JPS60224743A - Sliding contact material - Google Patents

Abstract

PURPOSE:To obtain the titled material having improved wear resistance and preventing the production of dust due to wear and the generation of noise by adding specified amounts of Mn and In, Sn, Sb, P, Ti or Zr to an alloy material having a specified composition consisting of Au, Ag and Pd. CONSTITUTION:A sliding contact material having improved wear resistance is obtd. by adding 1-10wt% Mn and 0.5-3wt% at least one among In, Sn, Sb, P, Ti and Zr to an alloy material consisting of 30-50wt% Au, 20-40wt% Ag and 20-40wt% Pd without changing the ratio in the composition so as to increase the hardness of the alloy material by a dispersed intermetallic compound consisting of Mn and at least one among In, Sn, Sb, P, Ti and Zr. The wear resistance can be further improved by substituting an Fe group element for part of said Mn in the range of 0.01-0.5wt% so as to make the grains fine.

Description

[Detailed description of the invention] The present invention relates to improvements in sliding contact materials.

Conventionally, various materials have been considered as sliding contact materials, and in particular, as materials for brush contacts, Au 30 to 50% by weight has been used.
, Ag2O to 40i% and Pd to 20 to 40ffi%.

However, brush contacts made of this alloy material have poor abrasion resistance when sliding with the commutator, and are prone to wear.
This caused 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.

The sliding contact material of the present invention contains 30 to 50% by weight of Au.

Mn is added to an alloy material consisting of 20-40% by weight of A g and 20-40% by weight of I'd without changing the composition ratio.
1 to toffiW% and In, Sn, Sb, P, Ti,
At least one type of Zr is added in an amount of 0.5 to 3%.

Further, in the sliding contact material of the present invention, a part of the Mn is 0.0
)' e group element (1' e
.

Nl, Co) may be substituted.

In the sliding contact material of the present invention, Mn is added to an alloy material consisting of 30 to 50% by weight of Au, 40 to 40% by weight of Ag2O, and 20 to 40% by weight of Pd without changing the composition ratio.
1 to 10% by weight of In, Sn, Sb, P, and Ti.

The reason why 0.5 to 3 [t%] of at least one type of Zr is added is to improve the wear resistance of the alloy material.
This is to disperse and harden intermetallic compounds of n, Sn, Sb, P, i″i, 7.r, and Mn is 1% or I
n, Sn, Sb, P, Ti.

If at least one type of Zr is less than 0.5% by weight, the effect cannot be fully exhibited, and if Mn is less than 10% by weight or In, S
At least 3 species of n, Sb, P, 'I゛i, Zr
If the amount exceeds 1% by weight, the amount of oxides generated will increase, contact resistance will increase, and 1) instability will occur.

In addition, a part of Mn is replaced with Fe in a range of 0.01 to 0.5% by volume.
When substituted with a group element, the crystal grains become finer and the wear resistance is further improved.If it is less than 0.01% by weight, the effect of grain refinement does not appear, and even if it exceeds 0.5% by weight. Beyond that, the second effect cannot be obtained.

Next, using the sliding contact material according to the present invention having the composition shown in the left column of the table below and the conventional sliding contact material, a wire diameter of 0.7 +
+m brush wire rods were made, cut into lengths of 3 mm each, and two wires were placed in parallel, with one end having a width of 1 oa and 11 mm. Sakurasa131. A brush contact was made by joining a base material with a thickness of 0.211 mm and curving a 2R arc-shaped contact portion at the other end.

Then, each brush contact was brought into contact with a disc-shaped commutator made of Ag-Cd1 heavy weight, and the commutator was rotated forward and backward to conduct a sliding test under the following test conditions, and the amount of wear and contact resistance was measured. As a result, the results shown in the right column of the table below were obtained.

Test conditions Current: 0.6A Voltage: 12cm Load: Resistance load Rotation speed: 1000rpm Circumferential speed: 130-120m/min Contact Crab 100g Test time = 7 hours (blank space below) It is clear from the table above It can be seen that the brush contacts of Examples 1 to 8 have significantly less wear than the conventional brush contacts, and have low and stable contact resistance.

This is simply due to the fact that the sliding contact material of the present invention constituting the brush wire of the brush contacts of Examples 1 to 4 contains Mn, In, and Sn.
This is because the dispersion of intermetallic compounds with , Sb, P, "r'i, and Zr results in hardness and improved wear resistance.

In particular, the reason why the amount of wear of the brush contacts of Examples 7 and 8 is even smaller than that of the brush contacts of Examples 1 to 6 is because the F c group metal is added to the sliding contact material of the present invention constituting the brush wire. This is because the crystal grains are finely dispersed and the wear resistance is further improved.

As described below, the sliding contact material according to the present invention has significantly superior wear resistance compared to conventional sliding contact materials, generates extremely little wear powder, and has low contact resistance. This has the effect of providing a stable brush contact with almost no noise generation.

Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1) A u 30-50m1it%, Ag2O-4
An alloy material consisting of 0% heavy weight and 20 to 40% Pd,
Add 1 to 10% Mn and I without changing the composition ratio.
n, 3n. 0.5 of at least one of Sb, P, "I'i, 7.r"
A sliding contact material made by adding ~3% Ichiguchi. 2) The sliding contact material according to claim 1, wherein a part of Mn is substituted with a Pa-e group element (within a range of 0.01 to 0.5 mm%).