WO2023238699A1 - タングステン合金線及び金属製品 - Google Patents

タングステン合金線及び金属製品 Download PDF

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Publication number
WO2023238699A1
WO2023238699A1 PCT/JP2023/019619 JP2023019619W WO2023238699A1 WO 2023238699 A1 WO2023238699 A1 WO 2023238699A1 JP 2023019619 W JP2023019619 W JP 2023019619W WO 2023238699 A1 WO2023238699 A1 WO 2023238699A1
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WO
WIPO (PCT)
Prior art keywords
tungsten alloy
alloy wire
tungsten
wire
rhenium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/019619
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
建史郎 武田
雄広 前川
昌紀 笠原
達也 谷脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to DE112023002571.1T priority Critical patent/DE112023002571T5/de
Priority to US18/866,786 priority patent/US20250320584A1/en
Priority to CN202380041118.6A priority patent/CN119213153A/zh
Publication of WO2023238699A1 publication Critical patent/WO2023238699A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/09—Mixtures of metallic powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/12—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of wires
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of pre-alloyed powders or a master alloy
    • 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
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon

Definitions

  • Patent Document 1 discloses a tungsten wire with a tensile strength of 3900 MPa or more.
  • An object of the present invention is to provide a tungsten alloy wire with excellent bending resistance and a metal product equipped with the tungsten alloy wire.
  • the tungsten alloy wire according to one aspect of the present invention is a tungsten alloy wire used in an environment where it is subjected to at least one thermal effect of 1100° C. or higher, and contains rhenium in a content of 5 wt% or more and 26 wt% or less.
  • a metal product according to one embodiment of the present invention includes the tungsten alloy wire according to the above one embodiment.
  • FIG. 1 is a schematic perspective view of a tungsten alloy wire according to an embodiment.
  • FIG. 2A is a schematic perspective view of a rod including a tungsten alloy wire according to an embodiment.
  • FIG. 2B is a schematic perspective view of an electrode including a tungsten alloy wire according to an embodiment.
  • FIG. 2C is a schematic perspective view of a stranded wire including a tungsten alloy wire according to an embodiment.
  • FIG. 3 is a diagram showing the bending resistance of the tungsten alloy wire according to the embodiment after being affected by heat.
  • FIG. 4 is a diagram showing an outline of a coiling test for a tungsten alloy wire according to an embodiment.
  • each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, the scales and the like in each figure do not necessarily match. Further, in each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping explanations will be omitted or simplified.
  • FIG. 1 is a schematic perspective view of a tungsten alloy wire 1 according to the present embodiment.
  • the tungsten alloy wire 1 is wound around a winding frame 2 and stored.
  • the winding frame 2 is sometimes referred to as a bobbin, reel, spool, or drum.
  • the tungsten alloy wire 1 has, for example, a total length on the order of meters (m) of about 100 m to a total length on the order of kilometers (km), but is not particularly limited.
  • the electrode 12 shown in FIG. 2B is an example of a metal product, and includes a tungsten alloy wire 1. Specifically, the electrode 12 is made by processing the tip of the tungsten alloy wire 1 of a predetermined length into a thinner one.
  • the tip shape of the electrode 12 is, for example, a conical shape, but is not limited to this.
  • the shape of the tip of the electrode 12 may be a rounded cone or truncated cone, or a pyramid or truncated pyramid.
  • the electrode 12 is used, for example, in electric discharge machining, but its use is not particularly limited.
  • examples of metal products using the tungsten alloy wire 1 are not limited to those shown in FIGS. 2A to 2C.
  • the metal product may be a saw wire, a mesh, a catheter, a textile product, etc.
  • the metal product may include the tungsten alloy wire 1 and a member formed using a material other than metal (for example, resin).
  • the tungsten alloy wire 1 is resistant to bending even if it is affected by heat of 1100° C. or higher. That is, the tungsten alloy wire 1 has excellent bending resistance. Even if the tungsten alloy wire 1 is bent at a predetermined curvature, no breakage or surface peeling occurs. Note that 1100° C. is an example of the temperature at which tungsten undergoes primary recrystallization.
  • tungsten has the property of being able to withstand high temperatures.
  • tungsten has a problem in that its grain boundaries are weak, that is, cracks tend to form starting from the grain boundaries.
  • the tungsten crystal grains are affected by heat to a degree that changes the size of the crystal grains (specifically, the temperature at which tungsten recrystallizes (1100°C) or higher)
  • the tungsten crystal grains become larger.
  • oxygen also enters the grain boundaries.
