EP0377307B1 - Powdered high speed tool steel - Google Patents

Powdered high speed tool steel Download PDF

Info

Publication number
EP0377307B1
EP0377307B1 EP89313418A EP89313418A EP0377307B1 EP 0377307 B1 EP0377307 B1 EP 0377307B1 EP 89313418 A EP89313418 A EP 89313418A EP 89313418 A EP89313418 A EP 89313418A EP 0377307 B1 EP0377307 B1 EP 0377307B1
Authority
EP
European Patent Office
Prior art keywords
speed tool
steel
carbide particles
tool steel
toughness
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
EP89313418A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0377307A1 (en
Inventor
Yoshitomo Hitachi
Kozo Ozaki
Yukinori Matsuda
Noriyoshi Shibata
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18228524&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0377307(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to AT89313418T priority Critical patent/ATE103993T1/de
Publication of EP0377307A1 publication Critical patent/EP0377307A1/en
Application granted granted Critical
Publication of EP0377307B1 publication Critical patent/EP0377307B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Definitions

  • the present invention relates to a powdered high-speed tool steel, and provides high-speed tools having both good wear-resistance and toughness.
  • Powdered high-speed tool steels have advantages, when compared with melted materials, that fine carbide particles precipitate therein uniformly without segregation.
  • the steels thus have higher toughness, and it is possible to improve the wear-resistance by high alloying.
  • JP-A-0119645 discloses that for powdered high-speed tool steel containing tungsten, molybdenum and chromium, in order to provide a material having both desired processability and cutting performance as a tool, the alloy composition should contain large quantities of vanadium and cobalt.
  • the powder of the steel comprises 1.2-4.5% C, up to 3.0% Si, up to 3.0% Mn, 3.0-6.0% Cr, 15.0-60.0% W, 1.0-15.0% V and up to 20.0% Co, the balance being Fe, apart from any impurities, and the steel comprises 10-30.2% by volume of carbide particles having Heywood diameters of at least 1 ⁇ m.
  • W + 2Mo 15.0-60.0%.
  • the powdered high-speed tool steel is produced by spraying the molten metal with a gas or water, to rapidly cool the sprayed drops, and sintering the thus-obtained powder by means of, e.g. HIP.
  • the precipitated carbide particles are generally fine and distributed uniformly. It has been considered that the wear-resistance of the tool is high when the carbide particles in the powdered steel are relatively large, and also that the toughness of the tool is high when the carbide particles are fine.
  • this invention is based on the discovery that, contrary to the prior common understanding, the existence of relatively large carbide particles in an appropriate amount is favourable not only for the wear-resistance but also the toughness.
  • the sizes of the carbide particles can be increased, as is well known, by soaking the powdered high-speed tool steel at a high temperature for a period of time, e.g. 1150-1250°C for 2-10 hours.
  • the relatively large carbide particles content is sufficient at 20-30 volume %; at contents exceeding this level, the effect saturates. Over-soaking causes the formation of huge carbide particles, resulting in decreased toughness.
  • C 1.2 - 4.5 %
  • Si up to 3.0 %
  • Mn up to 3.0%
  • Mo up to 30.0 %
  • Weq 15.0 - 60.0 %
  • the purpose of adding relatively large amount of W to Mo is to obtain a sufficient hardness of quenching-tempering (in terms of HRC, 66 - 67 or higher), and to maintain the anti-breaking strength high (260 kgf/mm2).
  • the powdered high speed tool steel of the present invention can give tools having both the good wear resistance and the high toughness by chosing a particular alloy composition and controlling the sizes and quantities of the carbide particles therein.
  • the present invention solved this problem.
  • Evaluation of the wear resistance is expressed by relative coefficients to the comparative examples in which the coefficient is 100.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
EP89313418A 1988-12-27 1989-12-21 Powdered high speed tool steel Expired - Lifetime EP0377307B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89313418T ATE103993T1 (de) 1988-12-27 1989-12-21 Schnellstahlpulver.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63330077A JP2725333B2 (ja) 1988-12-27 1988-12-27 粉末高速度工具鋼
JP330077/88 1988-12-27

Publications (2)

Publication Number Publication Date
EP0377307A1 EP0377307A1 (en) 1990-07-11
EP0377307B1 true EP0377307B1 (en) 1994-04-06

Family

ID=18228524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89313418A Expired - Lifetime EP0377307B1 (en) 1988-12-27 1989-12-21 Powdered high speed tool steel

Country Status (4)

