EP0674014A1 - Wärmeunbehandelter warmgeschmiedeter stahl mit hervorragender zugfestigkeit, ermüdungsfestigkeit und bearbeitbarkeit - Google Patents

Wärmeunbehandelter warmgeschmiedeter stahl mit hervorragender zugfestigkeit, ermüdungsfestigkeit und bearbeitbarkeit Download PDF

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Publication number
EP0674014A1
EP0674014A1 EP94929026A EP94929026A EP0674014A1 EP 0674014 A1 EP0674014 A1 EP 0674014A1 EP 94929026 A EP94929026 A EP 94929026A EP 94929026 A EP94929026 A EP 94929026A EP 0674014 A1 EP0674014 A1 EP 0674014A1
Authority
EP
European Patent Office
Prior art keywords
machinability
bainite
ratio
steel
tensile strength
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.)
Granted
Application number
EP94929026A
Other languages
English (en)
French (fr)
Other versions
EP0674014B1 (de
EP0674014A4 (de
Inventor
Toshihiko Nippon Steel Corporation Takahashi
Fusao Nippon Steel Corporation Ishikawa
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0674014A1 publication Critical patent/EP0674014A1/de
Publication of EP0674014A4 publication Critical patent/EP0674014A4/de
Application granted granted Critical
Publication of EP0674014B1 publication Critical patent/EP0674014B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Definitions

  • Mn This element adjusts the ratio of bainite structure and turns to MnS that brings a base of composite precipitates giving the precipitation site for ferrite. Mn contents less than 0.40% do not give enough effect; the contents exceeding 2.00% bring too much formation of bainite causing both durability ratio and machinability to lower. Thus, the range of 0.40 - 2.00% is specified.
  • N This element forms nitrides and carbon nitrides with Ti and V. Its contents less than 0.0020% do not give enough effect, and the contents exceeding 0.070% cause both durability ratio and machinability to lower. Thus, the range of 0.0020 - 0.0070% is specified.
  • No. 29, a Comparative Example has a low degree of deoxidation and a smaller effect of making crystals fine since the Al content is low, and has a lower durability ratio compared with the Embodying Examples.
  • No. 30, a Comparative Example has hard inclusion formed due to the high Al content, and has a lower durability ratio compared with the Embodying Examples; the machinability is also poor.
  • No. 37 a Comparative Example, has martensite formed due to the excessive Cr content and does not satisfy the required range for structure ratio of bainite according to the present invention; the durability ratio is low compared with Embodying Examples and the machinability is also poor.
  • the steel according to the present invention provides high tensile strength while keeping the machinability by making a ferrite-bainite two phase structure, and, further, is able to have improved durability ratio, namely fatigue strength, without sacrificing the machinability by realization of fine metallographic structure by use of composite precipitates formed by MnS, Ti nitride and V nitride and by simultaneous realization of strengthening of the ferrite matrix in bainite by V carbide (or carbon nitride); thus, a non-thermal refined steel for hot forging, which has been eagerly demanded, is now provided, satisfying both high fatigue strength with high tensile strength and machinability and bringing great industrial advantages.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Forging (AREA)
EP94929026A 1993-10-12 1994-10-11 Wärmeunbehandelter warmgeschmiedeter stahl mit hervorragender zugfestigkeit, ermüdungsfestigkeit und bearbeitbarkeit Expired - Lifetime EP0674014B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP254335/93 1993-10-12
JP25433593 1993-10-12
JP25433593A JP3241897B2 (ja) 1993-10-12 1993-10-12 引張強度、疲労強度および被削性に優れる熱間鍛造用非調質鋼
PCT/JP1994/001693 WO1995010637A1 (fr) 1993-10-12 1994-10-11 Acier de forgeage a chaud sans traitement thermique, presentant d'excellentes caracteristiques de resistance a la traction et a la fatigue et une tres bonne aptitude a l'usinage

Publications (3)

Publication Number Publication Date
EP0674014A1 true EP0674014A1 (de) 1995-09-27
EP0674014A4 EP0674014A4 (de) 1996-02-07
EP0674014B1 EP0674014B1 (de) 1999-07-28

Family

ID=17263582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94929026A Expired - Lifetime EP0674014B1 (de) 1993-10-12 1994-10-11 Wärmeunbehandelter warmgeschmiedeter stahl mit hervorragender zugfestigkeit, ermüdungsfestigkeit und bearbeitbarkeit

Country Status (6)

Country Link
EP (1) EP0674014B1 (de)
JP (1) JP3241897B2 (de)
KR (1) KR0180938B1 (de)
CN (1) CN1039035C (de)
DE (1) DE69419720T2 (de)
WO (1) WO1995010637A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774098A1 (fr) * 1998-01-28 1999-07-30 Ascometal Sa Acier et procede pour la fabrication de pieces de mecanique secables
EP1201774A2 (de) * 2000-10-25 2002-05-02 Gohsyu Corporation Schmiedeverfahren
EP1676932A1 (de) * 2004-12-28 2006-07-05 Kabushiki Kaisha Kobe Seiko Sho Hochfestes dünnes Stahlblech mit hohem Widerstand gegen Wasserstoffversprödung
CN105734414A (zh) * 2016-02-19 2016-07-06 唐山钢铁集团有限责任公司 一种中碳非调质钢及其生产方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010048426A (ko) * 1999-11-26 2001-06-15 이계안 앞차축 빔용 저 탄소계 고인성 비조질강 단조품
KR100435461B1 (ko) * 1999-12-20 2004-06-10 주식회사 포스코 재질편차가 적은 냉간압조용 강재의 제조방법
KR100401571B1 (ko) * 2001-02-20 2003-10-17 한국기계연구원 고강도 베이나이트계 열간단조용 비조질강재 및 그제조방법
EP1605071B1 (de) * 2003-03-18 2008-10-15 Sumitomo Metal Industries, Ltd. Nicht abgeschreckte/getemperte pleuelstange und zugehöriges herstellungsverfahren
CN100500918C (zh) * 2007-03-29 2009-06-17 攀钢集团成都钢铁有限责任公司 大口径非调质石油套管用钢
CN102851471A (zh) * 2012-09-27 2013-01-02 攀枝花学院 低碳合金钢快速获得细小铁素体晶粒的热处理方法
ES2733805T3 (es) * 2015-11-16 2019-12-03 Deutsche Edelstahlwerke Specialty Steel Gmbh & Co Kg Acero fino estructural con estructura bainitica, pieza forjada fabricada a partir del mismo y procedimiento para fabricar una pieza forjada
JP7010298B2 (ja) * 2017-10-31 2022-02-10 日本製鉄株式会社 熱間鍛造鋼材
CN111154945B (zh) * 2020-01-17 2021-05-28 中天钢铁集团有限公司 一种Ti、V微合金化铝脱氧含硫非调质钢中液析氮化物的控制方法
CN115896614A (zh) * 2022-10-31 2023-04-04 中国第一汽车股份有限公司 一种含铌贝氏体非调质钢材料、转向节以及制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01176055A (ja) * 1987-12-28 1989-07-12 Kawasaki Steel Corp 被削性に優れた熱間鍛造用非調質鋼
JPH05279790A (ja) * 1992-03-30 1993-10-26 Sumitomo Metal Ind Ltd 高温延性の優れた高強度非調質鋼
JPH0673490A (ja) * 1992-08-26 1994-03-15 Aichi Steel Works Ltd 高靭性非調質圧延棒鋼

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589813B2 (ja) * 1978-03-14 1983-02-23 住友金属工業株式会社 非調質鍛鋼品の製造方法
JPS61104049A (ja) * 1984-10-26 1986-05-22 Daido Steel Co Ltd 機械構造用鋼
JPS61261464A (ja) * 1985-05-13 1986-11-19 Daido Steel Co Ltd 機械構造用鋼
JPS62167855A (ja) * 1986-01-21 1987-07-24 Nippon Kokan Kk <Nkk> 耐疲労特性の優れた熱間鍛造用非調質鋼
JPH04210449A (ja) * 1990-12-12 1992-07-31 Toa Steel Co Ltd 高靱性熱間鍛造用非調質鋼

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01176055A (ja) * 1987-12-28 1989-07-12 Kawasaki Steel Corp 被削性に優れた熱間鍛造用非調質鋼
JPH05279790A (ja) * 1992-03-30 1993-10-26 Sumitomo Metal Ind Ltd 高温延性の優れた高強度非調質鋼
JPH0673490A (ja) * 1992-08-26 1994-03-15 Aichi Steel Works Ltd 高靭性非調質圧延棒鋼

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 457 (C-644) 16 October 1989 & JP-A-01 176 055 (KAWASAKI STEEL CORP.) 12 July 1989 *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 068 (C-1161) 4 February 1994 & JP-A-05 279 790 (SUMITOMO METAL IND.LTD.) 26 October 1993 *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 328 (C-1215) 22 June 1994 & JP-A-06 073 490 (AICHI STEEL WORKS LTD.) 15 March 1994 *
See also references of WO9510637A1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774098A1 (fr) * 1998-01-28 1999-07-30 Ascometal Sa Acier et procede pour la fabrication de pieces de mecanique secables
WO1999039018A1 (fr) * 1998-01-28 1999-08-05 Ascometal Acier et procede pour la fabrication de pieces de mecanique secables
EP1201774A2 (de) * 2000-10-25 2002-05-02 Gohsyu Corporation Schmiedeverfahren
EP1201774A3 (de) * 2000-10-25 2004-03-17 Gohsyu Corporation Schmiedeverfahren
EP1676932A1 (de) * 2004-12-28 2006-07-05 Kabushiki Kaisha Kobe Seiko Sho Hochfestes dünnes Stahlblech mit hohem Widerstand gegen Wasserstoffversprödung
CN105734414A (zh) * 2016-02-19 2016-07-06 唐山钢铁集团有限责任公司 一种中碳非调质钢及其生产方法

Also Published As

Publication number Publication date
CN1115582A (zh) 1996-01-24
DE69419720D1 (de) 1999-09-02
JP3241897B2 (ja) 2001-12-25
DE69419720T2 (de) 1999-12-16
CN1039035C (zh) 1998-07-08
WO1995010637A1 (fr) 1995-04-20
KR950704530A (ko) 1995-11-20
EP0674014B1 (de) 1999-07-28
EP0674014A4 (de) 1996-02-07
JPH07109545A (ja) 1995-04-25
KR0180938B1 (ko) 1999-02-18

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