JPS5644776A - Annealing method for metal tube for sheathed heater - Google Patents
Annealing method for metal tube for sheathed heaterInfo
- 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
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.
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)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5091543A (en) * | 1973-12-14 | 1975-07-22 | ||
JPS5092835A (en) * | 1973-12-20 | 1975-07-24 |
-
1979
- 1979-09-20 JP JP54121115A patent/JPS5825746B2/en not_active Expired
Patent Citations (2)
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)
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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