FR2170971A1 - Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogen - Google Patents
Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogenInfo
- Publication number
- FR2170971A1 FR2170971A1 FR7204448A FR7204448A FR2170971A1 FR 2170971 A1 FR2170971 A1 FR 2170971A1 FR 7204448 A FR7204448 A FR 7204448A FR 7204448 A FR7204448 A FR 7204448A FR 2170971 A1 FR2170971 A1 FR 2170971A1
- Authority
- FR
- France
- Prior art keywords
- heating
- nitrogen
- hydrogen
- corrosion resistant
- resistant steel
- 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
- 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
- C21D1/76—Adjusting the composition of the atmosphere
-
- 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
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
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 Strip Materials And Filament Materials (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Steel with a C content >0.05% is protected against corrosion by heating the steel at 650-850 degrees C in a moist mixt. of N2 and H. The thermal treatment is pref. followed by treatment in a phosphate bath.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE794528D BE794528A (en) | 1972-02-10 | PROCESS FOR PROTECTING STEELS AGAINST CORROSION | |
FR7204448A FR2170971A1 (en) | 1972-02-10 | 1972-02-10 | Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogen |
DE19732305996 DE2305996A1 (en) | 1972-02-10 | 1973-02-07 | PROCESS FOR ANTI-CORROSION TREATMENT OF STEEL |
LU66991D LU66991A1 (en) | 1972-02-10 | 1973-02-08 | |
IT4730973A IT984363B (en) | 1972-02-10 | 1973-02-09 | PROCEDURE TO PROTECT STEELS AGAINST CORROSION |
JP1701673A JPS4984931A (en) | 1972-02-10 | 1973-02-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7204448A FR2170971A1 (en) | 1972-02-10 | 1972-02-10 | Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogen |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2170971A1 true FR2170971A1 (en) | 1973-09-21 |
FR2170971B1 FR2170971B1 (en) | 1974-06-28 |
Family
ID=9093271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7204448A Granted FR2170971A1 (en) | 1972-02-10 | 1972-02-10 | Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogen |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4984931A (en) |
BE (1) | BE794528A (en) |
DE (1) | DE2305996A1 (en) |
FR (1) | FR2170971A1 (en) |
IT (1) | IT984363B (en) |
LU (1) | LU66991A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4334938A (en) * | 1980-08-22 | 1982-06-15 | Air Products And Chemicals, Inc. | Inhibited annealing of ferrous metals containing chromium |
-
0
- BE BE794528D patent/BE794528A/en unknown
-
1972
- 1972-02-10 FR FR7204448A patent/FR2170971A1/en active Granted
-
1973
- 1973-02-07 DE DE19732305996 patent/DE2305996A1/en active Pending
- 1973-02-08 LU LU66991D patent/LU66991A1/xx unknown
- 1973-02-09 IT IT4730973A patent/IT984363B/en active
- 1973-02-10 JP JP1701673A patent/JPS4984931A/ja active Pending
Non-Patent Citations (1)
Title |
---|
NEANT * |
Also Published As
Publication number | Publication date |
---|---|
BE794528A (en) | 1973-05-16 |
LU66991A1 (en) | 1973-04-19 |
FR2170971B1 (en) | 1974-06-28 |
DE2305996A1 (en) | 1973-08-16 |
JPS4984931A (en) | 1974-08-15 |
IT984363B (en) | 1974-11-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE9002391D0 (en) | METHOD OF NITRIDING STEEL | |
GB2102287B (en) | Use of aromatase-inhibitors with antiandrogens for treatment of prostatic hyperplasia. | |
ES8103781A1 (en) | Process for increasing the corrosion resistance of nitrided structural parts made of iron material | |
ES398145A1 (en) | Heater descaling | |
ES8202064A1 (en) | Nitride casehardening process and the nitrided product thereof | |
FR2170971A1 (en) | Corrosion resistant steel - by heating in moist atmosphere of nitrogen and hydrogen | |
Edenhofer | Technology, advantages and applications of direct-feed atmospheres for carburising | |
FR2254646A1 (en) | Iron shot suitable for shot-gun cartridges | |
GB1233847A (en) | ||
GB1499711A (en) | Nitriding | |
GB1042612A (en) | Improvements in or relating to articles of boron-containing steels | |
GB1011580A (en) | Surface treatment of mild steel | |
JPS52150714A (en) | Decarburization preventing in atmospheric annealing of hot rolled steel material | |
Staines et al. | Austenitic thermochemical treatments in a glow discharge | |
FR2055297A5 (en) | Corrosion preventing oxide coatings | |
Sueyoshi et al. | Effect of austenitizing treatment followed by slow cooling on graphitization in hypo-eutectoid alloy steels | |
FR2269392A1 (en) | Ferrous products manufacture - by direct reduction of gaseous iron compounds by a turbulent reducing gas | |
NL7405952A (en) | Ferrous products manufacture - by direct reduction of gaseous iron compounds by a turbulent reducing gas | |
ES366233A1 (en) | Method for controlling the nitriding tendency of aluminium-killed steel | |
JPS5332837A (en) | Method of ionitriding* carburizing and carbonitriding steel and the like | |
JPS5271373A (en) | Method of treating ammonia-cont. gas | |
Child et al. | The Effect of Thermo-Chemical Treatments on the Mechanical Properties of Tool Steel. I.(Retroactive Coverage) | |
FR2142777A1 (en) | M-thymol prepn - from m-cresol | |
JPS5263812A (en) | Martensitic stainless steel for nitriding | |
FR2162654A1 (en) | Accelerated gas nitriding process - for (ferrous) metals using carbon monoxide in ammonical nitriding gas |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |