EP0894873A1 - Acier pour paliers allié au vanadium - Google Patents

Acier pour paliers allié au vanadium Download PDF

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Publication number
EP0894873A1
EP0894873A1 EP98850125A EP98850125A EP0894873A1 EP 0894873 A1 EP0894873 A1 EP 0894873A1 EP 98850125 A EP98850125 A EP 98850125A EP 98850125 A EP98850125 A EP 98850125A EP 0894873 A1 EP0894873 A1 EP 0894873A1
Authority
EP
European Patent Office
Prior art keywords
steel
vanadium
bearing steel
weight
carbon content
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.)
Withdrawn
Application number
EP98850125A
Other languages
German (de)
English (en)
Inventor
Thore Lund
Staffan Larsson
Patrik Ölund
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.)
Ovako Steel AB
Original Assignee
Ovako Steel AB
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 Ovako Steel AB filed Critical Ovako Steel AB
Publication of EP0894873A1 publication Critical patent/EP0894873A1/fr
Withdrawn legal-status Critical Current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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

Definitions

  • the present invention relates to an improved vanadium alloyed bearing steel.
  • the hardness after martensitic hardening of a soft annealed bearing steel e.g. AISE 52100 is highly dependent on the carbon content in solid solution and thus the austenitisation conditions for a given quench.
  • a higher austenitisation temperature or longer time leads to more dissolution of carbides.
  • the optimum carbon content in solid solution to give the highest hardness is considered to be somewhere between 0.6 to 0.8 weight% for an oil quenched component.
  • a lower carbon content will give a softer martensite.
  • a higher carbon content will lead to an increased retained austenite content which would decrease the hardness and give a disadvantageous martensite morphology. Furthermore, a too large amount of retained austenite will give poor structural stability.
  • Hardened bearing steels are often subjected to wear. To improve wear properties it is necessary to maximize the hardness. However, this could also be further improved by introducing a fraction of hard carbides such as VC.
  • the toughness of a component made from a bearing steel is relatively low. This could result in catastrophically failure and it would therefore be appreciated to increase the toughness. This could be achieved by alloying with Ni which is an element that improves the toughness.
  • Structural stability is important for critical applications and could be improved by Si alloying. Si retards the precipitation of carbide during tempering and thus improves the stability. This could also be beneficial for reducing tempering embrittlement since the precipitation of grain boundary carbides could be reduced.
  • the object of the invention is to provide a steel designed to exhibit greater tolerances in austenitising temperature and time to give optimum carbon content.
  • carbide formers preferably V and also Cr
  • carbide formers preferably V and also Cr
  • an optimal carbon content is obtained.
  • a higher wear resistance is obtained because of the presence hard VC carbides.
  • Improved toughness can be obtained by Ni addition and a high structural stability can be obtained with Si additions.
  • the required hardenability is balanced by adding Cr, Mo and Mn.
  • the steel has the following analysis, in weight-%: C 0.60 - 1.00 Si 0.40 - 2.10 Mn 0.10 - 1.00 Ni 0.50 - 2.00 Cr 0 - 2.00 Mo 0 - 0.50 V 0.25 - 1.00 Fe incl. possible impurities - ad. 100%.
  • the steel has the following analysis, in weight-%: C 0.75 - 0.95 Si 0.80 - 1.80 Mn 0.10 - 1.00 Ni 0.50 - 1.50 Cr 0 - 2.00 Mo 0 - 0.50 V 0.40 - 0.80 Fe incl. possible impurities - ad. 100%.
  • the steel should have sufficient vanadium content to form vanadium carbides which stops excessive carbon from going into solid solution at the austenitisation temperature range.
  • the carbon content and vanadium content should be balanced so that the equilibrium carbon content is optimal at the chosen austenitisation temperature.
  • Such a composition is shown in Table 1.
  • Vanadium alloyed bearing steel according to the invention C Si Mn Cr Ni Mo V min 0.60 0 0 0 0 0.25 max 1.10 2.10 2.00 2.00 2.00 0.75 1.00
  • a graph illustrating the mole percentage of phases in equilibrium versus temperature is shown for a steel according to Table 2.
  • a carbide VC
  • Fig. 2 the corresponding graph illustrates that steel B does not have this fraction of carbides.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Sliding-Contact Bearings (AREA)
  • Rolling Contact Bearings (AREA)
EP98850125A 1997-08-01 1998-07-30 Acier pour paliers allié au vanadium Withdrawn EP0894873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9702851A SE9702851D0 (sv) 1997-08-01 1997-08-01 Vanadium alloyed bearing steel
SE9702851 1997-08-01

