EP0297001B1 - Verfahren zum Vermindern der Streuung der charakteristischen mechanischen Werte bei Wolfram-Nickel-Eisen-Legierungen - Google Patents

Verfahren zum Vermindern der Streuung der charakteristischen mechanischen Werte bei Wolfram-Nickel-Eisen-Legierungen Download PDF

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Publication number
EP0297001B1
EP0297001B1 EP88420211A EP88420211A EP0297001B1 EP 0297001 B1 EP0297001 B1 EP 0297001B1 EP 88420211 A EP88420211 A EP 88420211A EP 88420211 A EP88420211 A EP 88420211A EP 0297001 B1 EP0297001 B1 EP 0297001B1
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EP
European Patent Office
Prior art keywords
tungsten
powders
nickel
values
alloys
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.)
Expired - Lifetime
Application number
EP88420211A
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English (en)
French (fr)
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EP0297001A1 (de
Inventor
Laurent Brunisholz
Guy Nicolas
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.)
Cime Bocuze SA
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Cime Bocuze SA
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Publication date
Application filed by Cime Bocuze SA filed Critical Cime Bocuze SA
Priority to AT88420211T priority Critical patent/ATE68834T1/de
Publication of EP0297001A1 publication Critical patent/EP0297001A1/de
Application granted granted Critical
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    • 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
    • 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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy

Definitions

  • the present invention relates to a method for reducing the dispersion of the values of the mechanical characteristics of tungsten-nickel-iron alloy.
  • US Patent 3,988,118 recommends the systematic addition to the base mixture W, Ni, Fe of molybdenum as well as at least one element taken in the group Co, Cr, Mn, Va, Ta, Y, Re, B, Si.
  • any reduction close to 20 ° C has particularly unfavorable consequences on the elongation. If such a variation is unlikely as a displayed temperature, it is no longer the same for products which are moved in the sintering ovens at too high a speed, because they do not undergo all the heat exchanges on along the oven. However, it is not easy, on an industrial scale, to be able to be completely in control of these variations in speed or even to be sure that, for a temperature displayed on the oven, this always corresponds to the same profile thermal inside the oven, because the heat insulation capacity of the linings and the gas atmospheres of the ovens change over time.
  • the subject of the invention is a process for manufacturing W, Ni, Fe alloy containing at least 85% by weight of tungsten, 1 to 10% of nickel and 1 to 10% of iron, from a initial mixture of powders of W, Ni and Fe of different origins, mixture which is compressed and subjected to fluctuating sintering conditions before wrought and / or heat treatment of the alloy sintered, characterized in that, in order to reduce the dispersion of the mechanical characteristics of the W, Ni, Fe alloys, cobalt and manganese powders are added to the initial mixture of W, Ni, Fe powders in weight proportions relative to the final mixture of 0.02% to 2% cobalt and 0.02% to 2% manganese.
  • This doping can be carried out by mixing, either at the time when nickel and iron are added to the tungsten, or afterwards. It is produced using any type of mixer known to those skilled in the art.
  • the added powders have a particle size close to that of the tungsten powder, that is to say between 1 and 15 ⁇ m FISHER and preferably between 3 and 6 ⁇ m in order to have higher mechanical characteristics.
  • the elastic limit Rp, the breaking strength Rm and the elongation A% were measured on the products after each of the following steps: sintering - degassing - wrought - tempering, identified in Figures 2 and 3 respectively by means of the letters A , B, C, D.
  • FIG. 2 relating to the alloys of the prior art, shows a dispersion of the values measured on each of the powders, in particular with regard to the powder 4.
  • FIG. 3 relating to the alloys according to the invention, shows, on the contrary, a grouping of the values and practically an identity of these values at the final stage of the development of the alloy.
  • the final value of the mechanical characteristics of the doped alloys corresponds substantially to the final value of the undoped powder having the best characteristics, namely: Rp ⁇ 1100 MPa Rm ⁇ 1050 MPa A% ⁇ 8

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)
  • Contacts (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Claims (3)

