DE2744047C2 - Use of a high-strength martensite-hardening steel for corrosion-resistant objects - Google Patents
Use of a high-strength martensite-hardening steel for corrosion-resistant objectsInfo
- Publication number
- DE2744047C2 DE2744047C2 DE19772744047 DE2744047A DE2744047C2 DE 2744047 C2 DE2744047 C2 DE 2744047C2 DE 19772744047 DE19772744047 DE 19772744047 DE 2744047 A DE2744047 A DE 2744047A DE 2744047 C2 DE2744047 C2 DE 2744047C2
- Authority
- DE
- Germany
- Prior art keywords
- steel
- corrosion
- less
- hardening steel
- strength
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 28
- 239000010959 steel Substances 0.000 title claims description 28
- 230000007797 corrosion Effects 0.000 title claims description 16
- 238000005260 corrosion Methods 0.000 title claims description 16
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 230000035882 stress Effects 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 2
- 101100457849 Caenorhabditis elegans mon-2 gene Proteins 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000011651 chromium Substances 0.000 description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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
Die Erfindung betrifft einen hochfesten martensitaushärtenden Stahl mit einem Chromgehalt von unter 10% für korrosionsbeständige Gegenstände,The invention relates to a high-strength martensite-hardening steel with a chromium content of less than 10% for corrosion-resistant objects,
Hochfeste martensitaushärtende Stähle haben üblicherweise nach dem Lösungglühen (900° C) bei Raumtemperatur ein welches kohlenstoffarmes nickelmartensltisches Gefüge. Die hohen Festigkeitswerte werden erst nach einer Auslagerungsbehandlung zwischen 400 und 55O1C Infolge Ausscheidung Intermetallischer Phasen erzielt. Martensitaushärtende Stähle mit 18% Nickel besitzen zwar hohe Festigkeit bei ausreichender Zähigkeit, sind aber nicht korrosionsbeständig.High-strength martensite-hardening steels usually have a low-carbon nickel-martensitic structure after solution annealing (900 ° C) at room temperature. The high strength values are only achieved after an aging treatment between 400 and 55O 1 C as a result of the precipitation of intermetallic phases. Martensite-hardening steels with 18% nickel have high strength and sufficient toughness, but are not corrosion-resistant.
Die zur Verbesserung dieser Eigenschalt entwickeltenDeveloped to improve these properties
rostbeständigen chromhaltigen martensitaushärtenden Stähle weisen einen Mindestgehalt an Chrom von 10%, vorzugsweise aber 12% und mehr auf. In der DE-PS 14 58 359 ist ein Stahl mitrust-resistant, chromium-containing martensite-hardening steels have a minimum chromium content of 10%, but preferably 12% and more. In DE-PS 14 58 359 a steel is with
<. 0,03% C, < 0,03% N, <. 0,2% Si, <. 0,2% Mn, 10 bis 13% Cr, 2 bis 12% Co, 1 bis 6% Mo und/oder W, 5,0 bis<. 0.03% C, <0.03% N, <. 0.2% Si, <. 0.2% Mn, 10 to 13% Cr, 2 to 12% Co, 1 to 6% Mo and / or W, 5.0 to
κι 8,0% Ni, 0,1 bis 1,0% Tl, Ta, Al oder Nb einzeln oder zu mehreren und mit weiteren geringeren Zusätzen von Zr, Ce oder Ca, B, Cu, Be und/oder V und Rest Eisen bekannt.κι 8.0% Ni, 0.1 to 1.0% Tl, Ta, Al or Nb individually or in addition several and with other minor additions of Zr, Ce or Ca, B, Cu, Be and / or V and the remainder iron known.
In der US-PS 27 50 283 ist ein Stahl mit weit gefaßter Grenzanaiyse von 0 bis 1,5% C, 0 bis 0,5% N, 10 bis 35% Cr, 0 bis 50% Nl, 0 bis 20% Mn, 0 bis 5% Si, 0 bis 50% Co, 0 bis 10% Mo, 0 bis 10% Cu, 0 bis 5% Al, 0 bis 5% Nb, Ta, V, Zr und Ti, 5 bis 80% B und Rest Eisen angegeben worden.In US-PS 27 50 283 is a steel with broad Limiting analysis from 0 to 1.5% C, 0 to 0.5% N, 10 to 35% Cr, 0 to 50% Nl, 0 to 20% Mn, 0 to 5% Si, 0 to 50% Co, 0 to 10% Mo, 0 to 10% Cu, 0 to 5% Al, 0 to 5% Nb, Ta, V, Zr and Ti, 5 to 80% B and the remainder iron have been given.
Die Festlegung für den Chromgehalt auf mehr als 10% beruht auf der bisher allgemein vertretenen Meinung, daß rd. 1 2λ, Chrom im Stahl vorhanden sein müssen, um überhaupt eine gewisse Korrosionsbeständigkeit erreichen zu können.The determination of the chromium content at more than 10% is based on the generally held opinion so far, that around 1 2λ, chromium must be present in the steel in order to achieve a certain level of corrosion resistance to be able to.