Publications (1)

Publication Number Publication Date
EP0894873A1 true EP0894873A1 (fr) 1999-02-03

Family

ID=20407866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98850125A Withdrawn EP0894873A1 (fr) 1997-08-01 1998-07-30 Acier pour paliers allié au vanadium

Country Status (4)

Country Link
EP (1) EP0894873A1 (fr)
JP (1) JPH11117040A (fr)
CN (1) CN1211634A (fr)
SE (1) SE9702851D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035226A1 (fr) * 1999-03-10 2000-09-13 Ovako Steel AB Acier pour paliers

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2647733B1 (fr) 2010-11-29 2015-09-23 JFE Steel Corporation Acier à roulement présentant une excellente aptitude à l'usinage après un recuit de sphéroïdisation et une excellente résistance à la fatigue due à l'hydrogène après une trempe/un revenu
CN103189535B (zh) * 2010-11-29 2016-07-06 杰富意钢铁株式会社 球化退火后的加工性优异且淬火回火后的耐氢疲劳特性优异的轴承钢
CN102399533A (zh) * 2011-09-26 2012-04-04 宁国市东方碾磨材料有限责任公司 耐磨耐腐蚀纳米研磨材料及其制备方法
CN111926255A (zh) * 2020-08-11 2020-11-13 江苏联峰实业有限公司 一种高碳铬轴承钢及其生产方法
CN112011739B (zh) * 2020-08-27 2021-08-06 江苏大学 一种高韧性铁合金及其制备方法和应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0458646A1 (fr) * 1990-05-23 1991-11-27 Aichi Steel Works, Ltd. Acier pour paliers
JPH06287708A (ja) * 1993-03-30 1994-10-11 Kawasaki Steel Corp 繰り返し応力負荷によるミクロ組織変化の遅延特性に優れた軸受鋼
JPH07216508A (ja) * 1994-02-04 1995-08-15 Daido Steel Co Ltd 軸受鋼
JPH07238341A (ja) * 1994-02-24 1995-09-12 Daido Steel Co Ltd 高面圧疲労強度に優れた高周波焼入用鋼

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0458646A1 (fr) * 1990-05-23 1991-11-27 Aichi Steel Works, Ltd. Acier pour paliers
JPH06287708A (ja) * 1993-03-30 1994-10-11 Kawasaki Steel Corp 繰り返し応力負荷によるミクロ組織変化の遅延特性に優れた軸受鋼
JPH07216508A (ja) * 1994-02-04 1995-08-15 Daido Steel Co Ltd 軸受鋼
JPH07238341A (ja) * 1994-02-24 1995-09-12 Daido Steel Co Ltd 高面圧疲労強度に優れた高周波焼入用鋼

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 095, no. 001 28 February 1995 (1995-02-28) *
PATENT ABSTRACTS OF JAPAN vol. 095, no. 011 26 December 1995 (1995-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 001 31 January 1996 (1996-01-31) *
WEGST C.W.: "Stahlschlüssel", 1986, VERLAG STAHLSCHLÜSSEL WEGST, MARBACH, GERMANY, XP002083413 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035226A1 (fr) * 1999-03-10 2000-09-13 Ovako Steel AB Acier pour paliers

Also Published As

Publication number Publication date
SE9702851D0 (sv) 1997-08-01
JPH11117040A (ja) 1999-04-27
CN1211634A (zh) 1999-03-24

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