GB377488A - An improved slot-nozzle burner for surface hardening steel pieces - Google Patents

An improved slot-nozzle burner for surface hardening steel pieces

Info

Publication number
GB377488A
GB377488A GB25755/31A GB2575531A GB377488A GB 377488 A GB377488 A GB 377488A GB 25755/31 A GB25755/31 A GB 25755/31A GB 2575531 A GB2575531 A GB 2575531A GB 377488 A GB377488 A GB 377488A
Authority
GB
United Kingdom
Prior art keywords
slot
length
channel
longitudinal section
burner
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
GB25755/31A
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke AG
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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Publication of GB377488A publication Critical patent/GB377488A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
    • 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
    • C21D1/06—Surface hardening
    • C21D1/08—Surface hardening with flames

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

377,488. Gas burners. DEUTSCHE EDELSTAHLWERKE AKT.-GES., 578, Gladbacherstrasse, Krefeld, Germany. Sept. 14, 1931, No. 25755. Convention date, Sept. 12, 1930. [Class 75 (i).] In a burner for surface hardening steel pieces which yields a flame having a core of uniform height and which is of the type having an outlet slot c connected with the mixing chamber by a - channel which diverges in one longitudinal section and converges in the longitudinal section perpendicular thereto so that the end dimension of the divergence represents the length, and the end dimension of the convergence the width, of the slot c, the length m of the channel is greater than the length l of the slot. The area of the slot may be less than the cross-sectional area of the entry end b of the channel. The ratio of the divergence of one longitudinal section to the convergence of the other longitudinal section may be selected so that first a gradual increase and then a gradual decrease of the crosssectional area of flow is produced between the end b and the slot. The diverging portion of the channel may be connected to a parallelsided portion of length n<1> and the converging portion to a similar portion of length n<2>, terminating in the slot. The walls of the burner may be thickened and may contain channels i for the circulation of water for cooling purposes. The burner may be supplied with acetylene and oxygen.
GB25755/31A 1930-09-12 1931-09-14 An improved slot-nozzle burner for surface hardening steel pieces Expired GB377488A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157724X 1930-09-12

Publications (1)

Publication Number Publication Date
GB377488A true GB377488A (en) 1932-07-28

Family

ID=5678970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25755/31A Expired GB377488A (en) 1930-09-12 1931-09-14 An improved slot-nozzle burner for surface hardening steel pieces

Country Status (4)

Country Link
AT (1) AT138192B (en)
CH (1) CH157724A (en)
FR (1) FR722825A (en)
GB (1) GB377488A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204611B (en) * 1962-07-11 1965-11-11 Voest Ag Schaelbrenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204611B (en) * 1962-07-11 1965-11-11 Voest Ag Schaelbrenner

Also Published As

Publication number Publication date
CH157724A (en) 1932-10-15
FR722825A (en) 1932-03-26
AT138192B (en) 1934-07-10

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