GB2529308A - Electrode wire for electric discharge machining and method for manufacturing the electrode wire - Google Patents

Electrode wire for electric discharge machining and method for manufacturing the electrode wire Download PDF

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Publication number
GB2529308A
GB2529308A GB1512164.3A GB201512164A GB2529308A GB 2529308 A GB2529308 A GB 2529308A GB 201512164 A GB201512164 A GB 201512164A GB 2529308 A GB2529308 A GB 2529308A
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phase
alloy
heat treatment
copper
electrode wire
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GB201512164D0 (en
GB2529308B (en
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Kuo-Ta Chang
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YUANG HSIAN METAL IND CORP
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YUANG HSIAN METAL IND CORP
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/08—Wire electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B23H11/006—Electrical contacts or wires
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electrochemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A method for manufacturing an electrode wire 1 includes the steps of: firstly melting and mixing copper with a content of 60% by weight and zinc with a content of 40% by weight to form a copper/zinc binary alloy, and solidifying the copper/zinc binary alloy to form a full beta phase alloy 10. Further steps include galvanizing the full beta phase alloy, processing the full beta phase alloy by a low-temperature heat treatment, and prolonging the treating time of the low-temperature heat treatment to form a surface electric layer. The final step involves heat solidifying the surface electric layer to form a solid alloy layer 11 on the surface of the full beta phase alloy and to let the solid alloy layer form a gamma phase, an epsilon phase or an eta phase at different reaction temperatures. The electrode wire therefore only needs one working procedure. The electrode wire may be specifically for an electric discharge machine (EDM).

Description

ELECTRODE WIRE FOR ELECTRIC DISCHARGE MACHINING AND
METHOD FOR MANTJFACTURING THE ELECTRODE WIRE
The present invention relates to an electrode wire and, more particularly, to an electrode wire for an electric discharge machining (EDM) s process and a method for manufacturing the electrode wire.
A first conventional electrode wire (U.S. Patent No. 8,067,689) in accordance with the prior art shown in FIG. 3 comprises a copper metallic wire 12, a first electroplated layer 1 8 coated on an outer surface of the copper metallic wire 12, and a second electroplated layer 15 coated on an outer surface of the first electroplated layer 18. The first electroplated layer 18 is a brass coating. The second electroplated layer 15 is a zinc coating. The first electroplated layer 18 is a copper/zinc solid solution. In fabrication, the copper metallic wire 12 with an alpha (a) phase is initially galvanized (electroplated by zinc) and then processed by a heat treatment to form the first electroplated layer 18 with a beta (l) phase. Then, the first electroplated layer 1 8 with a beta (J3) phase is initially galvanized (electroplated by zinc) and then processed by a heat treatment to form the second electroplated layer 15 with a gamma (i) phase. Thus, the conventional electrode wire contains the gamma (y) phase by a first electroplating, a first heat treatment, a second electroplating and a second heat treatment. However, the conventional electrode wire needs two electroplating/heat treatment procedures to reach the gamma (y) phase (that is, a+Zn-*13, and 13+Zn->y), thereby complicating the manufacturing process, elongating the working procedure and time, and increasing the cost of fabrication. In addition, the conventional electrode wire needs two electroplating/heat treatment procedures, so that the conventional electrode wire has a greater surface roughness and cannot be cut precisely. Further, when S the conventional electrode wire is cut, the second electroplated layer 15 easily drops powder.
A second conventional electrode wire 3 (U.S. Patent No. 6,447,930) in accordance with the prior art shown in FIGS. 4 and S comprises a core 31 and a sheath layer 32 coated on an outer surface of the core 31. The core 31 is a brass with an alpha (a) phase (a-Ms). The sheath layer 32 is a zinc or zinc alloy with an eta (ii) phase (il-Zn). Thus, the conventional electrode wire 3 contains the gamma (y) phase by a first electroplating, a first heat treatment, a second electroplating and a second heat treatment. However, the conventional electrode wire 3 needs two electroplating/heat treatment procedures to reach the gamma (7) phase (that is, a+Zn-*f3, and 13+Zn-*y), thereby increasing the cost of fabrication. In addition, the second conventional electrode wire 3 needs two electroplating/heat treatment procedures, so that the second conventional electrode wire 3 has a greater surface roughness and cannot be cut precisely.
A third conventional electrode wire 4 (European Patent No. 0733431) in accordance with the prior art shown in FIGS. 6 and 7 comprises a core 41 and a sheath layer 42 coated on an outer surface of the core 41. The core 41 is a brass with an alpha (a) phase (a-Ms). The sheath layer 42 is a zinc or zinc alloy with an eta (ii) phase (il-Zn). Thus, the conventional electrode wire 3 contains the gamma (y) phase by a first electroplating, a first heat treatment, a second electroplating and a second heat treatment. However, the conventional electrode wire 4 needs two electroplating/heat treatment procedures to reach S the gamma ( y) phase (that is, u+Zn-*f3, and 13+Zn-*y), thereby increasing the cost of fabrication. In addition, the third conventional electrode wire 4 needs two electroplating/heat treatment procedures, so that the third conventional electrode wire 4 has a greater surface roughness and cannot be cut precisely.
In accordance with the present invention, there is provided a method for manufacturing an electrode wire, comprising a first step of melting and mixing a copper with a content of 60% by weight and a zinc with a content of 40% by weight to form a copper/zinc binary eutectic which is disposed at a liquid phase, a second step of heat solidifying the copper/zinc binary eutectic to solidify the copper/zinc binary eutectic from the liquid phase into a full beta (fi) phase alloy which is disposed at a solid solution phase, a third step of galvanizing the full beta (f3) phase alloy which functions as a metallic core, a fourth step of processing the metallic core of the full beta (Is) phase alloy by a low-temperature heat treatment to form a coating layer on a surface of the full beta (fi) phase alloy, a fifth step of prolonging a treating time of the low-temperature heat treatment to let the surface of the full beta (l) phase alloy and the coating layer produce a mutual solution to form a surface electric layer, and a sixth step of heat solidifying the surface electric layer to form a solid alloy layer on the surface of the full beta (1) phase alloy and to let the solid alloy layer form a gamma N) phase, an epsilon (a) phase or an eta (ii) phase at different reaction temperatures so as to form an electrode wire including the full beta (fi) phase alloy and the solid alloy layer.
s According to the primary advantage of the present invention, the full beta (f3) phase alloy functions as a metallic core that is directly galvanized and processed by a low-temperature heat treatment whose working time is prolonged to form the electrode wire with the gamma N) phase, the epsilon (a) phase or the eta () phase at different reaction temperatures during different periods of time, so that the electrode wire only needs one working procedure (only a single electroplating/heat treatment process), without needing two working procedures, thereby simplifying the manufacturing process and shortening the working procedure and time, and thereby decreasing the cost of fabrication.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings: FIG. 1 is a cross-sectional view of an electrode wire in accordance with the preferred embodiment of the present invention.
FIG. 2 is an equilibrium phase diagram of copper (Cu) and zinc (Zn) in accordance with the preferred embodiment of the present invention.
FIG. 3 is a cross-sectional view of a first conventional electrode wire
in accordance with the prior art.
FIG. 4 is a cross-sectional view of a second conventional electrode
wire in accordance with the prior art.
s FIG. 5 is a cross-sectional view of the second conventional electrode wire as shown in FIG 4.
FIG. 6 is a front view of a third conventional electrode wire in
accordance with the prior art.
FIG. 7 is a cross-sectional view of the third conventional electrode wire as shown in FIG 6.
Referring to FIGS. 1 and 2, an electrode wire 1 for an electric discharge machining (EDM) process in accordance with the preferred embodiment of the present invention comprises a full beta (1) phase alloy 10, and a solid alloy layer 11 disposed on an outer surface of the frill beta (1) phase alloy 10. The full beta (13) phase alloy 10 functions as a metallic core and includes copper with a content of 60°/o by weight and zinc with a content of 40% by weight. The electrode wire I is a metallic alloy wire.
A method for manufacturing the electrode wire 1 in accordance with the preferred embodiment of the present invention comprises a first step of melting and mixing a copper with a content of 60% by weight and a zinc with a content of 40% by weight to form a copper/zinc binary eutectic which is disposed at a liquid phase, a second step of heat solidifying the copper/zinc binary eutectic to solidify the copper/zinc binary eutectic from the liquid phase into a full beta (l) phase alloy 10 which is disposed at a solid solution phase, a third step of galvanizing the full beta (f3) phase alloy 10 which functions as a metallic core, a fourth step of processing the metallic core of the full beta Q3) s phase alloy 10 by a low-temperature heat treatment to form a coating layer on a surface of the full beta (f3) phase alloy 10, a fifth step of prolonging a treating time of the low-temperature heat treatment to let the surface of the full beta (Is) phase alloy 10 and the coating layer produce a mutual solution to form a surface electric layer, and a sixth step of heat solidifying the surface electric layer to form a solid alloy layer ii on the surface of the full beta (j3) phase alloy and to let the solid alloy layer 11 form a gamma (y) phase, an epsilon (c) phase or an eta (rj) phase at different reaction temperatures so as to form the electrode wire 1 including the frill beta (Is) phase alloy 10 and the solid alloy layer 11.
