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Sliding contact material and manufacturing method thereof

A technology of sliding contact and manufacturing method, applied in the direction of brush manufacturing, conductive materials, conductive materials, etc.

Active Publication Date: 2019-05-03
TANAKA PRECIOUS METAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, the wear particles accumulate in the slits of the commutator, and the commutator short-circuits, causing the motor to stop.

Method used

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  • Sliding contact material and manufacturing method thereof
  • Sliding contact material and manufacturing method thereof
  • Sliding contact material and manufacturing method thereof

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Embodiment Construction

[0042] Embodiments of the present invention will be described below. In the present embodiment, a sliding contact material in which additive elements such as Ni and Sm are added to an Ag—Cu alloy or the like is manufactured and its wear resistance is evaluated. The production of the test material is as follows: high-purity raw materials are mixed so as to achieve a predetermined composition, high-frequency melting is made into a molten metal, the temperature of the molten metal is measured, and the temperature of the molten metal is measured, heated to 1300°C or higher, and then quenched to produce an alloy ingot. The cooling rate at this time was 100°C / min. Then, rolling was performed, and after annealing at 600° C., rolling was performed again, and cutting was performed to obtain test pieces (length: 45 mm, width: 4 mm, thickness: 1 mm).

[0043] In this embodiment, as Examples 1 to 29, sliding contact materials having various compositions were manufactured through the abov...

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Abstract

The present invention is a sliding contact material having a composition of Cu of 6.0% by mass or more and 9.0% by mass or less, Ni of 0.1% by mass or more and 2.0% by mass or less, an additive element M of 0.1% by mass or more and 0.8% by mass or less, and the balance being Ag. The additive element M is at least one element selected from the group consisting of Sm, La and Zr. The present sliding contact material has a material structure in which dispersion particles containing an intermetallic compound containing at least both Ni and an additive element M are dispersed in an Ag alloy matrix. It is required that the ratio of a Ni content (% by mass) and a content of an additive element M (% by mass) (KNi / KM) in the dispersion particles falls within a predetermined range. The present invention is an Ag alloy-based sliding contact material more excellent also in abrasion resistance than conventional ones, and a material adaptable to higher rotation numbers of micromotors.

Description

technical field [0001] The present invention relates to a sliding contact material composed of an Ag alloy. In particular, it relates to a sliding contact material that can be suitably used for a commutator for an electric motor, etc., where the load may increase due to an increase in rotation speed or the like. Background technique [0002] Electric motors are used in a variety of applications such as home appliances and automobiles. In recent years, there has been a demand for higher levels of miniaturization and higher output. According to this tendency, the rotational speed of the electric motor increases, and a motor capable of responding to the increase in the rotational speed and exhibiting a long life is desired. [0003] As an example of the stoppage of the motor due to the lifespan, there is a case where mechanical wear occurs between a commutator and brushes as components thereof. In this phenomenon, the material of the commutator is transferred and attached to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/06C22F1/14H01R39/20H01R43/12C22F1/00
CPCC22C5/08C22F1/14H01B1/026H01R13/03H01R39/20H01R43/12C22C5/06
Inventor 麻田敬雄新妻巧望高桥昌宏鹤田辉政
Owner TANAKA PRECIOUS METAL IND