JPS59107042A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain a sliding contact material having superior wear resistance and contact resistance characteristics by adding Si and Zr 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 0.5-5wt% in total of Si and Zr 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 superior hardness and wear resistance is obtd. The contact produces a very 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 low hardness, which tends to cause adhesion and generate abrasion powder during sliding contact with the commutator. It became.

The present invention has been made in order to eliminate such drawbacks, and uses the above-mentioned alloy material as a base material and slightly adds a specific material to it to increase hardness and improve compatibility and contact resistance characteristics. The present invention aims to provide a sliding contact material with improved properties.

One of the fM dynamic contact materials of the present invention has an A u 61.5
~63.5% by weight, Ag 6.5~8.5% by weight, Cu29~31% by weight, without changing the composition ratio, Si and Zr are added to a total of 0.5%. It is made by adding ~5% by weight.

Another sliding contact material of the present invention is All 61.
5-63.5% by weight, A g 6.5-8.5 Tf
i A total of 0 Si and Zr is added to an alloy material consisting of Ff% and Cu29 to 31% by weight without changing the composition ratio.
．． 5 to 5% by weight is added, and further Fe group metal is added from 0.01 to 5% by weight.
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? 311m% of Si and 7.3m% without changing the composition ratio. r in total from 0.5 to
The reason for adding 5% by weight is to increase the hardness of the alloy material in order to improve its wear resistance.If it is less than 0.5% by weight, the effect cannot be achieved, and if it exceeds 5% by weight, oxides will form. This results in an increase in the amount of contact generated, a high contact resistance, and furthermore, instability.

Further, in addition to adding a total of 0.5 to 5% by weight of Si and Zr to the alloy material, 0.01 to 0.0% of a P6 group metal is added.
The reason for adding 5% by weight is to refine the crystal grains and further improve wear resistance.If it is less than 0.0% by weight, the effect of grain refinement will not appear, and if it exceeds 0.5% by weight, it will not be effective. This is because the above effects cannot 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 (with wire diameters of 0 and 7, respectively),
+*s brush wire rods were made, cut into lengths of 81 m each, and made into double rows so that one end had a width of ioam, a length of 13*n,
A brush contact was made by welding to a base material with a thickness of 0.21 mm and bending a 2 R arc-shaped contact portion at the other end. Then, each brush contact was brought into contact with an arc-shaped commutator, the commutator was rotated forward and backward, and a li4 dynamic test was conducted under the following test conditions, and the amount of wear and contact resistance were measured. The same results were obtained.

Test conditions Current: 0.6A Voltage: 12■ Load/Resistance load Rotation speed: 11000 rp Peripheral speed: 13 (1 to 120 m/m
In-contact crab 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. It can be seen that

This is 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 5, has increased hardness by adding Sl and Zr and does not adhere during sliding, so that the wear resistance is improved. This is because the contact resistance characteristics are improved. In particular, the reason why the amount of wear of the brush contacts of Examples 1 to 3 is even smaller than that of the brush contacts of Example 4.5 is that the sliding contact material of the present invention constituting the brush wire abrasions contains Fe group metal JjE. When added, the crystal grains become finer and become smaller.
This is because the wear resistance is further improved.

As detailed above, the sliding contact material according to the present invention has the following features:
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.

Claims (1)

[Claims] 1) A u 61.5-63.5% by weight, A g
Si and Zr 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 made by adding 0.5 to 5% by weight of the following in total. 2) A u 61.5-63.5% by weight, A g
To an alloy material consisting of 6.5 to 8.5 fflffl% and 29 to 31% by weight of Cu, a total of 0.5 to 5% by weight of Si and Zr is added without changing the composition ratio, and further F
A sliding contact material containing 0.01 to 0.5% by weight of Group E metal.