GB1439072A - Thermal treatment of steel - Google Patents

Thermal treatment of steel

Info

Publication number
GB1439072A
GB1439072A GB5210375A GB5210375A GB1439072A GB 1439072 A GB1439072 A GB 1439072A GB 5210375 A GB5210375 A GB 5210375A GB 5210375 A GB5210375 A GB 5210375A GB 1439072 A GB1439072 A GB 1439072A
Authority
GB
United Kingdom
Prior art keywords
steel
quenched
heating
pearlite
transformation
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
Application number
GB5210375A
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.)
Timken US LLC
Original Assignee
Torrington Co
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 Torrington Co filed Critical Torrington Co
Publication of GB1439072A publication Critical patent/GB1439072A/en
Expired 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above

Abstract

1439072 Heat treating hyper eutectoid steel TORRINGTONCO 15 May 1973 [18 May 1972] 52103/75 Divided out of 1439071 Headings C7A and C7U A hyper eutectoid steel containing less than 10% total alloy content is heated to the austenitizing temperature to take initial carbides into solution and quenched into the temperature range 900- 1333‹F bring about transformation to pearlite. It is then re-heated rapidly through A 1,3 and A cm for a time sufficient only to transform ferrite to austenite and the carbide lamellal into fine globules, and quenched. Between the pearlite transformation and final hardening steps the steel may be cooled and possibly also cold worked. In a modification of the process the steel is simultaneously carburized at the initial austenitizing temperature. The rapid heating for hardening may be achieved by resistance or induction heating, or by use of two metal or salt baths in succession, the first providing pre-heating to just below A 1,3 . Suitable steels are
GB5210375A 1972-05-18 1973-05-15 Thermal treatment of steel Expired GB1439072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00254454A US3826694A (en) 1972-05-18 1972-05-18 Thermal treatment of steel

Publications (1)

Publication Number Publication Date
GB1439072A true GB1439072A (en) 1976-06-09

Family

ID=22964374

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5210375A Expired GB1439072A (en) 1972-05-18 1973-05-15 Thermal treatment of steel
GB2306473A Expired GB1439071A (en) 1972-05-18 1973-05-15 Thermal treatment of steel

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2306473A Expired GB1439071A (en) 1972-05-18 1973-05-15 Thermal treatment of steel

Country Status (6)

Country Link
US (1) US3826694A (en)
JP (1) JPS568889B2 (en)
BR (1) BR7303565D0 (en)
CA (1) CA994656A (en)
DE (1) DE2324750B2 (en)
GB (2) GB1439072A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761699A1 (en) * 1997-04-04 1998-10-09 Ascometal Sa STEEL AND METHOD FOR MANUFACTURING WORKPIECE FOR BEARING

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537570B2 (en) * 1974-04-19 1980-09-29
JPS57137790U (en) * 1981-02-23 1982-08-28
NO854396L (en) * 1985-11-05 1987-05-06 Kverneland As PROCEDURE FOR STEEL Curing.
JP3646467B2 (en) * 1996-07-31 2005-05-11 日本精工株式会社 Rolling bearing
DE19849679C1 (en) 1998-10-28 2000-01-05 Skf Gmbh Heat treatment of steel workpieces through hardening
JP6922759B2 (en) 2018-01-25 2021-08-18 トヨタ自動車株式会社 Manufacturing method of steel parts

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761699A1 (en) * 1997-04-04 1998-10-09 Ascometal Sa STEEL AND METHOD FOR MANUFACTURING WORKPIECE FOR BEARING
WO1998045495A1 (en) * 1997-04-04 1998-10-15 Ascometal Steel and process for the manufacture of a part for ball bearing
US6162390A (en) * 1997-04-04 2000-12-19 Ascometal Steel for bearings
US6383317B1 (en) 1997-04-04 2002-05-07 Ascometal Process for the manufacture of a component for bearings and its products

Also Published As

Publication number Publication date
JPS568889B2 (en) 1981-02-26
DE2324750B2 (en) 1976-05-20
DE2324750A1 (en) 1973-11-29
JPS4966524A (en) 1974-06-27
US3826694A (en) 1974-07-30
BR7303565D0 (en) 1974-06-27
AU5458973A (en) 1974-10-17
CA994656A (en) 1976-08-10
GB1439071A (en) 1976-06-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee