Electric discharge machining electrode wire and manufacturing method therefor
US-10399167-B2 · Sep 3, 2019 · US
Electric discharge machining electrode wire and manufacturing method therefor
US2017014927A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017014927-A1 |
| Application number | US-201515122081-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 7, 2015 |
| Priority date | Jan 7, 2015 |
| Publication date | Jan 19, 2017 |
| Grant date | — |
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Abstract
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An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an s-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.
First claim
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1 . An electrical discharge machining electrode wire, comprising: a core comprising a copper or a copper alloy; and a covering layer that covers a periphery of the core and comprises a zinc, wherein the covering layer comprises an outermost layer consisting of an ε-phase of a copper-zinc based alloy, and wherein the outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire. 2 . The electrical discharge machining electrode wire according to claim 1 , wherein the covering layer further comprises an inner layer including a y-phase of a copper-zinc based alloy. 3 . The electrical discharge machining electrode wire according to claim 2 , wherein an x-ray diffraction intensity of (0001) of the ε-phase in the covering layer is more than twice an x-ray diffraction intensity of (332) of the γ-phase in the covering layer. 4 . The electrical discharge machining electrode wire according to claim 1 , wherein the core comprises a brass. 5 . A method of manufacturing an electrical discharge machining electrode wire, wherein the electrode wire comprises a core comprising a copper or a copper alloy and a covering layer that covers a periphery of the core and comprises a zinc, the method comprising: plating once the periphery of the core with a zinc or a zinc alloy; drawing the plated core; and after the drawing, conducting a heat treatment under such heat treatment conditions such that the covering layer comprises an outermost layer consisting of an ε-phase of a copper-zinc based alloy and the outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire. 6 . The method of manufacturing an electrical discharge machining electrode wire according to claim 5 , wherein the heat treatment conditions are a heat treatment temperature of 100 to 120° C. and a heat treatment time in a range of 3 to 24 hours.
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- What does patent US2017014927A1 cover?
- An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an s-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu conc…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification B23H7/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jan 19 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).