1. Verfahren zur Herstellung von W-Ni-Fe-Legierungen, die nach Gewicht wenigstens 85% Wolfram, 1 bis 10% Nickel und 1 bis 10% Eisen enthalten, aus einem Ausgangsgemisch von W-, Ni- und Fe-Pulvern verschiedener Ursprünge, welches Gemisch man komprimiert und fluktuierenden Sinterbedingungen vor Knetung und/oder Wärmebehandlung der gesinterten Legierung unterwirft, dadurch gekennzeichnet, daß man zur Verringerung der Streuung der mechanischen Eigenschaften der W-Ni-Fe-Legierungen dem Ausgangsgemisch von W-, Ni- und Fe-Pulvern in kombinierter Weise Kobalt- und Manganpulver in den Gewichtsanteilen bezüglich des Endgemisches von 0,02% bis 2% Kobalt und von 0,02% bis 2% Mangan zusetzt.
2. Verfahren nach dem Anspruch 1, dadurch gekennzeichnet, daß die FISHER-Kornklassierung der zugesetzten Pulver im Bereich von 1 bis 15 µm liegt.
3. Verfahren nach dem Anspruch 2, dadurch gekennzeichnet, daß die Kornklassierung im Bereich von 3 bis 6 µm liegt.
EP88420211A 1987-06-23 1988-06-21 Verfahren zum Vermindern der Streuung der charakteristischen mechanischen Werte bei Wolfram-Nickel-Eisen-Legierungen Expired - Lifetime EP0297001B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420211T ATE68834T1 (de) 1987-06-23 1988-06-21 Verfahren zum vermindern der streuung der charakteristischen mechanischen werte bei wolfram-nickel-eisen-legierungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709169 1987-06-23
FR8709169A FR2617192B1 (fr) 1987-06-23 1987-06-23 Procede pour reduire la dispersion des valeurs des caracteristiques mecaniques d'alliages de tungstene-nickel-fer

Publications (2)

Publication Number Publication Date
EP0297001A1 EP0297001A1 (de) 1988-12-28
EP0297001B1 true EP0297001B1 (de) 1991-10-23

Family

ID=9352646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420211A Expired - Lifetime EP0297001B1 (de) 1987-06-23 1988-06-21 Verfahren zum Vermindern der Streuung der charakteristischen mechanischen Werte bei Wolfram-Nickel-Eisen-Legierungen

Country Status (21)

