EP0388283B1 - Acier inoxydable ferritique et procédé pour l'élaboration d'un tel acier - Google Patents

Acier inoxydable ferritique et procédé pour l'élaboration d'un tel acier Download PDF

Info

Publication number: EP0388283B1
Authority: EP; European Patent Office
Prior art keywords: less; steel; titanium; niobium; nickel
Prior art date: 1989-03-16
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

Application number

EP90400666A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0388283A1 (fr

Inventor

Pierre Bourgain

Jean-Claude Bavay

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Ugine SA

Original Assignee

Ugine SA

Priority date (The priority date 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 date listed.)

1989-03-16

Filing date

1990-03-13

Publication date

1994-12-28

1990-03-13 Application filed by Ugine SA filed Critical Ugine SA

1990-09-19 Publication of EP0388283A1 publication Critical patent/EP0388283A1/fr

1994-12-28 Application granted granted Critical

1994-12-28 Publication of EP0388283B1 publication Critical patent/EP0388283B1/fr

2010-03-13 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
239000010959 steel Substances 0.000 title claims abstract description 32
238000000034 method Methods 0.000 title claims abstract description 11
230000008569 process Effects 0.000 title claims abstract description 11
238000004519 manufacturing process Methods 0.000 title abstract description 11
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 81
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 46
239000010936 titanium Substances 0.000 claims abstract description 46
239000011651 chromium Substances 0.000 claims abstract description 42
229910052759 nickel Inorganic materials 0.000 claims abstract description 42
229910052719 titanium Inorganic materials 0.000 claims abstract description 42
229910052804 chromium Inorganic materials 0.000 claims abstract description 41
229910052750 molybdenum Inorganic materials 0.000 claims abstract description 39
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 38
239000010955 niobium Substances 0.000 claims abstract description 38
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 37
229910052758 niobium Inorganic materials 0.000 claims abstract description 36
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 35
229910052757 nitrogen Inorganic materials 0.000 claims abstract description 34
229910052799 carbon Inorganic materials 0.000 claims abstract description 33
239000011733 molybdenum Substances 0.000 claims abstract description 32
230000007797 corrosion Effects 0.000 claims abstract description 31
238000005260 corrosion Methods 0.000 claims abstract description 31
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 30
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
229910052802 copper Inorganic materials 0.000 claims abstract description 26
239000010949 copper Substances 0.000 claims abstract description 26
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
238000005097 cold rolling Methods 0.000 claims abstract description 9
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
239000000126 substance Substances 0.000 claims abstract description 7
229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 4
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 4
239000011575 calcium Substances 0.000 claims abstract description 4
229910052791 calcium Inorganic materials 0.000 claims abstract description 4
229910052742 iron Inorganic materials 0.000 claims abstract description 4
239000000463 material Substances 0.000 claims abstract description 4
230000007935 neutral effect Effects 0.000 claims abstract description 4
ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 3
239000004411 aluminium Substances 0.000 claims abstract description 3
229910052796 boron Inorganic materials 0.000 claims abstract description 3
239000012535 impurity Substances 0.000 claims abstract description 3
239000011777 magnesium Substances 0.000 claims abstract description 3
229910052749 magnesium Inorganic materials 0.000 claims abstract description 3
229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 3
150000002910 rare earth metals Chemical class 0.000 claims abstract description 3
229910052710 silicon Inorganic materials 0.000 claims abstract description 3