Der Erfindung liegt die Aufgabe zugrunde, einen Stahl zu schaffen, der mindestens die gleich guten Korrosionseigenschaften des bekannten rostbeständigen Baustahls mit 12% Chrom vor allem gegenüber chloridhalllgen Medien, wie Meerwasser, aufweist, aber bessere mechani-The invention is based on the object of creating a steel which has at least the same good corrosion properties as the known rust-resistant structural steel with 12% chromium, especially against chloride-resistant media such as seawater, but has better mechanical
K) sehe Eigenschaften, Insbesondere Zähigkeit, besitzt.K) see properties, especially toughness.
Zur Lösung dieser Aufgabe wird gemäß der Erfindung die Verwendung eines martensitaushärtenden Stahls mit hoher Festigkeit, großer Zähigkeit und guter Korrosionsbeständigkeit mit der Zusammensetzung gemäß An-To solve this problem, according to the invention, the use of a martensite-hardening steel is also provided high strength, high toughness and good corrosion resistance with the composition according to
J5 spruch 1 für den dort genannten Zweck vorgeschlagen.J5 proposal 1 for the purpose mentioned there.
Bevorzugt wird ein Stahl verwendet mit einer Zusammensetzung nach einem der Ansprüche 2 bis 4.A steel with a composition is preferably used according to one of claims 2 to 4.
Der erfindungsgemäß zu verwendende Stahl hat nach dem Lösungsglühen bei Temperaturen im Bereich vonThe steel to be used according to the invention has after the solution heat treatment at temperatures in the range of
4« 300 bis 1150" C mit anschließender Auslagerung bei Temperaturen zwischen 400 und 550° C eine 0,2-Grenze von mindestens 1300 N/mm2 in Verbindung mit einer Bruchzähigkeit (K/,-Wert) von mindestens 3300 N · mnr3'2. Der Κ,,,,-Wert ist mindestens 2000 N · mnr3'2. Der Stahl besitzt also eine ausgezeichnete Spannungsrißkorrosionsbeständigkeit In chloridhaltigen Medien, wie Meerwasser. Er eignet sich daher Insbesondere als Baustahl für Flugzeug- und Schiffsbau bzw. Marinezwecke.4 «300 to 1150" C with subsequent aging at temperatures between 400 and 550 ° C, a 0.2 limit of at least 1300 N / mm 2 in connection with a fracture toughness (K /, value) of at least 3300 N · mnr 3 '2 The Κ ,,,, -. value is at least 2000 N · mnr 3' 2 Now, the steel has an excellent stress corrosion cracking in chloride media, such as sea water is therefore suitable particularly as a structural steel for aircraft construction, shipbuilding and marine use.. .
Der erfindungsgemäß zu verwendende Stahl unterscheidet sich In seiner Zusammensetzung von dem aus der DE-PS 14 58 359 bekannten hochfesten Baustahl durch einen Im Mittel um 3% niedrigeren Chromgehalt, weist aber überraschenderweise die gleich guten Korrosions- und Festigkeitseigenschaften dieses bekannten Stahls auf, übertrifft ihn jedoch beträchtlich in der Zähigkeit, die fast doppelt so hoch Hegt.The steel to be used according to the invention differs from that in its composition the DE-PS 14 58 359 known high-strength structural steel by an average of 3% lower chromium content, but surprisingly shows the equally good corrosion resistance and strength properties of this known steel, but surpasses it considerably in toughness, which is almost twice as high.
In den folgenden Beispielen werden die Eigenschaften des erfindungsgemäß zu verwendenden Stahls angege-The following examples show the properties of the steel to be used according to the invention
bo ben: bo ben:
1. Beispiel1st example
Stahl mit: 0,03% C, 9,13% Cr, 2,0% Mo, 10,3% Ni,
3,4% Co, 0,8% Ti.Steel with: 0.03% C, 9.13% Cr, 2.0% Mo, 10.3% Ni,
3.4% Co, 0.8% Ti.
Wärmebehandlung: 835° C 1 h/Wasser + 835° C 1 h/ Wasser + 480° C
6 h/LuftHeat treatment: 835 ° C 1 h / water + 835 ° C 1 h / water + 480 ° C
6 h / air
A. Festigkeitskennwerte bei Raumtemperatur (Längsproben aus 70 mm Vierkantstäben)A. Strength parameters at room temperature (longitudinal samples made of 70 mm square bars)
N/mm2 N / mm 2
N/mm2 N / mm 2
N/mm-N / mm-
Kerbschlag- K,< -Wert arbeit in J N/mm-in Notched impact K, <value work in JN / mm - in
(ISO-V-Probe) (nach ASTM
E 399-70 T)(ISO-V sample) (according to ASTM
E 399-70 T)
15001500
15651565
26202620
11,0 6311.0 63
8080
400O400O
Die ermittelten Zähigkeitskennwerte liegen für einen Stahl mit einer 0,2-Grenze von 1500 N/mm2 sehr hoch.The toughness values determined are very high for a steel with a 0.2 limit of 1500 N / mm 2.
