GB170659A - A process of and apparatus for restoring the strength of steel - Google Patents

A process of and apparatus for restoring the strength of steel

Info

Publication number
GB170659A
GB170659A GB2206620A GB2206620A GB170659A GB 170659 A GB170659 A GB 170659A GB 2206620 A GB2206620 A GB 2206620A GB 2206620 A GB2206620 A GB 2206620A GB 170659 A GB170659 A GB 170659A
Authority
GB
United Kingdom
Prior art keywords
tube
heads
heating
hearth
during
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
GB2206620A
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.)
FORD WHITMAN HARRIS AND HUGH A
Original Assignee
FORD WHITMAN HARRIS AND HUGH A
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 FORD WHITMAN HARRIS AND HUGH A filed Critical FORD WHITMAN HARRIS AND HUGH A
Priority to GB2206620A priority Critical patent/GB170659A/en
Publication of GB170659A publication Critical patent/GB170659A/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)

Abstract

170,659. Harris, F. W., and Bardeen, H. A. July 23, 1920. Modifying physical characters of metals.-For restoring the strength and toughness of fatigued ferrous members, they are raised to a temperature of 750‹-900‹ C. by passing through them an electric current and are subjected to mechanical pressure during heating. Apparatus for carrying out this process comprises a hearth 11 on which a tube 60 to be treated rests clamped between copper heads 30. These heads 30 are connected by cables 32 to a generator or transformer, are slidable on rods 20, and are attached to sliding carriages 21, which are operated by screwed spindles 24 working in stationary nuts 26. Each tube 60 is rolled along the hearth into position between the heads and a hood 40 of heat-insulating material is lowered over it during the heating, longitudinal pressure being brought to bear on the tube by operating the hand-wheels 27. The Specification states that by subjecting the material under treatment to a mechanical pull produced by magnetic action during the heating period, better results are obtained.
GB2206620A 1920-07-23 1920-07-23 A process of and apparatus for restoring the strength of steel Expired GB170659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2206620A GB170659A (en) 1920-07-23 1920-07-23 A process of and apparatus for restoring the strength of steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2206620A GB170659A (en) 1920-07-23 1920-07-23 A process of and apparatus for restoring the strength of steel

Publications (1)

Publication Number Publication Date
GB170659A true GB170659A (en) 1921-10-24

Family

ID=10173341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2206620A Expired GB170659A (en) 1920-07-23 1920-07-23 A process of and apparatus for restoring the strength of steel

Country Status (1)

Country Link
GB (1) GB170659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125417A (en) * 1975-06-16 1978-11-14 Cabot Corporation Method of salvaging and restoring useful properties to used and retired metal articles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125417A (en) * 1975-06-16 1978-11-14 Cabot Corporation Method of salvaging and restoring useful properties to used and retired metal articles

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