DE2744047A1 - High tenacity, corrosion-resistant strong martensite-hardening steel - contains chromium, nickel, molybdenum, titanium, and opt. cobalt and copper - Google Patents
High tenacity, corrosion-resistant strong martensite-hardening steel - contains chromium, nickel, molybdenum, titanium, and opt. cobalt and copperInfo
- Publication number
- DE2744047A1 DE2744047A1 DE19772744047 DE2744047A DE2744047A1 DE 2744047 A1 DE2744047 A1 DE 2744047A1 DE 19772744047 DE19772744047 DE 19772744047 DE 2744047 A DE2744047 A DE 2744047A DE 2744047 A1 DE2744047 A1 DE 2744047A1
- Authority
- DE
- Germany
- Prior art keywords
- steel
- corrosion
- copper
- martensite
- nickel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 14
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 8
- 230000007797 corrosion Effects 0.000 title claims description 25
- 238000005260 corrosion Methods 0.000 title claims description 25
- 229910052802 copper Inorganic materials 0.000 title claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims 2
- 239000010949 copper Substances 0.000 title claims 2
- 229910052750 molybdenum Inorganic materials 0.000 title abstract description 6
- 239000011651 chromium Substances 0.000 title description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title description 2
- 239000011733 molybdenum Substances 0.000 title description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title 1
- 239000010941 cobalt Substances 0.000 title 1
- 229910017052 cobalt Inorganic materials 0.000 title 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title 1
- 239000010936 titanium Substances 0.000 title 1
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 3
- 230000035882 stress Effects 0.000 claims description 8
- 238000005336 cracking Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 239000013535 sea water Substances 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000008207 working material Substances 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 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
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000007921 spray Substances 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)
Abstract
Description
Martensitaushärtender Stahl. Martensite hardening steel.
Die Erfindung betrifft einen hochfesten korrosionsbeständigen martensitaushärtenden Stahl mit einem Chromgehalt von unter 10 Wo.The invention relates to a high-strength, corrosion-resistant martensite-hardening material Steel with a chromium content of less than 10 weeks.
Hochfeste martensitaushärtende Stähle sind dadurch gekennzeichnet, daß sie nach dem Lösungsglühen bei Temperaturen um 9000C bei Raumtemperatur einen weichen kohlenstoffatomen Nickelmartensit aufweisen. Die hohen Festigkeitswerte werden erst einer Auslagerungsbehandlung zwischen 400 und 550°C infolge Ausscheidung intermetallischer Phasen erzielt. Die auf der Basis von 18 Wo Nickel entwickelten martensitaushärtenden Stähle besitzen zwar eine hohe Festigkeit bei ausreichender Zähigkeit, sind aber nicht korrosionsbeständig.High-strength martensite-hardening steels are characterized by that after solution heat treatment at temperatures around 9000C at room temperature soft carbon atoms have nickel martensite. The high strength values are only exposed to an aging treatment between 400 and 550 ° C as a result of precipitation intermetallic phases achieved. Developed on the basis of 18 wk of nickel Martensite-hardening steels have a high strength with sufficient strength Toughness, but are not resistant to corrosion.
Die zur Verbesserung dieser Eigenschaft entwickelten rostbeständigen chromhaltigen martensitaushärtenden Stähle weise einen Mindestgehalt an Chrom von 10 Wo, vorzugsweise aber 12 Wo und mehr auf. In der DT-PS 1 458 359 ist ein Stahl mit <0,03 % C, <0,03 % N, <0,2 % Si, < 0,2 % Mn, 10 bis 13 % Cr, 2 bis 12 Co, 1 bis6 Wo Mo und/oder W, 5, 0 bis 8,0 % Ni, 0, 1 bis 1,0 % Ti, Ta, Al oder Nb einzeln oder zu mehreren und mit weiteren geringeren Zusätzen von Zr, Cer oder Ca, B, Cu, Be und/oder V und Rest Eisen bekannt.The rust-resistant ones developed to improve this property chromium-containing martensite-hardening steels have a minimum chromium content of 10 weeks, but preferably 12 weeks and more. In DT-PS 1 458 359 there is a steel with <0.03% C, <0.03% N, <0.2% Si, <0.2% Mn, 10 to 13% Cr, 2 to 12 Co, 1 to 6 Wo Mo and / or W, 5, 0 to 8.0% Ni, 0.1 to 1.0% Ti, Ta, Al or Nb individually or in groups and with other minor additions of Zr, Cer or Ca, B, Cu, Be and / or V and the remainder iron are known.