B. KorrosionselgenschaftenB. Corrosion Properties
Dauertauchversuche in Schwitzwasser (DIN 50017) und In 3% NACl-Lösung: keine Rostbildung Ist nach über 2000 h Versuchsdauer festgestellt worden (Bild 1).Long-term immersion tests in condensation water (DIN 50017) and in 3% NaCl solution: no rust formation Was found after a test duration of more than 2000 h (Fig. 1).
Zur Kennzeichnung der Spannungsrißkorrosionsbeständlgkelt wurden bruchmechanische Untersuchungen In 3% NaCl-Lösung gepuffert auf pH 7 durchgeführt. Dabei 1st die Spannungsintensität, bei der kein kritisches Rißwachstum erfolgt, also der Κ/,,,-Wert (sec = stress corrosion cracking), ermittelt worden. Die Versuchsdauer wurde auf 300 h beschränkt. An dem erfindungsgemäßen Stahl ist ein KA,,-Wert von rd. 2600 N · mirr''J ermittelt worden, der auf die geringe Spannungsrißkorrosionsempfindllchkelt dieses Stahles hinweist.To identify the stress crack corrosion resistance, mechanical fracture tests were carried out in 3% NaCl solution, buffered to pH 7. The stress intensity at which no critical crack growth occurs, i.e. the Κ / ,,, - value (sec = stress corrosion cracking) was determined. The duration of the experiment was limited to 300 hours. At the present steel is a K A ,, - worth about N · mirr '' J has been detected in 2600, which indicates the low Spannungsrißkorrosionsempfindllchkelt this steel..
Zudem sind Stromdichte-Potential-Kurven in 3% NaCl-Lösung gepuffert auf pH 7 potentiokinetlsch mit 50 mV/h Vorschub gefahren worden, um die Lochfraßbeständigkeit zu ermitteln. Es ist ein Durchbruchspotential von rd. 450 raV£W gemessen worden. Da das Ruhepotential des Stahles in diesem Korrosionsmedium um rd. 300mVfi, liegt, läßt das höhere Durchbruchspotentfaf erkennen, daß der Stahl eine gewisse Beständigkeit gegen Lochkorrosion aufweist.In addition, current density-potential curves in 3% NaCl solution, buffered to pH 7, were run potentiokinetlsch with 50 mV / h feed to determine the pitting resistance. A breakthrough potential of around 450 raV £ W has been measured. Since the rest potential of the steel in this corrosion medium is around 300mVfi, the higher breakdown potential shows that the steel has a certain resistance to pitting corrosion.
Im Salzsprühtest nach DIN 50 021 weist der erfindungsgemäß zu verwendende Stahl ein besseres Korrosionsverhalten auf als der bekannte CrNi-Stahl.In the salt spray test according to DIN 50 021, the steel to be used according to the invention exhibits better corrosion behavior on than the well-known CrNi steel.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (4)
weniger als 0,2% Sl0.7 to 2.0% Ti
less than 0.2% Sl
1,5 bis 3 % Mo9 to 12% Nl
1.5 to 3% Mon
0,7 bis 0,9% Tl2 to 4% Co
0.7 to 0.9% part
0 bis 4 % Co
0,7 bis 2,0% Tl3 to 6% Mon
0 to 4% Co
0.7 to 2.0% part
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772744047 DE2744047C2 (en) | 1977-09-30 | 1977-09-30 | Use of a high-strength martensite-hardening steel for corrosion-resistant objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772744047 DE2744047C2 (en) | 1977-09-30 | 1977-09-30 | Use of a high-strength martensite-hardening steel for corrosion-resistant objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2744047A1 DE2744047A1 (en) | 1979-04-19 |
| DE2744047C2 true DE2744047C2 (en) | 1984-04-05 |
Family
ID=6020324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772744047 Expired DE2744047C2 (en) | 1977-09-30 | 1977-09-30 | Use of a high-strength martensite-hardening steel for corrosion-resistant objects |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2744047C2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5855844A (en) * | 1995-09-25 | 1999-01-05 | Crs Holdings, Inc. | High-strength, notch-ductile precipitation-hardening stainless steel alloy and method of making |
| RU2169790C2 (en) * | 1998-11-04 | 2001-06-27 | ОАО "НПО Энергомаш имени академика В.П. Глушко" | Corrosion resistant-martensite aging steel |
| RU2275439C2 (en) * | 2003-04-09 | 2006-04-27 | Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий | Corrosion-proof high-strength steel used in cryogenic technique |
| JP5362995B2 (en) * | 2005-01-25 | 2013-12-11 | ケステック イノベーションズ エルエルシー | Martensitic stainless steel strengthened by Ni3Tiη phase precipitation |
| EP4110965A1 (en) | 2020-02-26 | 2023-01-04 | CRS Holdings, LLC | High fracture toughness, high strength, precipitation hardenable stainless steel |
| RU2738033C1 (en) * | 2020-03-26 | 2020-12-07 | Общество с ограниченной ответственностью "Лаборатория специальной металлургии" | Martensite-aging steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB988452A (en) * | 1962-07-25 | 1965-04-07 | Mini Of Aviat London | Stainless steel |
-
1977
- 1977-09-30 DE DE19772744047 patent/DE2744047C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2744047A1 (en) | 1979-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |