BE855896A - IMPROVEMENTS MADE TO STEELS RESISTANT TO CREEP AND HOT OXIDATION - Google Patents
IMPROVEMENTS MADE TO STEELS RESISTANT TO CREEP AND HOT OXIDATIONInfo
- Publication number
- BE855896A BE855896A BE6046063A BE6046063A BE855896A BE 855896 A BE855896 A BE 855896A BE 6046063 A BE6046063 A BE 6046063A BE 6046063 A BE6046063 A BE 6046063A BE 855896 A BE855896 A BE 855896A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- creep
- steels
- improvements made
- hot oxidation
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Description
<EMI ID=1.1>
La présente invention est relative à des aciers résistant au fluage et à l'oxydation à chaud, aciers destinés spécialement constituer des
<EMI ID=2.1>
aux températures élevées.
<EMI ID=3.1>
dnne les limites suivante" :
<EMI ID=4.1>
<EMI ID=5.1>
tel acier, dont la composition est comprise dans les limites susnommées, présente les propriétés mécaniques minimales suivantes :
<EMI ID=6.1>
Les excellentes valeurs des propriétés mécaniques cldessus mentionnées sont dues à l'application du traitement décrit ci-dessus aux aciers suslndlqués. Un traitement analogue s'applique avec succès
<EMI ID=7.1>
des limites plus larges que celles données ci-dessus, spécifiquement dans les limites suivantes :
<EMI ID=8.1>
<EMI ID=9.1>
suivants dans les limite" ci-après:
<EMI ID=10.1>
<EMI ID=11.1>
ci-dessus et grâce auquel ces aciers présentent également des propriété" lets rendant aptes à être utilisés aussi bien à la température ambiante qu'à chaud.
Ces aciers ont des compositions centésimales comprises entre les limites ci-après :
<EMI ID=12.1>
<EMI ID=13.1>
suivants dans les limites ci-après
<EMI ID=14.1>
<EMI ID=15.1>
thermique particulier composé des deux étapes successives suivantes : <EMI ID=16.1>
<EMI ID=17.1>
<EMI ID=18.1>
composition suivant" ;
<EMI ID=19.1>
<EMI ID=20.1>
<EMI ID=21.1>
<EMI ID=22.1> tension de 102 N/mm<2>.
(Essai la plue long : durée de rupture en 67. 018 heures sous
<EMI ID=23.1> <EMI ID=24.1>
<EMI ID=25.1>
<EMI ID=26.1>
<EMI ID=27.1>
<EMI ID=28.1>
<EMI ID=29.1>
- rupture après 10. 000 heures Boue une tension de 137 N/mm ,
- par extrapolation, rupture après 100. 000 heures sous une <EMI ID=30.1>
- rupture après 10. 000 heures sous une tension de 108 N/mm ,
- par extrapolation, rupture après 100. 000 heures sous une tension de 76 N/mm .
On constate donc que l'application du procédé de l'invention aux aciers susmentionnés au ente'de façon sensible la résistance à la rupture
<EMI ID=31.1>
<EMI ID=32.1>
L'acier considéré présente la composition centésimale ctaprès :
<EMI ID=33.1>
<EMI ID=34.1>
<EMI ID=35.1>
<EMI ID=36.1>
de l'échantillon.
REVENDICATIONS
<EMI ID=37.1>
<EMI ID=38.1>
<EMI ID = 1.1>
The present invention relates to steels resistant to creep and to hot oxidation, steels specially intended to constitute
<EMI ID = 2.1>
at high temperatures.
<EMI ID = 3.1>
denotes the following limits ":
<EMI ID = 4.1>
<EMI ID = 5.1>
such steel, whose composition is within the above-mentioned limits, has the following minimum mechanical properties:
<EMI ID = 6.1>
The excellent values of the mechanical properties mentioned above are due to the application of the treatment described above to the above-mentioned steels. Similar treatment is applied successfully
<EMI ID = 7.1>
broader limits than those given above, specifically in the following limits:
<EMI ID = 8.1>
<EMI ID = 9.1>
following within the limits "below:
<EMI ID = 10.1>
<EMI ID = 11.1>
above and by virtue of which these steels also exhibit properties which make them suitable for use both at ambient temperature and at hot temperature.
These steels have percentages between the limits below:
<EMI ID = 12.1>
<EMI ID = 13.1>
following within the limits below
<EMI ID = 14.1>
<EMI ID = 15.1>
particular thermal composed of the following two successive stages: <EMI ID = 16.1>
<EMI ID = 17.1>
<EMI ID = 18.1>
following composition ";
<EMI ID = 19.1>
<EMI ID = 20.1>
<EMI ID = 21.1>
<EMI ID = 22.1> tension of 102 N / mm <2>.
(The longest test: breaking time in 67.018 hours under
<EMI ID = 23.1> <EMI ID = 24.1>
<EMI ID = 25.1>
<EMI ID = 26.1>
<EMI ID = 27.1>
<EMI ID = 28.1>
<EMI ID = 29.1>
- rupture after 10,000 hours Mud tension of 137 N / mm,
- by extrapolation, rupture after 100,000 hours under an <EMI ID = 30.1>
- rupture after 10,000 hours under a tension of 108 N / mm,
- by extrapolation, rupture after 100,000 hours under a tension of 76 N / mm.
It can therefore be seen that the application of the process of the invention to the aforementioned steels significantly increases the breaking strength.
<EMI ID = 31.1>
<EMI ID = 32.1>
The steel considered has the following percentage composition:
<EMI ID = 33.1>
<EMI ID = 34.1>
<EMI ID = 35.1>
<EMI ID = 36.1>
of the sample.
CLAIMS
<EMI ID = 37.1>
<EMI ID = 38.1>
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6046063A BE855896A (en) | 1977-06-20 | 1977-06-20 | IMPROVEMENTS MADE TO STEELS RESISTANT TO CREEP AND HOT OXIDATION |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6046063A BE855896A (en) | 1977-06-20 | 1977-06-20 | IMPROVEMENTS MADE TO STEELS RESISTANT TO CREEP AND HOT OXIDATION |
BE855896 | 1977-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE855896A true BE855896A (en) | 1977-10-17 |
Family
ID=25658249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE6046063A BE855896A (en) | 1977-06-20 | 1977-06-20 | IMPROVEMENTS MADE TO STEELS RESISTANT TO CREEP AND HOT OXIDATION |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE855896A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073021A1 (en) * | 1981-08-26 | 1983-03-02 | Hitachi, Ltd. | Martensitic heat-resistant steel |
EP0188995A1 (en) * | 1984-10-17 | 1986-07-30 | Mitsubishi Jukogyo Kabushiki Kaisha | High chromium cast steel for high-temperature pressure container and method for the thermal treatment thereof |
WO2022228524A1 (en) * | 2021-04-30 | 2022-11-03 | 宝山钢铁股份有限公司 | High-strength and heat-resistant casing for heavy oil exploration and manufacturing method therefor |
-
1977
- 1977-06-20 BE BE6046063A patent/BE855896A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073021A1 (en) * | 1981-08-26 | 1983-03-02 | Hitachi, Ltd. | Martensitic heat-resistant steel |
EP0188995A1 (en) * | 1984-10-17 | 1986-07-30 | Mitsubishi Jukogyo Kabushiki Kaisha | High chromium cast steel for high-temperature pressure container and method for the thermal treatment thereof |
WO2022228524A1 (en) * | 2021-04-30 | 2022-11-03 | 宝山钢铁股份有限公司 | High-strength and heat-resistant casing for heavy oil exploration and manufacturing method therefor |
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