In der US-PS 2 750 283 ist ein Stahl mit weit gefaßter Grenzanalyze von 0 bis 1,5 % C, 0 bis 0,5 Wo N, 10 bis 35 Wo Cr, 0 bis 50 Wo Ni, 0 bis 20 % Mn, 0 bis 5 % Si, 0 bis 50 Wo Co, 0 bis 10 Wo Mo, 0 bis 10 Wo Cu, 0 bis 5 % Al, 0 bis 5 Wo Nb, Ta, V, Zr und Ti, 5 bis 80 Won B und Rest Eisen angegeben worden.In US Pat. No. 2,750,283 there is a steel with a broad limit analysis from 0 to 1.5% C, 0 to 0.5 wk N, 10 to 35 wk Cr, 0 to 50 wk Ni, 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 Where Nb, Ta, V, Zr and Ti, 5 to 80 won B and the remainder iron have been given.
Die Begrenzung des Chromgehaltes auf mindestens 10 Wo beruht auf der bisher allgemein vertretenen Meinung, daß rd. 12 % Chrom im Stahl vorhanden sein müssen, um überhaupt eine gewisse Korrosionsbeständigkeit erreichen zu können.The limitation of the chromium content to at least 10 weeks is based on the up to now generally held opinion that around 12% chromium is present in steel must in order to be able to achieve a certain level of corrosion resistance at all.
Der Erfindung lag die Aufgabe zugrunde, einen Stahl zu schaffen, der gleich gute oder bessere Eigenschaften aufweist wie vergleichbare bekannte Stähle. Insbesondere sollte der Stahl mindestens die gleich guten Korrosionseigenschaften des bekannten rostbeständigen Bau stahls mit 12 % Chrom vor allem gegenüber chloridhaltigen Medien, wie Meerwasser, aufweisen aber bessere mechanische Eigenschaften, insbesondere Zähigkeit besitzen.The invention was based on the object to provide a steel that has the same or better properties as comparable known steels. In particular, the steel should at least have the same good corrosion properties the well-known rust-resistant construction steel with 12% chromium, especially compared to chloride-containing ones Media such as sea water, however, have better mechanical properties, in particular Possess tenacity.
Zur Lösung dieser Aufgabe wird gemäß der Erfindung ein martensitaushärtender Stahl mit hoher Festigkeit, großer Zähigkeit und guter Korrosionsbeständigkeit vorgeschlagen, der die Zusammensetzung gemäß Anspruch 1 aufweist.To solve this problem, a martensite-hardening one is used according to the invention Suggested steel with high strength, great toughness and good corrosion resistance, comprising the composition of claim 1.
Bevorzugt wird ein Stahl, der aus der Zusammensetzung des Anspruchs 2 besteht.Preferred is a steel from the composition of the claim 2 exists.
Eine weitere bevorzugte Zusammensetzung des erfindungsgemäßen Stahls ist gekennzeichnet durch des Analyse des Anspruchs 3.Another preferred composition of the steel according to the invention is characterized by the analysis of claim 3.
Der erfindungsgemäße Stahl hat dem Lösungsglühen bei Temperaturen im Bereich von 800 bis 1150°C mit anschließender Auslagerung bei Temperaturen zwischen 400 und 550°C eine 0,2-Grenze von mindestens 1300 N/mm in Verbindung mit einer Bruchzähgikeit (KIc-Wert von mindestens 3300 N mm mm / . Der KIscc-Wert ist mindestens 2000 N mm 3/2, der Stahl besitzt also eine ausgezeichnete Spannungsrißkorrosionsbeständigkeit in chloridhaltigen Medien, wie Meerwasser.The steel according to the invention has solution heat treatment at temperatures in the range from 800 to 1150 ° C with subsequent aging at temperatures between 400 and 550 ° C a 0.2 limit of at least 1300 N / mm in connection with a fracture toughness (KIc value of at least 3300 N mm mm /. The KIscc value is at least 2000 N mm 3/2, so the steel has excellent resistance to stress corrosion cracking in media containing chloride, such as seawater.
Der erfindungsgemäße Stahl eignet sich daher als Baustahl für Flugzeug- und Schiffsbau bzw. Marinezwecke oder allgemein für Gegenstände, die hohe Festigkeit, Zähigkeit und Korrosionsbeständigkeit aufweisen müssen.The steel according to the invention is therefore suitable as structural steel for aircraft and shipbuilding or marine purposes or in general for objects that require high strength, Must have toughness and corrosion resistance.
Der erfindungsgemäße Stahl untt rscheidet sich von dem aus der DT-PS 1 458 359 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 liegt. The steel according to the invention differs from that from the DT-PS 1 458 359 known high-strength structural steel by an average of 3% lower Chromium content, but surprisingly has the same good corrosion and strength properties this well-known steel, but surpasses it considerably in toughness, which is almost twice as high.
In den folgenden Beispielen werden die Eigenschaften erfindungsgemäßer Stähle angegeben: 1. Beispiel: Stahl mit: 0, 03 % C, 9,13 % Cr, 2, 0 % Mo, 10,3 % Ni, 3,4 4 % Co, 0, 8 % Ti. In the following examples the properties become more according to the invention Steels specified: 1st example: Steel with: 0.03% C, 9.13% Cr, 2.0% Mo, 10.3 % Ni, 3.4, 4% Co, 0.8% Ti.
Wärmebehandlung: 835 0C 1 Wasser + 835°C 1 h/Wasser + 480 0C 6 h/Luft A. Festigkeitskennwerte bei Raumtemperatur (Längsproben aus 70 mm Vierkantstäben) Rpo,2 Rm (Rmk3m0) Ar Z Kerbschlag- KIC-Wert arbeit in J N#mm-3/2 N/mm² N/mm² N/mm² % % (ISO-V-Probe) (nach ASTM) E 399-70 T) 1500 1565 2620 11,0 63 80 4000 Die ermitteln Zähigkeitskennwert liegen für einen Stahl mit einer 0,2-Grenze von 1500 N/mm² sehr hoch.Heat treatment: 835 0C 1 water + 835 ° C 1 h / water + 480 0C 6 h / air A. Strength parameters at room temperature (longitudinal samples from 70 mm square bars) Rpo, 2 Rm (Rmk3m0) Ar Z Notched impact KIC value work in J N # mm-3/2 N / mm² N / mm² N / mm² %% (ISO-V sample) (according to ASTM) E 399-70 T) 1500 1565 2620 11.0 63 80 4000 the determine the toughness value for a steel with a 0.2 limit of 1500 N / mm² very high.
B. Korrosionseigenschaften Dauertauchversuche in Schwitzwasser (DIN 500017) und in 3 % NaCl-Lösung: keine Rostbildung ist nach über 2000 h Versuchsdauer festgestellt worden (Bild 1).B. Corrosion properties Long-term immersion tests in condensation water (DIN 500017) and in 3% NaCl solution: there is no rust formation after a test duration of more than 2000 h has been established (Fig. 1).
Zur Kennzeichnung der Spannungsrißkorrosionsbeständigkeit wurden bruchmechanische Untersuchungen in 3 Z NaCl-Lösung gepuffert auf pH 7 durchgeführt. Dabei ist die Spannungsintensität bei der kein kritisches Rißwachstum erfolgt, also der KI -Wert (scc = stress corrosion cracking), ermittelt scc worden. Die Versuchsdauer wurde auf 3oo h beschränkt. An dem erfindungsmäßen Stahl ist ein KI scc -Wert von rd. To identify the resistance to stress corrosion cracking, Fracture mechanical investigations carried out in 3 Z NaCl solution, buffered to pH 7. This is the stress intensity at which no critical crack growth occurs, i.e. the KI value (scc = stress corrosion cracking), determined by scc. The duration of the experiment was limited to 300 hours. The steel according to the invention has a KI scc value of approx.
2600 N#mm ermittelt worden, der auf die geringe Spannungsrißkorrosionsempfindlichkeit dieses Stahles hinweist. 2600 N # mm, which is due to the low sensitivity to stress corrosion cracking this steel indicates.
Zudem sind Stromdichte-Potential-Kurven in 3 % NaCl-Lösung gepuffert auf pH 7 potentiokinetisch mit 50 mV/h Vorschub gefahren worden, um die Lochfraßbeständigkeit zu ermitteln. In addition, current density-potential curves are buffered in 3% NaCl solution to pH 7 potentiokinetically with a feed rate of 50 mV / h to ensure pitting resistance to investigate.
Es ist ein Durchbruchspotential von rd. 450 mVEH gemessen werden Da das Ruhepotential des Stahles in diesen Korrosionsmedium um rd. 300 mVEH liegt, läßt das höhere Durchbruchspotential erkennen, daß der Stahl eine gewisse Beständigkeit gegen Lochkorrosion aufweist. There is a breakthrough potential of around 450 mVEH to be measured Since the rest potential of the steel in this corrosion medium is around 300 mVEH, reveals the higher breakthrough potential that the steel has a certain resistance has against pitting corrosion.
