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GB1490535A - Manufacturing a hardened steel article - Google Patents

Manufacturing a hardened steel article

Info

Publication number
GB1490535A
GB1490535A GB48077/74A GB4807774A GB1490535A GB 1490535 A GB1490535 A GB 1490535A GB 48077/74 A GB48077/74 A GB 48077/74A GB 4807774 A GB4807774 A GB 4807774A GB 1490535 A GB1490535 A GB 1490535A
Authority
GB
United Kingdom
Prior art keywords
steel
blank
cooling
nov
hardened
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
GB48077/74A
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.)
Norrbottens Jarnverk AB
Original Assignee
Norrbottens Jarnverk AB
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 Norrbottens Jarnverk AB filed Critical Norrbottens Jarnverk AB
Publication of GB1490535A publication Critical patent/GB1490535A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Reinforced Plastic Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

1490535 Alloys NORRBOTTENS JARNVERK AB 6 Nov 1974 [6 Nov 1973] 48077/74 Heading C7A [Also in Division B3] A hardened steel article is formed by heating a hardenable steel blank to hardening temperature and then placing it in a forming apparatus in which the blank is deformed and simultaneously rapidly cooled to obtain a martensitic and/or bainitic structure which the blank remains in the apparatus which serves as a gauge for preventing distortion. Bearing shells, vehicle bumpers &c. may be formed by pressing between tools or between a tool and pressure medium. The hardened pressing may be used without tempering. It is also stated that the process is applicable to forming by extrusion, drop forging and explosion. Cooling is by cooling parts of the forming device and/or by direct cooling with salt water or oil. The steel used may have the following composition, percentage by weight: C less than 0.4% Mn 0.5 - 2.0% P > 0.05% S # 0.05% Cr 0.1 - 0.5% and/or Mo 0.05 - 0.5% Ti # 0.1% B 0.005 - 0.01% Al # 0.1% balance Fe and impurities including Si. The steel is heated to above AC 3 e.g. 775 - 1000‹C, preferably 900‹C.
GB48077/74A 1973-11-06 1974-11-06 Manufacturing a hardened steel article Expired GB1490535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7315058A SE435527B (en) 1973-11-06 1973-11-06 PROCEDURE FOR PREPARING A PART OF Hardened Steel

Publications (1)

Publication Number Publication Date
GB1490535A true GB1490535A (en) 1977-11-02

Family

ID=20319025

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48077/74A Expired GB1490535A (en) 1973-11-06 1974-11-06 Manufacturing a hardened steel article

Country Status (6)

Country Link
DE (1) DE2452486C2 (en)
DK (1) DK576474A (en)
FI (1) FI321874A (en)
GB (1) GB1490535A (en)
NO (1) NO141612C (en)
SE (1) SE435527B (en)

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NO743986L (en) 1975-06-02
SE435527B (en) 1984-10-01
NO141612B (en) 1980-01-02
DK576474A (en) 1975-08-04
FI321874A (en) 1975-05-07
DE2452486C2 (en) 1985-10-17
NO141612C (en) 1980-04-09
DE2452486A1 (en) 1975-05-07
SE7315058L (en) 1975-05-07

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PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19941105