FR2333866A1 - Bright annealing stainless steels - using furnace and cooling chamber fed with regenerated and recycled protective gas (SW 13.5.76) - Google Patents

Bright annealing stainless steels - using furnace and cooling chamber fed with regenerated and recycled protective gas (SW 13.5.76)

Info

Publication number
FR2333866A1
FR2333866A1 FR7531640A FR7531640A FR2333866A1 FR 2333866 A1 FR2333866 A1 FR 2333866A1 FR 7531640 A FR7531640 A FR 7531640A FR 7531640 A FR7531640 A FR 7531640A FR 2333866 A1 FR2333866 A1 FR 2333866A1
Authority
FR
France
Prior art keywords
protective gas
furnace
cooling chamber
stainless steels
plant
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.)
Granted
Application number
FR7531640A
Other languages
French (fr)
Other versions
FR2333866B1 (en
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.)
Ebner Industrieofenbau GmbH
Original Assignee
Ebner Industrieofenbau GmbH
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 Ebner Industrieofenbau GmbH filed Critical Ebner Industrieofenbau GmbH
Publication of FR2333866A1 publication Critical patent/FR2333866A1/en
Application granted granted Critical
Publication of FR2333866B1 publication Critical patent/FR2333866B1/fr
Granted 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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)
  • Tunnel Furnaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

Plant for the bright annealing of bars or tubes made of steel contg. Cr and opt. Ni, e.g. stainless steels, uses a roller hearth furnace followed by a chamber for rapid cooling; a protective atmos. with a high hydrogen content is used in both the cooling chamber and the furnace. The inlet end of the furnace is fitted with an air lock, and a second air lock is provided on the outlet end of the cooling chamber; both air locks can be evacuated, or filled with the protective gas or nitrogen; the various items of plant are assembled in a row using air-tight joints; and appts. is used for the regeneration and recirculation of the protective gas. The plant can be employed for either continuous- or batch-annealing. An inexpensive process is provided, using the min. amt. of costly protective gas, esp. when a annealing tubes with bore above 100 mm. dia.
FR7531640A 1974-10-31 1975-10-16 Bright annealing stainless steels - using furnace and cooling chamber fed with regenerated and recycled protective gas (SW 13.5.76) Granted FR2333866A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT874874A ATA874874A (en) 1974-10-31 1974-10-31 ANNEALING SYSTEM FOR BARS AND TUBES IN CHROME-NICKEL STEEL OR CHROME STEEL

Publications (2)

Publication Number Publication Date
FR2333866A1 true FR2333866A1 (en) 1977-07-01
FR2333866B1 FR2333866B1 (en) 1978-04-14

Family

ID=3608203

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531640A Granted FR2333866A1 (en) 1974-10-31 1975-10-16 Bright annealing stainless steels - using furnace and cooling chamber fed with regenerated and recycled protective gas (SW 13.5.76)

Country Status (3)

Country Link
AT (1) ATA874874A (en)
FR (1) FR2333866A1 (en)
SE (1) SE7511827L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533942A1 (en) * 1982-10-05 1984-04-06 Mannesmann Ag METHOD AND DEVICE FOR THE THERMAL TREATMENT OF TUBES
EP2617838A1 (en) * 2012-01-20 2013-07-24 Schwartz, Eva Method for operating an oven and oven

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2174192A1 (en) * 1972-02-29 1973-10-12 Graenges Eng Ab
FR2205573A1 (en) * 1972-11-06 1974-05-31 Graenges Eng Ab

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2174192A1 (en) * 1972-02-29 1973-10-12 Graenges Eng Ab
FR2205573A1 (en) * 1972-11-06 1974-05-31 Graenges Eng Ab

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533942A1 (en) * 1982-10-05 1984-04-06 Mannesmann Ag METHOD AND DEVICE FOR THE THERMAL TREATMENT OF TUBES
EP2617838A1 (en) * 2012-01-20 2013-07-24 Schwartz, Eva Method for operating an oven and oven

Also Published As

Publication number Publication date
ATA874874A (en) 1978-02-15
SE7511827L (en) 1976-05-03
FR2333866B1 (en) 1978-04-14

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