239000010703 silicon Substances 0.000 claims abstract description 3
238000000137 annealing Methods 0.000 claims description 13
239000000203 mixture Substances 0.000 claims description 6
238000002360 preparation method Methods 0.000 claims description 5
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
238000001816 cooling Methods 0.000 claims description 3
230000004927 fusion Effects 0.000 claims description 3
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
230000002378 acidificating effect Effects 0.000 claims description 2
230000035939 shock Effects 0.000 claims description 2
229910052748 manganese Inorganic materials 0.000 claims 1
239000011572 manganese Substances 0.000 claims 1
229910001220 stainless steel Inorganic materials 0.000 abstract description 29
238000010438 heat treatment Methods 0.000 abstract description 5
239000002253 acid Substances 0.000 abstract description 3
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 abstract description 2
239000000654 additive Substances 0.000 abstract 1
238000003303 reheating Methods 0.000 abstract 1
229910045601 alloy Inorganic materials 0.000 description 24
239000000956 alloy Substances 0.000 description 24
238000007792 addition Methods 0.000 description 22
238000010586 diagram Methods 0.000 description 18
238000001556 precipitation Methods 0.000 description 13
230000015572 biosynthetic process Effects 0.000 description 7
230000009931 harmful effect Effects 0.000 description 5
230000006872 improvement Effects 0.000 description 5
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
230000000694 effects Effects 0.000 description 4
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
230000009286 beneficial effect Effects 0.000 description 3
230000015556 catabolic process Effects 0.000 description 3
238000006731 degradation reaction Methods 0.000 description 3
230000009467 reduction Effects 0.000 description 3
230000007704 transition Effects 0.000 description 3
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
238000003466 welding Methods 0.000 description 3
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
230000002349 favourable effect Effects 0.000 description 2
238000005098 hot rolling Methods 0.000 description 2
239000000243 solution Substances 0.000 description 2
239000010935 stainless steel Substances 0.000 description 2
229910052726 zirconium Inorganic materials 0.000 description 2
ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
240000008042 Zea mays Species 0.000 description 1
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
150000007513 acids Chemical class 0.000 description 1
230000009471 action Effects 0.000 description 1
238000005275 alloying Methods 0.000 description 1
CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 1
230000005587 bubbling Effects 0.000 description 1
235000019994 cava Nutrition 0.000 description 1
OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 1
238000010276 construction Methods 0.000 description 1
238000009749 continuous casting Methods 0.000 description 1
230000001934 delay Effects 0.000 description 1
230000003111 delayed effect Effects 0.000 description 1
230000001627 detrimental effect Effects 0.000 description 1
-1 du bore Chemical compound 0.000 description 1
230000007062 hydrolysis Effects 0.000 description 1
238000006460 hydrolysis reaction Methods 0.000 description 1
238000007654 immersion Methods 0.000 description 1
230000006698 induction Effects 0.000 description 1
230000005764 inhibitory process Effects 0.000 description 1
150000004767 nitrides Chemical class 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
230000020477 pH reduction Effects 0.000 description 1
239000002245 particle Substances 0.000 description 1
230000000750 progressive effect Effects 0.000 description 1
238000007670 refining Methods 0.000 description 1
230000009919 sequestration Effects 0.000 description 1
239000011780 sodium chloride Substances 0.000 description 1
239000006104 solid solution Substances 0.000 description 1
238000007669 thermal treatment Methods 0.000 description 1
MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
230000002747 voluntary effect Effects 0.000 description 1
230000003313 weakening effect Effects 0.000 description 1
230000004580 weight loss Effects 0.000 description 1
229910000859 α-Fe Inorganic materials 0.000 description 1

