GB850451A - Improvements in or relating to methods of manufacturing hardenable steel strip - Google Patents

Improvements in or relating to methods of manufacturing hardenable steel strip

Info

Publication number
GB850451A
GB850451A GB3340758A GB3340758A GB850451A GB 850451 A GB850451 A GB 850451A GB 3340758 A GB3340758 A GB 3340758A GB 3340758 A GB3340758 A GB 3340758A GB 850451 A GB850451 A GB 850451A
Authority
GB
United Kingdom
Prior art keywords
austenite
strip
martensite
deformed
steel
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
GB3340758A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB850451A publication Critical patent/GB850451A/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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0231—Warm rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • 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
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D2211/008—Martensite
    • 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

Landscapes

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

Abstract

A method of manufacturing hardenable steel strip for clockwork springs or inlays for vehicle rubber tyres in which said strip has a carbon content of at least 0.4% which in a condition in which it consists of at least 80% of austenite, is cooled, and if desired, simultaneously deformed, so that on reaching the recrystallization temperature the steel consists of at least 80% of austenite, and whereafter the steel is deformed macroscopically in a temperature range between the recrystallization temperature and 10 DEG below the temperature at which martensite formation begins but above 100 DEG C., this deformation being so rapid that the austenite does not change at least to a predominant extent into a bainite-like or martensite-like structure, and which deformed austenite is subsequently transformed into bainite or martensite, is characterized in that the macroscopic deformation consists in a considerable flattening of round wire with only a small lengthening of the wire to form strip. in an example a round wire of 1 mm. diameter and having a composition 0.9% C, 0.5% Cr, 1% Mn and balance Fe is chilled from 930 DEG C. to about 230 DEG C. and then rolled out into strip 0.3 to 0.4 mm. thick and about 2 mm. wide. Specification 744,140 is referred to.
GB3340758A 1957-10-22 1958-10-20 Improvements in or relating to methods of manufacturing hardenable steel strip Expired GB850451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL221826 1957-10-22

Publications (1)

Publication Number Publication Date
GB850451A true GB850451A (en) 1960-10-05

Family

ID=19751013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3340758A Expired GB850451A (en) 1957-10-22 1958-10-20 Improvements in or relating to methods of manufacturing hardenable steel strip

Country Status (5)

Country Link
BE (1) BE572211A (en)
CH (1) CH386969A (en)
FR (1) FR1215682A (en)
GB (1) GB850451A (en)
NL (1) NL101164C (en)

Also Published As

Publication number Publication date
CH386969A (en) 1965-01-31
NL101164C (en)
BE572211A (en)
FR1215682A (en) 1960-04-20

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