Tn the first step, the copper of 60% and the zinc of 40% are melted into a liquid phase at a melting temperature of about 909°C. Thus, the copper at a liquid phase and the zinc at a liquid phase are mixed and dissolved mutually to form the full beta (J3) phase alloy 10. In the second step, the copper/zinc binary eutectic of the full beta (Is) phase alloy 10 is directly heat solidified at a melting point in the range of 903°C to 900°C (see FIG 2). Tn the fourth step, the low-temperature heat treatment has a reaction temperature that is controlled to be lower than 250°C (see FIG. 2). Thus, the electrode wire 1 made by the method of the present invention has a smaller surface roughness, can be cut rapidly, will not drop powder and has a better adhesive force.
As shown in FIG. 2, an equilibrium phase diagram of copper (Cu) and zinc (Zn) is shown, wherein the vertical axis indicates the temperature (°C), S the upper horizontal axis indicates the weight content of the copper (C u), and the upper horizontal axis indicates the weight content of the zinc (Zn). When the content of the copper is 60% and the content of the zinc is 40%, the copper/zinc binary eutectic is heat solidified to form the full beta (Is) phase alloy 10. In the low-temperature (about 250°C) heat treatment of the full beta (f3) phase alloy 10, the full beta (Is) phase alloy 10 of the copper/zinc binary eutectic is disposed at an equilibrium phase to let the solid alloy layer 11 form the gamma (y) phase, the epsilon () phase or the eta (ii) phase at the different reaction temperatures during different periods of time.
When the reaction temperature of the low-temperature heat treatment S of the full beta (fi) phase alloy 10 is controlled to be under 835°C (see FTG. 2), the solid alloy layer 11 forms the gamma (-y) phase. When the reaction temperature of the low-temperature heat treatment of the full beta (I) phase alloy 10 is controlled to be under 600°C (see FIG. 2), the solid alloy layer 11 forms the epsilon (a) phase. When the reaction temperature of the low-temperature heat treatment of the full beta (Is) phase alloy 10 is controlled to be under 420°C (see FIG 2), the solid alloy layer 11 forms the eta (ii) phase.
The electrode wire I in accordance with the preferred embodiment of the present invention has a workpiece Surface Roughness (Ra) that is described in the following table.
Phase. Surface Roughness, CUTTING SPEED y (Eta) Ra <0,10, >20% higher than 60/40 Brass Wire (Epsilon) Ra<0,05, y (Gamma) Ra<O.05 (surface better than e Phase) V/hen the reaction temperature of the low-temperature heat treatment o of the full beta (J3) phase alloy 10 (in the phase of f3+y) is controlled optimally in the range of 500°C to 400°C, the electrode wire 1 with the gamma (y) phase is indicated by a copper/zinc alloy material 1 a (see FIG. 2) which has a surface roughness smaller than 0.05 (lRa<0.05), which belongs to a precise rapid cutting. When the reaction temperature of the low-temperature heat treatment s of the full beta (Is) phase alloy 10 (in the phase of f3+y) is controlled optimally at 400°C, the electrode wire 1 with the epsilon (a) phase is indicated by a copper/zinc alloy material lb (see FIG. 2) which has a surface roughness smaller than 0.05 (Ra<0.05), which belongs to a common precise cutting.
When the reaction temperature of the low-temperature heat treatment of the full beta (J3) phase alloy 10 (in the phase of 3+y) is controlled optimally at 250°C, the electrode wire 1 with the eta () phase is indicated by a copper/zinc
S
alloy material ic (see FIG 2) which has a surface roughness smaller than 0.10 (Ra<0. 10), which belongs to a precise rapid cutting without dropping powder.