Images

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
- C22C38/22—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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper

Definitions

the present invention relates to a ferritic stainless steel very resistant to corrosion in a neutral or weakly acidic chlorinated medium and more particularly suitable for the manufacture of heat exchangers for industry, in particular those cooled by brackish water and water from sea.
the present invention also relates to a process for the preparation of such a steel.
FR-A-2,377,457 discloses a ferritic steel with chromium nickel molybdenum resistant to corrosion and containing in particular from 18 to 32% of chromium, from 0.1 to 6% of molybdenum, from 0.5 to 5% nickel and not more than 3% copper.
the examples of steel described in this document relate to steels containing 1.99 to 2.15% molybdenum. Furthermore, it is specified, on page 9 lines 27 to 32, that the steels having the best alloy compositions are those containing 28% chromium, 2% molybdenum and 4% nickel, as well as those containing 20% chromium , 5% molybdenum and 2% nickel, because they have sufficient structural stability and can be produced economically on an industrial scale.
FR-A-2,352,893 is a ferritic stainless steel containing from 0.01 to 0.025% by weight of carbon, from 0.005 to 0.025% by weight of nitrogen, from 20 to 30% by weight of chromium , 3 to 5% molybdenum, 3.2 to 4.8% nickel, 0.1 to 1% copper, 0.2 to 0.7% titanium and / or 0.2 to 1% niobium.
This document claims more particularly a high nickel content of between 3.2 to 4.8% associated with a limitation of the copper content of between 0.1 to 1% to obtain the temperature ambient high ductility values.
FR-A-2,473,069 also discloses an iron-based ferritic stainless steel containing up to 0.08% by weight of carbon, up to 0.060% by weight of nitrogen, from 25 to 35% in weight of chromium, from 3.60 to 5.60% by weight of molybdenum, up to 2% by weight of nickel, up to 2% by weight of titanium, niobium and zirconium according to the following equation: % Ti / 6 +% Zr / 7 +% cb / 8>% C +% N
FR-A-2,473,068 discloses a ferritic stainless steel which has the same composition as the preceding steel, but whose nickel content by weight is between 2 and 5%.
nickel is an expensive element which accelerates the formation of embrittling intermetallic phases and reduces the resistance to cavernous corrosion in chlorinated medium.
the present invention therefore relates to a ferritic stainless steel in which the addition of copper is limited to a value between 0.5 to 2% by weight so as to reinforce the impact resistance of the alloy while reducing the speed for the formation of hard and embrittling intermetallic phases of the sigma and chi type which can form during heat treatments for manufacturing welding.
the steel contains less than 0.010% of carbon and less than 0.015% of nitrogen, the sum of the carbon and of the nitrogen being less than 0.025%.
the invention also relates to a process for the production of a ferritic stainless steel from which a steel strip is formed which is hot rolled, characterized in that the hot rolled steel strip is subjected annealing at a temperature between 900 and 1200 ° C., then the steel strip is subjected to a first cold rolling followed by an intermediate annealing at a temperature between 900 and 1200 ° C. and finally the steel strip is subjected to a second cold rolling followed by a final annealing at a temperature between 900 and 1200 ° C.
the examples which led to the present invention were obtained from 30 kg ingots produced in the vacuum induction furnace. Slabs from these ingots were heated between 1100 and 1250 ° C for hot rolling to a thickness of 5 mm.
the hot-rolled strips are then annealed between 1000 and 1200 ° C followed by cold rolling to a thickness of 2 millimeters. After this cold rolling, annealing on the order of 20 s to 5 min is carried out continuously at a temperature between 900 and 1200 ° C.
Additional cold rolling makes it possible to obtain strips of a thickness of 0.8 millimeters which then undergo a final annealing of the order of 20 s to 5 min and at a temperature between 900 and 1200 ° C.
Molybdenum is a much more efficient alloying element than chromium because a Mo / Cr equivalent coefficient equal to 3.3 is generally accepted to qualify the improvement in resistance to pitting corrosion due to the action of molybdenum.
the increase in the chromium content also accelerates the precipitation of the embrittling phases as shown in the diagram in Figure 2.
the curves shown in this diagram show the influence of the holding time at 900 ° C on the elongation A% to rupture at room temperature of an experimental alloy at 29Cr 4Mo 4Ni Ti and 25Cr 4Mo 4Ni Ti.