Country Link
US (1) US4931252A (de)
EP (1) EP0297001B1 (de)
JP (1) JPH08939B2 (de)
KR (1) KR920004706B1 (de)
CN (1) CN1013042B (de)
AT (1) ATE68834T1 (de)
AU (1) AU603229B2 (de)
BR (1) BR8803055A (de)
CA (1) CA1340873C (de)
DE (1) DE3865753D1 (de)
ES (1) ES2025320B3 (de)
FR (1) FR2617192B1 (de)
GR (1) GR3002979T3 (de)
IL (1) IL86816A (de)
IN (1) IN169594B (de)
RU (1) RU1797627C (de)
SG (1) SG12993G (de)
TR (1) TR23644A (de)
UA (1) UA13386A (de)
YU (1) YU46262B (de)
ZA (1) ZA884454B (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019330A (en) * 1990-08-03 1991-05-28 General Electric Company Method of forming improved tungsten ingots
US5234487A (en) * 1991-04-15 1993-08-10 Tosoh Smd, Inc. Method of producing tungsten-titanium sputter targets and targets produced thereby
US5603073A (en) * 1991-04-16 1997-02-11 Southwest Research Institute Heavy alloy based on tungsten-nickel-manganese
US5328657A (en) * 1992-02-26 1994-07-12 Drexel University Method of molding metal particles
US5713981A (en) * 1992-05-05 1998-02-03 Teledyne Industries, Inc. Composite shot
US5527376A (en) * 1994-10-18 1996-06-18 Teledyne Industries, Inc. Composite shot
US6136105A (en) * 1998-06-12 2000-10-24 Lockheed Martin Corporation Process for imparting high strength, ductility, and toughness to tungsten heavy alloy (WHA) materials
US7267794B2 (en) * 1998-09-04 2007-09-11 Amick Darryl D Ductile medium-and high-density, non-toxic shot and other articles and method for producing the same
US6527880B2 (en) 1998-09-04 2003-03-04 Darryl D. Amick Ductile medium-and high-density, non-toxic shot and other articles and method for producing the same
US6270549B1 (en) 1998-09-04 2001-08-07 Darryl Dean Amick Ductile, high-density, non-toxic shot and other articles and method for producing same
US6248150B1 (en) 1999-07-20 2001-06-19 Darryl Dean Amick Method for manufacturing tungsten-based materials and articles by mechanical alloying
US6447715B1 (en) * 2000-01-14 2002-09-10 Darryl D. Amick Methods for producing medium-density articles from high-density tungsten alloys
US7217389B2 (en) * 2001-01-09 2007-05-15 Amick Darryl D Tungsten-containing articles and methods for forming the same
US6749802B2 (en) 2002-01-30 2004-06-15 Darryl D. Amick Pressing process for tungsten articles
WO2003064961A1 (en) * 2002-01-30 2003-08-07 Amick Darryl D Tungsten-containing articles and methods for forming the same
US7000547B2 (en) 2002-10-31 2006-02-21 Amick Darryl D Tungsten-containing firearm slug
US7059233B2 (en) * 2002-10-31 2006-06-13 Amick Darryl D Tungsten-containing articles and methods for forming the same
EP1633897A2 (de) * 2003-04-11 2006-03-15 Darryl Dean Amick System und verfahren zur verarbeitung von ferrowolfram und anderen wolframlegierungen, daraus hergestellte gegenstände und nachweisverfahren dafür
US7399334B1 (en) 2004-05-10 2008-07-15 Spherical Precision, Inc. High density nontoxic projectiles and other articles, and methods for making the same
WO2007060907A1 (ja) * 2005-11-28 2007-05-31 A.L.M.T.Corp. タングステン合金粒、それを用いた加工方法およびその製造方法
US8122832B1 (en) 2006-05-11 2012-02-28 Spherical Precision, Inc. Projectiles for shotgun shells and the like, and methods of manufacturing the same
US9046328B2 (en) 2011-12-08 2015-06-02 Environ-Metal, Inc. Shot shells with performance-enhancing absorbers
US10690465B2 (en) 2016-03-18 2020-06-23 Environ-Metal, Inc. Frangible firearm projectiles, methods for forming the same, and firearm cartridges containing the same
US10260850B2 (en) 2016-03-18 2019-04-16 Environ-Metal, Inc. Frangible firearm projectiles, methods for forming the same, and firearm cartridges containing the same
CN106834856B (zh) * 2017-01-16 2018-11-16 西安华山金属制品有限公司 一种W-Ni-Fe-Y-ZrB2多相合金材料及其制备方法
CN115011853A (zh) * 2022-06-17 2022-09-06 深圳艾利佳材料科技有限公司 延伸性高的钨合金及其制备工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888636A (en) * 1971-02-01 1975-06-10 Us Health High density, high ductility, high strength tungsten-nickel-iron alloy & process of making therefor
JPS4937806A (de) * 1972-08-11 1974-04-08
US3988118A (en) * 1973-05-21 1976-10-26 P. R. Mallory & Co., Inc. Tungsten-nickel-iron-molybdenum alloys
US3979209A (en) * 1975-02-18 1976-09-07 The United States Of America As Represented By The United States Energy Research And Development Administration Ductile tungsten-nickel alloy and method for making same
US3979234A (en) * 1975-09-18 1976-09-07 The United States Of America As Represented By The United States Energy Research And Development Administration Process for fabricating articles of tungsten-nickel-iron alloy
DE3438547C2 (de) * 1984-10-20 1986-10-02 Dornier System Gmbh, 7990 Friedrichshafen Wärmebehandlungsverfahren für vorlegierte, zweiphasige Wolframpulver
US4762559A (en) * 1987-07-30 1988-08-09 Teledyne Industries, Incorporated High density tungsten-nickel-iron-cobalt alloys having improved hardness and method for making same

Also Published As

Publication number Publication date
CN1031257A (zh) 1989-02-22
FR2617192A1 (fr) 1988-12-30
CN1013042B (zh) 1991-07-03
AU603229B2 (en) 1990-11-08
IL86816A (en) 1992-06-21
KR890000193A (ko) 1989-03-13
KR920004706B1 (ko) 1992-06-13
YU120188A (en) 1990-08-31
ATE68834T1 (de) 1991-11-15
CA1340873C (fr) 2000-01-11
EP0297001A1 (de) 1988-12-28
JPH08939B2 (ja) 1996-01-10
SG12993G (en) 1993-05-21
UA13386A (uk) 1997-02-28
TR23644A (tr) 1990-05-28
RU1797627C (ru) 1993-02-23
IL86816A0 (en) 1988-11-30
ZA884454B (en) 1989-03-29
FR2617192B1 (fr) 1989-10-20
ES2025320B3 (es) 1992-03-16
US4931252A (en) 1990-06-05
AU1825288A (en) 1989-01-05
IN169594B (de) 1991-11-16
JPH01195247A (ja) 1989-08-07
YU46262B (sh) 1993-05-28
DE3865753D1 (de) 1991-11-28
GR3002979T3 (en) 1993-01-25
BR8803055A (pt) 1989-01-10

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