US3717455A - Stainless ferrite-austenitic steel - Google Patents
Stainless ferrite-austenitic steel Download PDFInfo
- Publication number
- US3717455A US3717455A US00011777A US3717455DA US3717455A US 3717455 A US3717455 A US 3717455A US 00011777 A US00011777 A US 00011777A US 3717455D A US3717455D A US 3717455DA US 3717455 A US3717455 A US 3717455A
- Authority
- US
- United States
- Prior art keywords
- steel
- titanium
- quotient
- total
- austenitic 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract description 42
- 239000010959 steel Substances 0.000 title abstract description 42
- 239000010936 titanium Substances 0.000 abstract description 34
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 24
- 229910052719 titanium Inorganic materials 0.000 abstract description 24
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 3
- 150000003609 titanium compounds Chemical class 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 239000010955 niobium Substances 0.000 description 11
- 229910052758 niobium Inorganic materials 0.000 description 9
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 9
- 238000007792 addition Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- YTPZWYPLOCEZIX-UHFFFAOYSA-N [Nb]#[Nb] Chemical compound [Nb]#[Nb] YTPZWYPLOCEZIX-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- CFJRGWXELQQLSA-UHFFFAOYSA-N azanylidyneniobium Chemical compound [Nb]#N CFJRGWXELQQLSA-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 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
Definitions
- the present invention relates to a stainless fern'ticaustenitic steel.
- Applicants US. patent application 823,744 describes the manufacture of a stainless ferritic-austenitic steel which is highly resistant to intercrystalline corrosion, the special characteristic features of the process being the addition of niobium (columbium) to a stainless ferritic austenitic steel in such quantities that the quotient Nb /C amounts to at least 8, Nb being the total niobium content minus the amount of niobium used to bind the nitrogen present in the steel to niobium nitride and C is the total carbon content of the steel.
- the process of the present invention is mainly characterized in that the niobium addition taught by patent application Ser. No. 823,744 is replaced by a titanium addition, this change being efiected in a manner whereby the quotient Ti C amounts to at least 4, wherewith Ti is the total titanium content minus the amount of titanium consumed in binding the nitrogen found in the steel to titanium nitride.
- titanium has a much greater affinity to oxygen than has niobium, it cannot be ignored that a certain amount of titanium will be consumed in forming titanium dioxide.
- the aforementioned total quantity of titanium thus represents the titanium content after subtraction of the amount of titanium consumed in forming titanium dioxide.
- compositions of the sample alloys are shown in Table 1.
- Tlrest has in this instance been calculated as the total Ti content oi the steel minus the amount of titanium needed to bind the nitrogen tound in the steel to titanium nitride.
- the actual Tina/C ratio is smaller, since TiOl occurs in alloys 3, 4 and 5.
- the present invention relates to the discovery that the niobium addition taught by US. patent application Ser. No. 823,744 can be replaced by an addition of titanium.
- weight Weight weight 1 A stainless ferritic-austenitic steel having a high Steel loss Type 0! ss Type loss Type of resistance to intercrystalline corrosion, consisting essen- No. (percent) attack (percent) attack (percent) attack tiany of:
- steel 1 which corre- Nickel sponds to steel manufactured in accordance with SIS Molybdenum 2324 and to which no niobium or titanium was added, was the victim of strong intercrystalline corrosion after titanium in such an amount that the fraction Ti /C only five minutes, which resulted in a considerable loss is atleast 4 and not greater than 20, Ti being defined in Weight Steels 3 and Of which Steels 3 and 4 have as total titanium less the sum of the titanium required relatively low additions of titanium, Show after a y for the binding of the nitrogen present in the steel and tune of fiv hours y high 105565 111 Weight Caused by the titanium used in forming any titanium oxide, and C intercrystalline corrosion.
- the amount of titanium added to steel 5 was larger, which means that a quotient Ti /C was obtained which was considerably higher than that referring to the total carbon content of the steel, with the balance iron.
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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Soft Magnetic Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE222869 | 1969-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3717455A true US3717455A (en) | 1973-02-20 |
Family
ID=20259584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00011777A Expired - Lifetime US3717455A (en) | 1969-02-18 | 1970-02-16 | Stainless ferrite-austenitic steel |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3717455A (enrdf_load_stackoverflow) |
| BE (1) | BE746157A (enrdf_load_stackoverflow) |
| CA (1) | CA937427A (enrdf_load_stackoverflow) |
| DE (1) | DE2007101A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2035548A5 (enrdf_load_stackoverflow) |
| GB (1) | GB1258723A (enrdf_load_stackoverflow) |
| NL (1) | NL7002076A (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937646A (en) * | 1973-11-29 | 1976-02-10 | Hooker Chemicals & Plastics Corporation | Evaporation apparatus of special material |
| US4060389A (en) * | 1975-01-10 | 1977-11-29 | Toyo Soda Manufacturing Co., Ltd. | Apparatus for use in the ammonia soda process or the ammonium chloride soda process |
| US4127428A (en) * | 1975-08-02 | 1978-11-28 | Japan Gasoline Co., Ltd. | Stainless cast alloy steel for use at low temperatures |
| US5196073A (en) * | 1992-04-01 | 1993-03-23 | Avesta Aktiebolag | Stainless steel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4158606A (en) | 1977-01-27 | 1979-06-19 | The United States Department Of Energy | Austenitic stainless steel alloys having improved resistance to fast neutron-induced swelling |
| JPS59150067A (ja) * | 1983-02-15 | 1984-08-28 | Jgc Corp | 耐食性に優れた極低温用ステンレス鋳鋼 |
-
1970
- 1970-02-13 NL NL7002076A patent/NL7002076A/xx unknown
- 1970-02-16 US US00011777A patent/US3717455A/en not_active Expired - Lifetime
- 1970-02-17 FR FR7005649A patent/FR2035548A5/fr not_active Expired
- 1970-02-17 GB GB1258723D patent/GB1258723A/en not_active Expired
- 1970-02-17 DE DE19702007101 patent/DE2007101A1/de active Pending
- 1970-02-18 BE BE746157D patent/BE746157A/xx unknown
- 1970-02-18 CA CA075162A patent/CA937427A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937646A (en) * | 1973-11-29 | 1976-02-10 | Hooker Chemicals & Plastics Corporation | Evaporation apparatus of special material |
| US4060389A (en) * | 1975-01-10 | 1977-11-29 | Toyo Soda Manufacturing Co., Ltd. | Apparatus for use in the ammonia soda process or the ammonium chloride soda process |
| US4127428A (en) * | 1975-08-02 | 1978-11-28 | Japan Gasoline Co., Ltd. | Stainless cast alloy steel for use at low temperatures |
| US5196073A (en) * | 1992-04-01 | 1993-03-23 | Avesta Aktiebolag | Stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| BE746157A (fr) | 1970-07-31 |
| NL7002076A (enrdf_load_stackoverflow) | 1970-08-20 |
| CA937427A (en) | 1973-11-27 |
| DE2007101A1 (de) | 1971-01-21 |
| FR2035548A5 (enrdf_load_stackoverflow) | 1970-12-18 |
| GB1258723A (enrdf_load_stackoverflow) | 1971-12-30 |
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