GB1495431A - Method of toughening metallic material - Google Patents

Method of toughening metallic material

Info

Publication number
GB1495431A
GB1495431A GB49875A GB49875A GB1495431A GB 1495431 A GB1495431 A GB 1495431A GB 49875 A GB49875 A GB 49875A GB 49875 A GB49875 A GB 49875A GB 1495431 A GB1495431 A GB 1495431A
Authority
GB
United Kingdom
Prior art keywords
temperature
cycles
steel
transformation
change
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
GB49875A
Inventor
C Pensa
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of GB1495431A publication Critical patent/GB1495431A/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
    • 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
    • C21D1/785—Thermocycling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • 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
    • C21D2201/00—Treatment for obtaining particular effects
    • C21D2201/02—Superplasticity

Landscapes

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

Abstract

1495431 Cracking at specified temperatures MITSUBISHI JUKOGYO KK 6 Jan 1975 498/75 Heading B3V Metallic material capable of solid state phase transformation with change in temperature is toughened and anti-corrosion properties improved by subjecting it to a series of temperature cycles in each of which the material is heated above a transformation temperature and is cooled below the transformation temperature so that the material exhibits dynamic superplasticity, and mechanically working the material during the cycles. Suitable materials are soft steel, 18-8 stainless steel, high tensile steel and Duralumin (R.T.M.). Preferably the material is subjected to shear stress of 0À1- 0À05 of the yield stress, e.g. 1, or 3 kg./mm.<SP>2</SP>, on the frame of a lathe so that there is no change in shape. High-frequency induction or direct resistance heating may be used followed by compressed-air cooling to produce the desired temperature cycles for a period as short as 30 seconds. Preferably three 20-second cycles are used, varying the temperature between 600‹ and 850‹ C. or between 600‹ and 950‹ C. for soft steel and 1050‹ C. and 1150‹ C. for stainless-steel. Specification 1,495,432 is referred to.
GB49875A 1974-11-18 1974-11-18 Method of toughening metallic material Expired GB1495431A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4987574 1974-11-18

Publications (1)

Publication Number Publication Date
GB1495431A true GB1495431A (en) 1977-12-21

Family

ID=10453855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49875A Expired GB1495431A (en) 1974-11-18 1974-11-18 Method of toughening metallic material

Country Status (1)

Country Link
GB (1) GB1495431A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617333A1 (en) * 2018-08-27 2020-03-04 Roselli Oy Method for manufacturing a hypereutectoid steel product by thermomechanical processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617333A1 (en) * 2018-08-27 2020-03-04 Roselli Oy Method for manufacturing a hypereutectoid steel product by thermomechanical processing

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee