise. By adding 0.01-0.5wt% Fe group metal in addition to said metals, the grains of the contact material are made fine, and a sliding contact material with further improved wear resistance 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 in particular, Au61.5-63.
5% by weight, Ag6.5-8.5% by weight, Cu29-31
Alloy material amounts consisting of weight percent were widely used.

However, brush contacts made of this alloy material have poor friction resistance when sliding with the commutator, and are likely to generate friction powder, causing noise.

The present invention has been made to eliminate such drawbacks,
The present invention aims to provide a sliding contact material with improved wear resistance by adding a small amount of a specific material to the alloy material as a base material and using the generated oxide as a lubricant.

One of the sliding contact materials of the present invention is Au61.5-63.
5% by weight, Ag6.5-8.5% by weight, Cu29-31
% by weight of at least one of Sb, Te, Mo, Pb, Se, As, and Zn without changing the composition ratio.

One of the sliding contact materials of the present invention is Au61.5-63.
5% by weight, Ag6.5-8.5% by weight, Cu29-31
% by weight, at least one of Sb, Te, Mo, Pb, Se, As, and Zn is added in an amount of 0.5 to 10% by weight without changing the composition ratio, and Fe
It is made by adding 0.01 to 0.5% by weight of group metal.

One of the sliding contact materials of the present invention is Au61.5-63.
5% by weight, Ag6.5-8.5% by weight, Cu29-31
The reason why 0.5 to 10% by weight of at least one of Sb, Te, Mo, Pb, Se, As, and Zn is added to the alloy material consisting of This is to generate an appropriate amount of oxide that becomes a lubricant in order to improve the friction resistance of the alloy material, and if it is less than 0.5% by weight, the amount of oxide generated is too small to be effective as a lubricant. If it exceeds % by weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become unstable.

Further, the alloy material may include Sb, Te, Mo, Pb, Se,
The reason for adding 0.5 to 10% by weight of at least one of As and Zn and further adding 0.01 to 0.5% by weight of Fe group metal is to make the crystal grains finer and further improve the friction resistance. If it 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.

Next, using the sliding contact material according to the present invention and the conventional sliding contact material having the component plasticity shown in the left column below, the inner diameter was 0.7 mm.
Brush wire rods were made, each cut into 8 mm lengths, and 2
1 parallel, one end 10mm wide, 13mm long, 0 thick
．． A brush contact was made by welding to a 2 mm base material and bending a 2R arc-shaped contact part at the other end. Then, each brush contact was brought into contact with a disc-shaped commutator, and the commutator was rotated in forward and reverse directions to conduct a sliding test under the following test conditions, and the amount of friction and contact resistance were measured. We obtained the results shown in the figure.

Test conditions Current: 0.6 A Voltage: 12 V Load: Resistance load Rotation speed: 1000 rpm Peripheral speed: 130-120 m/min Contact force: 100 g Test time: 7 hours As is clear from the table above, the brushes of Examples 1 to 9 It can be seen that the contact has significantly less wear than the conventional brush contact, and the contact resistance 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 sliding action, so the contact resistance remains unchanged. In particular, the brush contacts of Examples 7 to 9 are similar to those of Example 1.
The reason why the wear resistance is even lower than that of the brush contacts of 6 to 6 is that the sliding contact material of the present invention, which constitutes the brush wire, has F
This is because the addition of Group E metals makes the crystal grains finer and more dispersed, further improving wear resistance.

Claims (1)

[Claims] 1) Au61.5-63.5% by weight, Ag6.5-8.
5% by weight of Cu, 29-31% by weight of Sb, Tc, Mo, and Pc without changing the composition ratio.
, Se, As, and Zn in an amount of 0.5 to 10% by weight. 2) Au61.5-63.5% by weight, Ag6.5-8.
An alloy material consisting of 5% by weight and 29 to 31% by weight of Cu,
Sb, Tc, Mo, Pb, without changing the composition ratio.
Addition of 0.5 to 10% by weight of at least one of Se, As, and Zn, and further 0.01 to 0.5% of Fe group metal
Sliding contact material made of additives.