AT236426B - Austenitic chrome-nickel cast steel alloy for the production of objects with great toughness and high wear resistance at elevated temperatures - Google Patents
Austenitic chrome-nickel cast steel alloy for the production of objects with great toughness and high wear resistance at elevated temperaturesInfo
- Publication number
- AT236426B AT236426B AT319562A AT319562A AT236426B AT 236426 B AT236426 B AT 236426B AT 319562 A AT319562 A AT 319562A AT 319562 A AT319562 A AT 319562A AT 236426 B AT236426 B AT 236426B
- Authority
- AT
- Austria
- Prior art keywords
- wear resistance
- objects
- steel alloy
- production
- elevated temperatures
- Prior art date
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title description 2
- 229910045601 alloy Inorganic materials 0.000 title description 2
- 239000000956 alloy Substances 0.000 title description 2
- 238000004519 manufacturing process Methods 0.000 title description 2
- 229910052759 nickel Inorganic materials 0.000 title description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/16—Drill collars
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Heat Treatment Of Articles (AREA)
Description
<Desc/Clms Page number 1>
AustenitischeChrom-Nickel-Stahlgusslegierung zur Herstellung von Gegenständen mit grosser Zähigkeit und hohem
Verschleisswiderstand bei erhöhten Temperaturen
EMI1.1
<Desc/Clms Page number 2>
Die hohe Verschleissfestigkeit der erfindungsgemäss vorgeschlagenen Stahllegierungen wird vorteilhaft durch eine zweistufige Wärmebehandlung erreicht, u. zw. durch ein Lösungsglühen zur Sättigung der austenitischen Grundmasse mit Kohlenstoff und einem daran anschliessenden Ausscheidungsglühen, durch welches in der Grundmasse feine Karbide in günstiger Verteilungsform ausgeschieden werden, die in Verbindung mit dem Karbidnetzwerk zum wesentlich vermehrten Verschleisswiderstand beitragen.
Erfindungsgemäss wird dabei so vorgegangen, dass nach dem Abgiessen in die entsprechenden Formen die Gussteile abkühlen gelassen werden, worauf sie einer Lösungsglühung bei zirka 920-970 C, vorzugsweise 905 C, und einer Haltedauer von mindestens 20 min nach erfolgter Durchwärmung der Gegenstände unterzogen werden. Anschliessend werden die Gussteile an Luft abgekühlt und einer nachfolgenden Ausscheidungsglühung innerhalb eines Temperaturbereiches von zirka 8000C mit einer Mindesthaltedauer von 15 min nach erfolgter Durchwärmung unterzogen.
Das Gefüge der erfindungsgemäss vorgeschlagenen Stahllegierung besteht nach dieser Wärmebehandlung aus einer austenitischen Grundmasse, in der feine Karbide ausgeschieden sind und die auch Anteile von Martensit enthält, sowie aus einem teilweise aufgelösten Karbidnetzwerk.
EMI2.1
<Desc / Clms Page number 1>
Austenitic chrome-nickel cast steel alloy for the manufacture of objects with high toughness and high
Wear resistance at elevated temperatures
EMI1.1
<Desc / Clms Page number 2>
The high wear resistance of the steel alloys proposed according to the invention is advantageously achieved by a two-stage heat treatment, u. between solution heat treatment to saturate the austenitic base material with carbon and subsequent precipitation annealing, through which fine carbides are precipitated in the base material in a favorable distribution form, which in connection with the carbide network contribute to significantly increased wear resistance.
According to the invention, the procedure is that after pouring into the corresponding molds, the cast parts are allowed to cool, whereupon they are subjected to a solution annealing at around 920-970 C, preferably 905 C, and a holding time of at least 20 minutes after the objects have been thoroughly heated. The cast parts are then cooled in air and subjected to a subsequent precipitation annealing within a temperature range of around 8000C with a minimum holding time of 15 minutes after heating.
After this heat treatment, the structure of the steel alloy proposed according to the invention consists of an austenitic base mass in which fine carbides are precipitated and which also contains portions of martensite, as well as a partially dissolved carbide network.
EMI2.1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT319562A AT236426B (en) | 1962-04-17 | 1962-04-17 | Austenitic chrome-nickel cast steel alloy for the production of objects with great toughness and high wear resistance at elevated temperatures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT319562A AT236426B (en) | 1962-04-17 | 1962-04-17 | Austenitic chrome-nickel cast steel alloy for the production of objects with great toughness and high wear resistance at elevated temperatures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT236426B true AT236426B (en) | 1964-10-26 |
Family
ID=3546816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT319562A AT236426B (en) | 1962-04-17 | 1962-04-17 | Austenitic chrome-nickel cast steel alloy for the production of objects with great toughness and high wear resistance at elevated temperatures |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT236426B (en) |
-
1962
- 1962-04-17 AT AT319562A patent/AT236426B/en active
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