DE50758C - Process for hardening the inside of steel pipes with a small clear width - Google Patents

Process for hardening the inside of steel pipes with a small clear width

Info

Publication number
DE50758C
DE50758C DENDAT50758D DE50758DA DE50758C DE 50758 C DE50758 C DE 50758C DE NDAT50758 D DENDAT50758 D DE NDAT50758D DE 50758D A DE50758D A DE 50758DA DE 50758 C DE50758 C DE 50758C
Authority
DE
Germany
Prior art keywords
hardening
steel pipes
clear width
small clear
small
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 - Lifetime
Application number
DENDAT50758D
Other languages
German (de)
Original Assignee
M. KRAMER in Berlin N., Chausseestr. 1
Publication of DE50758C publication Critical patent/DE50758C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Control Of Resistance Heating (AREA)

Description

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

BERLIN. GEDRUCKT IN DER REICHSDRUCKEREI.BERLIN. PRINTED IN THE REICH PRINTING COMPANY.

Claims (1)

Patent-Anspruch:Patent claim: Zum Härten der Innenseite von Stahlrohren geringer lichter Weite ein Verfahren, welches dadurch charakterisirt ist, dafs das zu härtende Rohr, welches an ein den Kühlstoff unter Ueberdruck enthaltendes Gefäfs fest angeschlossen ist, durch Hindurchleitung eines elektrischen Stromes erhitzt wird, und dafs nach Unterbrechung des Stromes durch Oeffnen eines Hahnes plötzlich der Durchflufs des Kühlstoffes erfolgt.A process for hardening the inside of steel pipes with a small clear width, which is characterized by the fact that the pipe to be hardened, which is attached to a coolant, is Overpressure containing vessel is firmly connected by passing through an electrical Current is heated, and that after interruption of the current by opening of a tap suddenly the coolant flows through.
DENDAT50758D Process for hardening the inside of steel pipes with a small clear width Expired - Lifetime DE50758C (en)

Publications (1)

Publication Number Publication Date
DE50758C true DE50758C (en)

Family

ID=325578

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT50758D Expired - Lifetime DE50758C (en) Process for hardening the inside of steel pipes with a small clear width

Country Status (1)

Country Link
DE (1) DE50758C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945930C (en) * 1949-01-01 1956-07-19 Gewerkschaft Reuss Process for the production of wear-resistant pipes for the hydraulic and pneumatic conveying of bulk goods
DE970358C (en) * 1951-07-26 1958-09-11 Basf Ag Process for quenching long, thick-walled hollow bodies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945930C (en) * 1949-01-01 1956-07-19 Gewerkschaft Reuss Process for the production of wear-resistant pipes for the hydraulic and pneumatic conveying of bulk goods
DE970358C (en) * 1951-07-26 1958-09-11 Basf Ag Process for quenching long, thick-walled hollow bodies

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