Accordingly, the full beta (J3) phase alloy 1 0 ftmnctions as a metallic core that is directly galvanized and processed by a low-temperature heat S treatment whose working time is prolonged to form the electrode wire 1 with the gamma (y) phase, the epsilon (a) phase or the eta (ii) phase at different reaction temperatures during different periods of time, so that the electrode wire 1 only needs one working procedure (only a single electroplating/heat treatment process), without needing two working procedures, thereby simplifying the manufacturing process and shortening the working procedure and time, and thereby decreasing the cost of fabrication. In addition, the electrode wire 1 does not need a secondary working procedure to apply an electroplated layer on the outer surface thereof, so that the electrode wire 1 has a smaller surface rouglmess, can be cut rapidly and precisely, will not drop S powder and has a better adhesive force.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that tile appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims (8)

  1. CLAIMS1. A method for manufacturing an electrode wire, comprising: a first step of melting and mixing a copper with a content of 60% by weight and a zinc with a content of 40% by weight to form a copper/zinc s binary eutectic which is disposed at a liquid phase; a second step of heat solidifying the copper/zinc binary eutectic to solidify the copper/zinc binary eutectic from tile liquid phase into a full beta (I) phase alloy which is disposed at a solid solution phase; a third step of galvanizing the full beta (fi) phase alloy which functions as a metallic core; a fourth step of processing the metallic core of the full beta (l) phase alloy by a low-temperature heat treatment to form a coating layer on a surface of the full beta (1) phase alloy; a fifth step of prolonging a treating time of the low-temperature heat treatment to let the surface of the full beta (fi) phase alloy and the coating layer produce a mutual solution to form a surface electric layer; and a sixth step of heat so1idif'ing the surface electric layer to form a solid alloy layer on the surface of the full beta (li) phase alloy and to let the solid alloy layer form a gamma (y) phase, an epsilon (a) phase or an eta (ii) phase at different reaction temperatures so as to form an electrode wire including the full beta (f3) phase alloy and the solid alloy layer.
  2. 2. The method of claim 1, wherein in the low-temperature heat treatment of the full beta (l) phase alloy, the full beta (fi) phase alloy of the copper/zinc binary eutectic is disposed at an equilibrium phase to let the solid ahoy layer form the gamma (y) phase, the epsilon (c) phase or the eta (11) phase S at the different reaction temperatures during different periods of time.
  3. 3. The method of claim 1, wherein in the second step, the copper/zinc binary eutectic of the full beta (fi) phase alloy is directly heat solidified at a melting point in the range of 903°C to 900°C.
  4. 4. The method of claim 1, wherein in the fourth step, the low-temperature heat treatment has a reaction temperature that is controlled to be lower than 250°C.
  5. S. The method of claim 1, wherein: when the reaction temperature of the low-temperature heat treatment of the full beta (f3) phase alloy is controlled to be under 835°C, the solid alloy layer forms the gamma (y) phase; when the reaction temperature of the low-temperature heat treatment of the full beta (I) phase alloy is controlled to be under 600°C, the solid alloy layer forms the epsilon (a) phase; and when the reaction temperature of the low-temperature heat treatment of the full beta (f3) phase alloy is controlled to be under 420°C, the solid alloy layer forms the eta () phase.
  6. 6. The method of claim 1, wherein:IIwhen the reaction temperature of the low-temperature heat treatment is controlled in the range of 500°C to 400°C, the full beta (f3) phase alloy (in the phase of J3+y) directly forms a copper/zinc alloy material of the electrode wire of the gamma (y) phase, which has a surface roughness smaller than 0.05 S (Ra<0.05); when the reaction temperature of the low-temperature heat treatment is controlled in the range of 400°C, the full beta (fi) phase alloy (in the phase of f3+y) directly forms a copper/zinc alloy material of the electrode wire of the epsilon (c) phase, which has a surface roughness smaller than 0.05 (Ra<0.05); and when the reaction temperature of the low-temperature heat treatment is controlled in the range of 250°C, the full beta (f3) phase alloy (in the phase of fi+y) directly forms a copper/zinc alloy material of the electrode wire of the eta (i) phase, which has a surface roughness smaller than 0.10 (Ra<O.10).
  7. 7. A method for manufacturing an electrode wire substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
  8. 8. An electrode wire made by the method claimed in any one of the preceding claims.Amendments to the claims have been filed as followsCLAIMS1. A method for manufacturing an electrode wire, comprising: a first step of melting a mixture of 60% by weight copper and 40% by weight zinc to form a copper/zinc binary eutectic which is disposed at a liquid phase; a second step of heat solidifying the copper/zinc binary eutectic to solidify the copper/zinc binary eutectic from the liquid phase into a full beta (Ii) phase alloy which is disposed at a solid solution phase; a third step of galvanizing the full beta (l) phase alloy which functions as a metallic core; a fourth step of processing the metallic core of the full beta () phase alloy by a low-temperature heat treatment to form a coating layer on a surface of the full beta (Ii) phase alloy; 3. : a fifth step of prolonging the treating time of the low-temperature * a. *e* is heat treatment to let the surface of the full beta ((3) phase alloy and the coating S. * layer produce a mutual solution to form a surface electric layer; and *5Se55 * * a sixth step of heat solidifying the surface electric layer to form a a. solid alloy layer on the surface of the full beta (f3) phase alloy and to let the solid alloy layer form a gamma (y) phase, an epsilon (a) phase or an eta (i) phase at the relevant temperatures so as to form an electrode wire including the full beta (Is) phase alloy and the solid alloy layer.2. The method of claim 1, wherein in the low-temperature heat treatment of the frill beta (f3) phase ahoy, the full beta (f3) phase alloy of the copper/zinc binary eutectic is disposed at an equilibrium phase to let the solid alloy layer form the gamma (y) phase, the epsilon (c) phase or the eta (i) phase at the different reaction temperatures during different periods of time.3. The method of claim 1, wherein in the second step, the copper/zinc binary eutectic of the full beta (1) phase alloy is directly heat solidified at a melting point in the range of 903°C to 900°C.4. The method of claim I, wherein in the fourth step, the low-temperature heat treatment has a reaction temperature that is controlled to be lower than 25 0°C.5. The method of claim 1, wherein: when the reaction temperature of the low-temperature heat treatment i. : of the full beta () phase alloy is controlled to be under 835°C, the solid alloy * fln * 15 layer forms the gamma (y) phase; ** * when the reaction temperature of the low-temperature heat treatment * . of the full beta (J3) phase alloy is controlled to be under 600°C, the solid alloy layer forms the epsilon (a) phase; and when the reaction temperature of the low-temperature heat treatment of the full beta () phase alloy is controlled to be under 420°C, the solid alloy layer forms the eta () phase.6. The method of claim 1, wherein: when the reaction temperature of the low-temperature heat treatment is controlled in the range of 500°C to 400°C, the 11th beta (j3) phase alloy (in thc phase of ±y) directly forms a copper/zinc alloy material of the electrode wire of the gamma (y) phase, which has a surface roughness less than 0.05 (Ra<0.05); when the reaction temperature of the low-temperature heat treatment is controlled in the range of 400°C, the full beta (Is) phase alloy (in the phase of frl-y) directly forms a copper/zinc alloy material of the electrode wire of the epsilon (a) phase, which has a surface roughness less than 0.05 (Ra<0.05); and when the reaction temperature of the low-temperature heat treatment is controlled in the range of 250°C, the full beta (J3) phase alloy (in the phase of J3±y) directly forms a copper/zinc alloy material of the electrode wire of the eta (ri) phase, which has a surface roughness less than 0.10 (Ra<0.l0).7. A method for manufacturing an electrode wire substantially as * 15 hereinbefore described with reference to Figures 1 and 2 of the accompanying S. * drawings.* . SI.. * I **. * a. *. .S * S.
GB1512164.3A 2015-07-13 2015-07-13 Electrode wire for electric discharge machining and method for manufacturing the electrode wire Expired - Fee Related GB2529308B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61136733A (en) * 1984-12-08 1986-06-24 Fujikura Ltd Electrode wire for wire-cut spark erosion work and preparation thereof
US4686153A (en) * 1984-12-08 1987-08-11 Fujikura Ltd. Electrode wire for use in electric discharge machining and process for preparing same
US20070295695A1 (en) * 2006-06-23 2007-12-27 Dandridge Tomalin EDM wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61136733A (en) * 1984-12-08 1986-06-24 Fujikura Ltd Electrode wire for wire-cut spark erosion work and preparation thereof
US4686153A (en) * 1984-12-08 1987-08-11 Fujikura Ltd. Electrode wire for use in electric discharge machining and process for preparing same
US20070295695A1 (en) * 2006-06-23 2007-12-27 Dandridge Tomalin EDM wire

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GB2529308B (en) 2017-09-13

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