Country Link
EP (1) EP0377307B1 (ja)
JP (1) JP2725333B2 (ja)
AT (1) ATE103993T1 (ja)
DE (1) DE68914429T2 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69117870T2 (de) * 1990-10-31 1996-10-31 Hitachi Metals Ltd Durch Sintern von Pulver hergestellter Schnellarbeitsstahl und Verfahren zu seiner Herstellung
JP2775614B2 (ja) * 1990-12-19 1998-07-16 株式会社クボタ 高速度鋼系焼結合金
ATE150994T1 (de) * 1991-08-07 1997-04-15 Erasteel Kloster Ab Pulvermetallurgisch hergestellter schnellarbeitsstahl
SE500008C2 (sv) * 1991-08-07 1994-03-21 Erasteel Kloster Ab Snabbstål med god varmhårdhet och slitstyrka framställt av pulver
FR2751349B1 (fr) * 1996-07-19 1998-10-02 Thyssen France Sa Acier pour outils de mise en forme
FR2751348B1 (fr) * 1996-07-19 1998-10-02 Thyssen France Sa Acier pour outils de mise en forme
US6057045A (en) * 1997-10-14 2000-05-02 Crucible Materials Corporation High-speed steel article
AT411441B (de) 2000-06-02 2004-01-26 Boehler Ybbstal Band Gmbh & Co Verbundwerkzeug
JP6096040B2 (ja) * 2013-04-17 2017-03-15 山陽特殊製鋼株式会社 高温焼戻し硬さに優れた粉末高速度工具鋼
JP6345945B2 (ja) * 2014-02-26 2018-06-20 山陽特殊製鋼株式会社 耐摩耗性に優れた粉末高速度工具鋼およびその製造方法
MX2017006100A (es) * 2014-12-17 2017-09-19 Uddeholms Ab Una aleacion resistente al desgaste.
SE541903C2 (en) 2017-11-22 2020-01-02 Vbn Components Ab High hardness 3d printed steel product
JP7396256B2 (ja) * 2020-11-30 2023-12-12 Ｊｆｅスチール株式会社 圧延用ロール外層材及び圧延用複合ロール

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5172906A (en) * 1974-12-23 1976-06-24 Hitachi Metals Ltd Tankabutsuo fukashitakosokudokoguko
JPS609587B2 (ja) * 1978-06-23 1985-03-11 トヨタ自動車株式会社 耐摩耗性焼結合金
JPS57181367A (en) * 1981-04-08 1982-11-08 Furukawa Electric Co Ltd:The Sintered high-v high-speed steel and its production
JPH0674486B2 (ja) * 1987-08-18 1994-09-21 株式会社神戸製鋼所 熱間加工性に優れた高硬度焼結高速度鋼鋼塊
JPH01152242A (ja) * 1987-12-10 1989-06-14 Sanyo Special Steel Co Ltd 粉末冶金法による高靭性高速度鋼

Also Published As

Publication number Publication date
JP2725333B2 (ja) 1998-03-11
DE68914429D1 (de) 1994-05-11
JPH02175846A (ja) 1990-07-09
ATE103993T1 (de) 1994-04-15
DE68914429T2 (de) 1994-07-28
EP0377307A1 (en) 1990-07-11

Similar Documents

Publication Publication Date Title
US4249945A (en) Powder-metallurgy steel article with high vanadium-carbide content
EP0875588B1 (en) Wear resistant, powder metallurgy cold work tool steel articles having high impact toughness and a method for producing the same
EP0813617B1 (en) Stainless steel powders and articles produced therefrom by powder metallurgy
EP0515018B1 (en) Prealloyed high-vanadium, cold work tool steel particles and method for producing the same
EP0377307B1 (en) Powdered high speed tool steel
EP0271238B1 (en) Wear and corrosion resistant alloy articles
EP0726332B1 (en) Sulfur-containing powder-metallurgy tool steel article
EP1129229B1 (en) Steel, use of the steel, product made of the steel and method of producing the steel
DE60002669T2 (de) Hochfester pulvermetallurgischer werkzeugstahl und daraus hergestellter gegenstand
US4780139A (en) Tool steel
US5021085A (en) High speed tool steel produced by powder metallurgy
JPH02182867A (ja) 粒末工具鋼
GB2298869A (en) Stainless steel powders and articles produced therefrom by powder metallurgy
EP0378925A1 (en) Powdered steel for cold processing tool
EP0648851B1 (en) Sulfur-containing powder-metallurgy tool steel article and its method of manufacture
JPH07188859A (ja) 粉末ハイス鋼
JPH0143017B2 (ja)
JPH05171373A (ja) 粉末高速度工具鋼
KR100316342B1 (ko) 분말야금 고속도공구강
KR100299463B1 (ko) 인성및내마모성이우수한냉간가공용공구강제조방법
JPH05163551A (ja) 粉末高速度工具鋼
JPH0941102A (ja) 焼結超硬質合金
JPH0539552A (ja) 粉末高速度工具鋼およびその製造方法
GB1583777A (en) Nitrogen-containing high-speed steel obtained by powder metallurgical process
JPH0978207A (ja) 高焼入性高硬度粉末高速度鋼

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT SE

17P Request for examination filed

Effective date: 19901231

17Q First examination report despatched

Effective date: 19920904

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

REF Corresponds to:

Ref document number: 103993

Country of ref document: AT

Date of ref document: 19940415

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 68914429

Country of ref document: DE

Date of ref document: 19940511

ET Fr: translation filed
EAL Se: european patent in force in sweden

Ref document number: 89313418.9

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961212

Year of fee payment: 8

Ref country code: AT

Payment date: 19961212

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961231

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971221

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971221

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980901

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981209

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19991207

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001222

EUG Se: european patent has lapsed

Ref document number: 89313418.9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051221