the alloy with approximately 25% chromium, 4% molybdenum, 4% nickel and 0.5% titanium does not exhibit brittleness when cold between 0 and -50 ° C. unlike the alloy containing approximately 29 % of chromium, 4% of molybdenum, 4% of nickel and 0.5% of titanium as it appears on the diagram of figure 5 which shows the evolution of the resistance to the impact rupture according to the temperature and the chromium content.
the alloy according to the present invention contains no voluntary addition of nickel which is considered to be an element residual. This absence of a significant amount of nickel allows the adoption of high chromium contents greater than 28.5% and molybdenum greater than 3.5% necessary for obtaining optimal resistance to cavernous and pitting corrosion.
ferritic stainless steel containing titanium and niobium for ferritic stainless steel containing titanium and niobium.
up to 3% copper and preferably 0.5 to 2% copper are added to the steel, which according to this patent increases the resistance to corrosion in non-oxidizing acids, and in particular in hot sulfuric acid solutions.
the results reveal that copper does not cause any improvement in the resistance to corrosion in chlorinated media. weakly acid analogous to corrosive media that form in caves.
This diagram shows the corrosion rates (mm / year) deducted from the weight losses observed after 24 hours of immersion in NaCl 2M-0.2M HCl medium deaerated by nitrogen bubbling, at the temperature of 30 ° C respectively for the alloys 6 and 7 of Table 1 above.
0.5 to 2% of copper is added to ferritic stainless steel with a high chromium and molybdenum content and containing titanium or niobium.
the diagram in FIG. 7, the curves of which show the influence of 1% of copper on impact resistance, indicates that the addition of approximately 1% of copper to an alloy containing approximately 29% of chromium, 4% of molybdenum and 0.5% of titanium results in a decrease of the order of 20 ° C in the transition temperature between the brittle state characterized by very low breaking energies and the ductile state corresponding to high breaking energies . This results in a very significant improvement in the impact resistance of the alloy due to the addition of copper.
an alloy of 0.018% carbon, 0.027% nitrogen, 28.90% chromium, 3.75% molybdenum, 0.035% nickel and 0.56% titanium only has an elongation at break of 6% at room temperature while an alloy of 0.03% carbon, 0.010% nitrogen, 28.90% chromium, 3.97% molybdenum, 0.041% nickel and 0.21% titanium has an elongation at break of 26%.
the present invention voluntarily excludes the addition of nickel, which is an expensive element and which accelerates the formation of embrittling intermetallic phases and reduces the resistance to cavernous corrosion in chlorinated medium.
ferritic stainless steels according to the present invention are all the more resistant to shocks and have structural stability in the range between 650 and 1000 ° C, the higher the lower the contents of C, N, Ti and Nb.
the contents of titanium and / or niobium to be added must be equal to the minimum necessary to fix carbon and nitrogen and take into account the fact that titanium and / or niobium solid solution in ferrite do not participate in the sequestration of carbon and nitrogen.
the titanium content must satisfy the following equation: % Ti> 0.10 + 4x (% C) + 3.4 x (% N) and in particular to the equation: % Ti> 0.15 + 4 x (% C) + 3.4 x (% N) so that the resistance to intergranular corrosion is optimal.
the coefficients 4 and 3,4 logically follow the approximate values of the atomic masses of titanium (48), carbon (12) and nitrogen (14) as well as the formulas of titanium carbide and titanium nitride, respectively TiC and TiN.
the atomic mass of niobium being taken equal to 93 grams.
the addition of copper is limited to less than 2%, the precipitation of copper-rich particles resulting in a significant degradation of hot forgeability when the copper content is greater than 2%.
An addition of aluminum to the ferritic stainless steel according to the present application can be added during the preparation for deoxidation purposes.
the ferritic alloy according to the present invention is particularly suitable for the use in the form of sheets and strips whose thickness may be greater than that generally used in practice (less than one mm) for a steel.
ferritic stainless with the same chromium and molybdenum content containing titanium or niobium.
the stainless steel described by the present invention is particularly intended for the manufacture of welded tubes for heat exchangers conveying chlorinated water. It can, for example, be produced by the steel, electrical, AOD and / or vacuum refining, continuous casting and hot rolling on strip train industry.