Im Salz sprühtest nach DIN 50 u2 f weist der erfindungsgemäße Stahl ein besseres Korrosionsverhalten auf als der bekannte 18/8 CrNi-Stahl 2. Beispiel: Stahl mit: o,oo7 % G, 9,8 % Cr, 6,o % Mo, 8,8 S Ni, 2,0 % Co, 0,7 % Ti. In the salt spray test according to DIN 50 u2 f, the steel according to the invention exhibits a better corrosion behavior than the well-known 18/8 CrNi steel 2. Example: Steel with: o, oo7% G, 9.8% Cr, 6, o% Mo, 8.8 S Ni, 2.0% Co, 0.7% Ti.
Wärmebehandlung: lloo°C 1 h/Wasser + 1000°C 1 h/Wasser + 480°C 15 h/Luft.Heat treatment: lloo ° C 1 h / water + 1000 ° C 1 h / water + 480 ° C 15 h / air.
A. Festigkeitskennwerte: (Längsproben aus 40 mm Vierkantstäben) Rp0,2 Rm Rmk A5 Z Kerbschlagarbeit N/mm2 N/mm2 (αk#3,0) in J N/mm # # (13ß-, 11000) 1710 1800 2050 7,5 38 15 B. Korrosionseigenschaften: Lochfraßpotential in 3 % NaCl-Lösung gepuffert auf pH 7: 44o mVEH (Ruhepotential 350 mVEH).A. Strength characteristics: (longitudinal samples from 40 mm square bars) Rp0.2 Rm Rmk A5 Z Impact work N / mm2 N / mm2 (αk # 3.0) in J N / mm # # (13ß-, 11000) 1710 1800 2050 7.5 38 15 B. Corrosion properties: Pitting corrosion potential in 3% NaCl solution buffered to pH 7: 44o mVEH (resting potential 350 mVEH).
Spannungsrißkorrosion (geprüft an gekerbten Zugproben (αk # 3,0) in künstlichem Meerwasser) Beanspruchung Laufdauer 1640 N/mm2 ca. 9oo h (9o % der o,2-Grenze) Dieses Beispiel zeigt, daß durch die Erhöhung des Molybdängehaltes die Zugfestigkeit auf 1800 N/mm2 gesteigert wird. Stress corrosion cracking (tested on notched tensile specimens (αk # 3.0) in artificial sea water) load running time 1640 N / mm2 approx. 9oo h (9o % of the o, 2 limit) This example shows that by increasing the molybdenum content the tensile strength is increased to 1800 N / mm2.
Das Lochfraßpotential und die lange Laufdauer des Spannungsrißkorrosionsversuches verdeutlichen die günstigen Korrosionseigenschaften dieses Stahles. The pitting potential and the long duration of the stress corrosion cracking test illustrate the favorable corrosion properties of this steel.
L e e r s e i t eL e r s e i t e
Claims (1)
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 true DE2744047A1 (en) | 1979-04-19 |
| DE2744047C2 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) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007910A1 (en) * | 1997-08-06 | 1999-02-18 | Crs Holdings, Inc. | High-strength, notch-ductile precipitation-hardening stainless steel alloy |
| 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 |
| EP1848836A4 (en) * | 2005-01-25 | 2011-01-05 | Questek Innovations Llc | MARTENSITIC STAINLESS STEEL CURED BY NI3TI PHASE PRECIPITATION? |
| RU2738033C1 (en) * | 2020-03-26 | 2020-12-07 | Общество с ограниченной ответственностью "Лаборатория специальной металлургии" | Martensite-aging steel |
| WO2021173976A1 (en) * | 2020-02-26 | 2021-09-02 | Crs Holdings, Inc. | High fracture toughness, high strength, precipitation hardenable stainless steel |
Citations (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
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB988452A (en) * | 1962-07-25 | 1965-04-07 | Mini Of Aviat London | Stainless steel |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007910A1 (en) * | 1997-08-06 | 1999-02-18 | Crs Holdings, Inc. | High-strength, notch-ductile precipitation-hardening stainless steel alloy |
| 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 |
| EP1848836A4 (en) * | 2005-01-25 | 2011-01-05 | Questek Innovations Llc | MARTENSITIC STAINLESS STEEL CURED BY NI3TI PHASE PRECIPITATION? |
| WO2021173976A1 (en) * | 2020-02-26 | 2021-09-02 | Crs Holdings, Inc. | High fracture toughness, high strength, precipitation hardenable stainless steel |
| US11702714B2 (en) | 2020-02-26 | 2023-07-18 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2744047C2 (en) | 1984-04-05 |
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