JPS5644776A - Annealing method for metal tube for sheathed heater - Google Patents

Annealing method for metal tube for sheathed heater

Info

Publication number
JPS5644776A
JPS5644776A JP12111579A JP12111579A JPS5644776A JP S5644776 A JPS5644776 A JP S5644776A JP 12111579 A JP12111579 A JP 12111579A JP 12111579 A JP12111579 A JP 12111579A JP S5644776 A JPS5644776 A JP S5644776A
Authority
JP
Japan
Prior art keywords
metal tube
oxidation
blackening
high temperature
partial pressure
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
JP12111579A
Other languages
Japanese (ja)
Other versions
JPS5825746B2 (en
Inventor
Daiji Sakamoto
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP54121115A priority Critical patent/JPS5825746B2/en
Publication of JPS5644776A publication Critical patent/JPS5644776A/en
Publication of JPS5825746B2 publication Critical patent/JPS5825746B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Resistance Heating (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To make a stable blackening treatment possible, by treating the metal tube containing a specific quantity of Cr at a high temperature under the atmosphere of specific condition and forming oxidized film essentially composed of a specific thickness of Cr on the surface of the metal tube. CONSTITUTION:Metal tube composed of alloy containing >=5wt% Cr, is heated at a high temperature under wet hydrogen atmosphere of 10<-12>-10<-18>atm oxygen partial pressure and dense oxidized film of 0.2-3mu thickness essentially composed of Cr, is formed on the surface of the metal tube. Producing quantity of Cr2O3 at blackening treat time, is sufficiently produced by containing >=5% of Cr. Adequate oxidation speed is obtained by limiting the oxygen partial pressure in a fixed range. The deflective oxidation unenness at the blackening time is sharply decreased by using the metal obtained in this way and the blackened film having each resistance of corrosion and oxidation is obtained.
JP54121115A 1979-09-20 1979-09-20 Annealing method for metal tubes for sheathed heaters Expired JPS5825746B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54121115A JPS5825746B2 (en) 1979-09-20 1979-09-20 Annealing method for metal tubes for sheathed heaters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54121115A JPS5825746B2 (en) 1979-09-20 1979-09-20 Annealing method for metal tubes for sheathed heaters

Publications (2)

Publication Number Publication Date
JPS5644776A true JPS5644776A (en) 1981-04-24
JPS5825746B2 JPS5825746B2 (en) 1983-05-30

Family

ID=14803248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54121115A Expired JPS5825746B2 (en) 1979-09-20 1979-09-20 Annealing method for metal tubes for sheathed heaters

Country Status (1)

Country Link
JP (1) JPS5825746B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172527A (en) * 2020-01-19 2020-05-19 哈尔滨锅炉厂有限责任公司 Method for coating micron-sized material with chromium oxide coating by utilizing segregation and cohesion of chromium oxide and accelerating method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6186043B1 (en) 2016-05-31 2017-08-23 日本冶金工業株式会社 Fe-Ni-Cr alloy, Fe-Ni-Cr alloy strip, sheathed heater, method for producing Fe-Ni-Cr alloy, and method for producing sheathed heater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091543A (en) * 1973-12-14 1975-07-22
JPS5092835A (en) * 1973-12-20 1975-07-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091543A (en) * 1973-12-14 1975-07-22
JPS5092835A (en) * 1973-12-20 1975-07-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172527A (en) * 2020-01-19 2020-05-19 哈尔滨锅炉厂有限责任公司 Method for coating micron-sized material with chromium oxide coating by utilizing segregation and cohesion of chromium oxide and accelerating method

Also Published As

Publication number Publication date
JPS5825746B2 (en) 1983-05-30

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