  • the number of grain boundaries decreases, the amount of oxygen that enters the grain boundaries also increases, which weakens the strength of tungsten.
  • stress such as bending or bending is applied to tungsten after being affected by heat, cracks tend to form starting from the grain boundaries, resulting in poor bending resistance.
  • the tungsten alloy wire 1 contains tungsten and rhenium (Re), and the tungsten and rhenium are alloyed to form a solid solution.
  • the content of rhenium in the tungsten alloy wire 1 is 5 wt% or more and 26 wt% or less.
  • the rhenium content in the tungsten alloy wire 1 may be 6 wt% or more, 7 wt% or more, 8 wt% or more, 9 wt% or more, or 10 wt% or more. % or more, 12 wt% or more, 15 wt% or more, or 20 wt% or more.
  • the content of rhenium in the tungsten alloy wire 1 may be 25 wt% or less, 20 wt% or less, 15 wt% or less, 12 wt% or less, or 10 wt% or less. % or less, 9 wt% or less, 8 wt% or less, 7 wt% or less, or 6 wt% or less.
  • the rhenium content is 5 wt% or more, the rhenium present in the crystal grains can take in oxygen that enters when it is affected by heat. This makes it possible to reduce the amount of oxygen present in the grain boundaries, making it difficult for cracks to form and suppressing deterioration in bending resistance.
  • the rhenium content is 26 wt% or less, a solid solution of rhenium and tungsten can be formed. If the rhenium content exceeds 26 wt%, a solid solution cannot be formed, and the strength of the tungsten alloy wire 1 may decrease and become brittle.
  • FIG. 3 also illustrates the bending resistance of the tungsten wires according to Comparative Examples 1 to 7.
  • Comparative Examples 1 to 3 are tungsten alloy wires containing rhenium. The content of rhenium in the tungsten alloy wires according to Comparative Examples 1 to 3 is 1 wt% or 3 wt% or less. The wire diameter of the tungsten alloy wires according to Comparative Examples 1 to 3 is 0.10 mm or 0.50 mm.
  • Comparative Examples 4 to 6 are tungsten wires containing potassium (potassium-doped tungsten wires). The potassium content in the potassium-doped tungsten wires according to Comparative Examples 4 to 6 is 0.007 wt%.
  • the inventors of the present application heat-treated the tungsten alloy wires according to Examples 1 to 8, and the tungsten alloy wires, potassium-doped tungsten wires, and pure tungsten wires according to Comparative Examples 1 to 7 at a predetermined temperature. .
  • Five samples were prepared for each example and each comparative example, and each sample was heat treated at different temperatures (1100°C, 1300°C, 1500°C, 1700°C, 2000°C).
  • the heat treatment time has no particular influence, but is, for example, about 1 minute.
  • FIG. 4 is a diagram showing an outline of a coiling test of the tungsten alloy wire 1 according to the present embodiment.
  • the tungsten alloy wire 1 was wound around a rod-shaped core material 20 with a circular cross-sectional shape and a uniform diameter, and it was confirmed whether the tungsten alloy wire 1 would break or the surface would peel off.
  • the diameter R of the cross section of the core material 20 used in the coiling test was made the same as the wire diameter ⁇ of the tungsten alloy wire 1 to be tested. That is, the smaller the wire diameter of the tungsten alloy wire 1 is, the smaller the radius of curvature (larger curvature) is bent (coiling).
  • a cylindrical core material 20 with a wire diameter of 1.00 mm was used.
  • Comparative Examples 1 to 3 when the rhenium content is 1wt% or 3wt%, all cases break except for the case where the rhenium content was affected by heat at 1100°C in Comparative Example 3. Or surface peeling occurred (represented by "NG" in the figure).
  • the wire diameter was 0.10 mm, which was small, so it is assumed that at a low temperature (1100° C.), less oxygen was taken into the grain boundaries and the wire did not break.
  • the metal product according to this embodiment includes a tungsten alloy wire 1.
  • the metal products are rods 11, electrodes 12 or strands 13.
  • the tungsten alloy wire 1 is resistant to bending even if it is affected by heat during manufacturing or use of the metal product. Therefore, deterioration in the quality of metal products can be suppressed.
  • the tungsten alloy wire 1 according to this embodiment can be manufactured, for example, by the following method.
  • tungsten powder and rhenium powder are mixed, press-molded, and sintered to form an ingot.
  • the content of rhenium can be adjusted to 5 wt% or more and 26 wt% or less.
  • tungsten alloy wire 1 having a diameter ranging from 0.02 mm to 1.00 mm as shown in FIG. Note that during wire drawing, heating may be performed at a predetermined temperature. Further, the tungsten alloy wire 1 after drawing may be subjected to surface treatment such as electrolytic polishing.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Metal Extraction Processes (AREA)
  • Conductive Materials (AREA)
PCT/JP2023/019619 2022-06-06 2023-05-26 タングステン合金線及び金属製品 Ceased WO2023238699A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112023002571.1T DE112023002571T5 (de) 2022-06-06 2023-05-26 Wolframlegierungsdraht und metallprodukte
US18/866,786 US20250320584A1 (en) 2022-06-06 2023-05-26 Tungsten alloy wire and metal products
CN202380041118.6A CN119213153A (zh) 2022-06-06 2023-05-26 钨合金线及金属制品

