GB833078A - Improved hardened steels and process for their production - Google Patents

Improved hardened steels and process for their production

Info

Publication number
GB833078A
GB833078A GB24494/57A GB2449457A GB833078A GB 833078 A GB833078 A GB 833078A GB 24494/57 A GB24494/57 A GB 24494/57A GB 2449457 A GB2449457 A GB 2449457A GB 833078 A GB833078 A GB 833078A
Authority
GB
United Kingdom
Prior art keywords
steels
steel
temperature
hypereutectoid
cooling
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
GB24494/57A
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.)
ARTHUR PATRICK TAYLOR GILL
Original Assignee
ARTHUR PATRICK TAYLOR GILL
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 ARTHUR PATRICK TAYLOR GILL filed Critical ARTHUR PATRICK TAYLOR GILL
Priority to GB24494/57A priority Critical patent/GB833078A/en
Publication of GB833078A publication Critical patent/GB833078A/en
Expired 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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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)
  • Heat Treatment Of Steel (AREA)

Abstract

A process for the heat treatment of steel comprises heating the steel to austenizing temperature and maintaining the austenizing condition to allow solution and diffusion of the constituents with control of grain size, cooling the steel sufficiently and at such speed that pearlite and other soft structures are suppressed, to a temperature in the ranges 1050 DEG C. to 200 DEG C. for high speed steels, 950 DEG C. to 200 DEG C. for high alloy steels. 750 DEG C. to 200 DEG C. for hypereutectoid low alloy and hypereutectoid carbon steels but excluding any temperature in the ranges 950 DEG C. to 650 DEG C. for high speed steels, 850 DEG C. to 550 DEG C. for high alloy steels. 700 DEG C. to 400 DEG C. for hypereutectoid low alloy and hypereutectoid carbon steels; holding the steel at the selected temperature to effect micro-structure growth by prenucleation with or without isothermal transformation, and finally cooling the steel to effect the final transformation. The heating to austenizing temperature may be in steps and the final cooling, which may be to a sub-zero temperature, may be direct or in steps. The steel may be subjected to a tempering treatment after cooling. The treatment may be applied to the following steels:- <TABS:0833078/II/1> The balance in each case being Fe.
GB24494/57A 1957-08-02 1957-08-02 Improved hardened steels and process for their production Expired GB833078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24494/57A GB833078A (en) 1957-08-02 1957-08-02 Improved hardened steels and process for their production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24494/57A GB833078A (en) 1957-08-02 1957-08-02 Improved hardened steels and process for their production

Publications (1)

Publication Number Publication Date
GB833078A true GB833078A (en) 1960-04-21

Family

ID=10212546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24494/57A Expired GB833078A (en) 1957-08-02 1957-08-02 Improved hardened steels and process for their production

Country Status (1)

Country Link
GB (1) GB833078A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015061281A1 (en) * 2013-10-21 2015-04-30 Magna International Inc. Method for trimming a hot formed part

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015061281A1 (en) * 2013-10-21 2015-04-30 Magna International Inc. Method for trimming a hot formed part

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