GB304196A - Improvements in and relating to the heat treatment of steel - Google Patents

Improvements in and relating to the heat treatment of steel

Info

Publication number
GB304196A
GB304196A GB904/29A GB90429A GB304196A GB 304196 A GB304196 A GB 304196A GB 904/29 A GB904/29 A GB 904/29A GB 90429 A GB90429 A GB 90429A GB 304196 A GB304196 A GB 304196A
Authority
GB
United Kingdom
Prior art keywords
pieces
point
heated
steel
relating
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
GB904/29A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB304196A publication Critical patent/GB304196A/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
    • C21D1/34—Methods of heating
    • C21D1/40—Direct resistance heating

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 Articles (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

304,196. Hanemann, H. Jan. 16, 1928, [Convention date]. No Patent granted (Sealing fee not paid). Annealing.-In a process for improving pieces of steel, the pieces are heated electrically uniformly quickly through their entire crosssection beyond the Ar3 point at not more than 50‹ C. above the point. The pieces are first heated in a furnace for a long time to a temperature of 50‹-20‹ C. below the Ar3 point. The pieces are then heated electrically either by direct resistance heating or by eddy currents, the current being cut off soon after the temperature has passed the Ar3 point. In some cases the pieces may be heated again beyond the Ar3 point.
GB904/29A 1928-01-16 1929-01-10 Improvements in and relating to the heat treatment of steel Expired GB304196A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE304196X 1928-01-16

Publications (1)

Publication Number Publication Date
GB304196A true GB304196A (en) 1930-04-10

Family

ID=6116165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB904/29A Expired GB304196A (en) 1928-01-16 1929-01-10 Improvements in and relating to the heat treatment of steel

Country Status (2)

Country Link
FR (1) FR667217A (en)
GB (1) GB304196A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016285B (en) * 1955-04-16 1957-09-26 Bochumer Ver Fuer Gussstahlfab Process for the production of steel with a structure improved by the type of heating

Also Published As

Publication number Publication date
FR667217A (en) 1929-10-14

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