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022091886A JP2023178898A (ja) 2022-06-06 2022-06-06 タングステン合金線及び金属製品
JP2022-091886 2022-06-06

Publications (1)

Publication Number Publication Date
WO2023238699A1 true WO2023238699A1 (ja) 2023-12-14

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PCT/JP2023/019619 Ceased WO2023238699A1 (ja) 2022-06-06 2023-05-26 タングステン合金線及び金属製品

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US (1) US20250320584A1 (https=)
JP (1) JP2023178898A (https=)
CN (1) CN119213153A (https=)
DE (1) DE112023002571T5 (https=)
TW (1) TW202348810A (https=)
WO (1) WO2023238699A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022076997A (ja) * 2020-11-10 2022-05-20 株式会社東芝 タングステンワイヤーロープおよびそれを用いた内視鏡用スネア
WO2022113525A1 (ja) * 2020-11-27 2022-06-02 パナソニックＩｐマネジメント株式会社 金属線
WO2022191026A1 (ja) * 2021-03-09 2022-09-15 株式会社 東芝 レニウムタングステン線棒およびそれを用いた熱電対

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7478983B2 (ja) 2020-06-19 2024-05-08 パナソニックＩｐマネジメント株式会社 タングステン線、ソーワイヤー及びスクリーン印刷用タングステン線

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022076997A (ja) * 2020-11-10 2022-05-20 株式会社東芝 タングステンワイヤーロープおよびそれを用いた内視鏡用スネア
WO2022113525A1 (ja) * 2020-11-27 2022-06-02 パナソニックＩｐマネジメント株式会社 金属線
WO2022191026A1 (ja) * 2021-03-09 2022-09-15 株式会社 東芝 レニウムタングステン線棒およびそれを用いた熱電対

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JP2023178898A (ja) 2023-12-18
TW202348810A (zh) 2023-12-16
DE112023002571T5 (de) 2025-03-20
CN119213153A (zh) 2024-12-27
US20250320584A1 (en) 2025-10-16

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