EP1173625A1 - Procede de production d'acier pour roulements a billes - Google Patents

Procede de production d'acier pour roulements a billes

Info

Publication number
EP1173625A1
EP1173625A1 EP00906767A EP00906767A EP1173625A1 EP 1173625 A1 EP1173625 A1 EP 1173625A1 EP 00906767 A EP00906767 A EP 00906767A EP 00906767 A EP00906767 A EP 00906767A EP 1173625 A1 EP1173625 A1 EP 1173625A1
Authority
EP
European Patent Office
Prior art keywords
steel
rolling bearing
producing
rolling
casting
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
EP00906767A
Other languages
German (de)
English (en)
Inventor
John Michael Beswick
Garry Wicks
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.)
SKF Engineering and Research Centre BV
Original Assignee
SKF Engineering and Research Centre BV
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 SKF Engineering and Research Centre BV filed Critical SKF Engineering and Research Centre BV
Publication of EP1173625A1 publication Critical patent/EP1173625A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese

Definitions

  • the present invention relates to a method for producing a steel, comprising the provision of a steel containing : - 0.9 -1.03 wt% C;
  • the most generally used rolling bearing steel ASTM A295 52100 comprising approximately 1 wt% C, 0.25 wt% Si, 0.35 wt% Mn and 1.45 wt % Cr can be used for this purpose.
  • ASTM A295 52100 comprising approximately 1 wt% C, 0.25 wt% Si, 0.35 wt% Mn and 1.45 wt % Cr can be used for this purpose.
  • the segregation and primary carbides result in voids after hot working and other defects in a final roll- ing bearing component.
  • GB 2294270A discloses a bearing steal comprising 0.70-.093 wt% C, 0.15-.0.50 wt% Si 0.50-1.10 wt% Mn and 0.30-0.65 wt% Cr. The Cr/C ratio is within the range of .4-.7.
  • EP 0825270A1 discloses a bearing metal comprising 0.95-1.10 wt% C, 0.15-0.70 wt% Si, 1.15 wt% max Mn, 0.90-1.60 wt% Cr.
  • the invention aims to provide a method for producing a steel wherein such a soaking treatment to remove segregation can be avoided and thereby achieve the full cost saving potential without a major sacrifice in quality.
  • said steel comprises nominally 0.96 wt% C; 0.25 wt% Si; 0.85 wt% Mn and 0.8 wt% Cr, and in that either immediately after casting said steel is rolled or is rolled after casting and reheating without a soaking heat treatment, wherein the Cr/C ratio is between 0.7 and 1.20.
  • the Cr/C ratio is between .75 and .95.
  • the Cr/C ratio is between 0.78 and 0.87.
  • the steel described above comprises nominally 0.96 wt% by wt. C, 0.25 wt% Si, 0.85 wt% Mn and 0.80 wt% Cr.
  • Such a steel is also known as ASTM A295 5195. Hardening of this steel can either be obtained by through martensitic hardening or surface (induction) hardening. The suitability of the ASTM A295 5195 steel as a substitute for ASTM
  • A295 52100 is addressed in figures 1 and 2 which show the martensitic through harde- nability and tempering response.
  • bearings which are not subjected to severe loading are particularly suited.
  • a particular application area is wherein the service life of the bearing is not determining the service life of the product in which it is mounted i.e. wherein the service live of the bearing is much longer.
  • Typical examples are electrical motor rolling bearings.
  • the subject invention is not restricted to these application and a person skilled in the art will be able to find further applications being within the range of the appended claims.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de production d'un acier et plus particulièrement d'un acier pour roulements à billes ainsi que le composant d'acier pour roulements ainsi obtenu. Afin de permettre le laminage de l'acier après coulée en continu ou afin de laminer l'acier immédiatement après chauffage sans traitement thermique (trempage), on utilise un acier renfermant essentiellement 0,96 % en poids de C, 0,25 % en poids de Si, 0,85 % en poids de Mn et 0,8 % en poids de Cr. On peut tirer profit d'un tel acier en l'utilisant dans les composants pour roulements à billes et plus particulièrement dans les bagues de roulement.
EP00906767A 1999-04-15 2000-02-24 Procede de production d'acier pour roulements a billes Ceased EP1173625A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1011805A NL1011805C2 (nl) 1999-04-15 1999-04-15 Werkwijze voor het vervaardigen van een kogellagerstaal.
NL1011805 1999-04-15
PCT/NL2000/000116 WO2000063449A1 (fr) 1999-04-15 2000-02-24 Procede de production d'acier pour roulements a billes

Publications (1)

Publication Number Publication Date
EP1173625A1 true EP1173625A1 (fr) 2002-01-23

Family

ID=19769020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00906767A Ceased EP1173625A1 (fr) 1999-04-15 2000-02-24 Procede de production d'acier pour roulements a billes

Country Status (5)

Country Link
EP (1) EP1173625A1 (fr)
JP (1) JP2002542394A (fr)
AU (1) AU2832700A (fr)
NL (1) NL1011805C2 (fr)
WO (1) WO2000063449A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2986829B2 (ja) * 1990-03-03 1999-12-06 川崎製鉄株式会社 転動疲労寿命に優れた軸受用素材の製造方法
DE19520833C2 (de) * 1994-06-16 1998-06-04 Mannesmann Ag Verfahren zur Herstellung eines nahtlosen warmgefertigten Rohres
JP3422094B2 (ja) * 1994-10-14 2003-06-30 日本精工株式会社 転がり軸受
JP3338761B2 (ja) * 1996-02-29 2002-10-28 川崎製鉄株式会社 軸受材料

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0063449A1 *

Also Published As

Publication number Publication date
JP2002542394A (ja) 2002-12-10
NL1011805C2 (nl) 2000-10-17
WO2000063449A1 (fr) 2000-10-26
AU2832700A (en) 2000-11-02

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