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Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Heat Treatment Of Sheet Steel (AREA)
Heat Treatment Of Steel (AREA)
Treatment Of Steel In Its Molten State (AREA)
Preventing Corrosion Or Incrustation Of Metals (AREA)

EP90400666A 1989-03-16 1990-03-13 Acier inoxydable ferritique et procédé pour l'élaboration d'un tel acier Expired - Lifetime EP0388283B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR8903472		1989-03-16
FR8903472A FR2644478B1 (ko)	1989-03-16	1989-03-16

Publications (2)

Publication Number	Publication Date
EP0388283A1 EP0388283A1 (fr)	1990-09-19
EP0388283B1 true EP0388283B1 (fr)	1994-12-28

Family

ID=9379766

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP90400666A Expired - Lifetime EP0388283B1 (fr)	1989-03-16	1990-03-13	Acier inoxydable ferritique et procédé pour l'élaboration d'un tel acier

Country Status (11)

Country	Link
US (1)	US5230752A (ko)
EP (1)	EP0388283B1 (ko)
JP (1)	JPH04504140A (ko)
AT (1)	ATE116379T1 (ko)
AU (1)	AU5289090A (ko)
CA (1)	CA2050315C (ko)
DE (1)	DE69015394T2 (ko)
DK (1)	DK0388283T3 (ko)
ES (1)	ES2069035T3 (ko)
FR (1)	FR2644478B1 (ko)
WO (1)	WO1990010723A1 (ko)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5824265A (en) *	1996-04-24	1998-10-20	J & L Fiber Services, Inc.	Stainless steel alloy for pulp refiner plate
US7842434B2 (en) *	2005-06-15	2010-11-30	Ati Properties, Inc.	Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US8158057B2 (en) *	2005-06-15	2012-04-17	Ati Properties, Inc.	Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US7981561B2 (en) *	2005-06-15	2011-07-19	Ati Properties, Inc.	Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
EP1797212A4 (en) *	2004-09-16	2012-04-04	Vladimir Belashchenko	DEPOSIT SYSTEM, METHODS AND MATERIALS FOR COMPOSITE COATINGS
UA111115C2 (uk)	2012-04-02	2016-03-25	Ейкей Стіл Пропертіс, Інк.	Рентабельна феритна нержавіюча сталь
WO2014103728A1 (ja) *	2012-12-27	2014-07-03	昭和電工株式会社	成膜装置
US10883160B2 (en)	2018-02-23	2021-01-05	Ut-Battelle, Llc	Corrosion and creep resistant high Cr FeCrAl alloys
CN115572898B (zh) *	2022-09-23	2023-12-01	成都先进金属材料产业技术研究院股份有限公司	一种高铬铁素体不锈钢的制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB465999A (en) *	1935-09-16	1937-05-20	Stahlwerke Roechling Buderus	Improvements in articles that are subjected to and must resist attack by solutions containing free chlorine or hypochlorous acid, its salts and solutions thereof
FR2091642A5 (en) *	1970-05-16	1972-01-14	Nippon Steel Corp	Stainless steel resistant to pitting corrosion -and suitable for comp - used in sewater
JPS50109809A (ko) *	1974-02-07	1975-08-29
CA1184402A (en) *	1980-04-11	1985-03-26	Sumitomo Metal Industries, Ltd.	Ferritic stainless steel having good corrosion resistance
DE3169748D1 (en) *	1981-01-16	1985-05-09	Allegheny Ludlum Steel	Low interstitial, corrosion resistant, weldable ferritic stainless steel and process for the manufacture thereof

1989
- 1989-03-16 FR FR8903472A patent/FR2644478B1/fr not_active Expired - Fee Related
1990
- 1990-03-13 DK DK90400666.5T patent/DK0388283T3/da active
- 1990-03-13 EP EP90400666A patent/EP0388283B1/fr not_active Expired - Lifetime
- 1990-03-13 CA CA002050315A patent/CA2050315C/fr not_active Expired - Fee Related
- 1990-03-13 ES ES90400666T patent/ES2069035T3/es not_active Expired - Lifetime
- 1990-03-13 US US07/761,924 patent/US5230752A/en not_active Expired - Fee Related
- 1990-03-13 AU AU52890/90A patent/AU5289090A/en not_active Abandoned
- 1990-03-13 JP JP2504953A patent/JPH04504140A/ja active Pending
- 1990-03-13 DE DE69015394T patent/DE69015394T2/de not_active Expired - Fee Related
- 1990-03-13 WO PCT/FR1990/000169 patent/WO1990010723A1/fr active Application Filing
- 1990-03-13 AT AT90400666T patent/ATE116379T1/de not_active IP Right Cessation

Also Published As

Publication number	Publication date
AU5289090A (en)	1990-10-09
JPH04504140A (ja)	1992-07-23
ES2069035T3 (es)	1995-05-01
DE69015394D1 (de)	1995-02-09
ATE116379T1 (de)	1995-01-15
WO1990010723A1 (fr)	1990-09-20
CA2050315C (fr)	1999-04-27
DK0388283T3 (da)	1995-04-03
US5230752A (en)	1993-07-27
FR2644478A1 (ko)	1990-09-21
DE69015394T2 (de)	1995-08-17
FR2644478B1 (ko)	1993-10-15
EP0388283A1 (fr)	1990-09-19

Legal Events

Date	Code	Title	Description
1990-08-04	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-09-19	17P	Request for examination filed	Effective date: 19900728
1990-09-19	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE
1992-08-26	17Q	First examination report despatched	Effective date: 19920710
1993-09-10	ITF	It: translation for a ep patent filed	Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.
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