WO2000031312A1 - Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls - Google Patents
Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls Download PDFInfo
- Publication number
- WO2000031312A1 WO2000031312A1 PCT/EP1999/007881 EP9907881W WO0031312A1 WO 2000031312 A1 WO2000031312 A1 WO 2000031312A1 EP 9907881 W EP9907881 W EP 9907881W WO 0031312 A1 WO0031312 A1 WO 0031312A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel
- protective layer
- martensitic
- temperature
- melt
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
Definitions
- the invention relates to a method for producing a protective layer on a martensitic steel according to the first claim and the use of the steel provided with the protective layer according to the fifth claim.
- the object of the invention is to propose a further method for producing a protective layer.
- the protective layer should be suitable for martensitic steels.
- the martensitic steel provided with the protective layer is said to be usable in nuclear fusion experiments, the protective layer being a diffusion barrier layer for the radioactive hydrogen isotope tritium.
- the steel provided with the protective layer must be used in this area compared to the liquid breeding metals used here such.
- the object is achieved by the method described in the first claim and the use specified in the fifth claim. Preferred embodiments of the method are described in the remaining claims.
- a martensitic steel in particular a chrome steel, preferably with 8 to 10% chromium, or an unalloyed or alloyed spring steel is provided with the protective layer.
- the martensitic steel is placed in a protective gas atmosphere in a melt of aluminum or an aluminum alloy such as. B. 90% Al and 10% Si immersed.
- a melt of pure aluminum is preferred for use in nuclear fusion experiments.
- the inert gases argon and helium are particularly suitable as protective gases, optionally in combination with a reducing gas such as hydrogen.
- the temperature of the melt is preferably in a temperature range between the melting point and at most 100 ° C. above the melting point.
- a temperature of 700 ° C is well suited for pure aluminum.
- the dipping time should be approximately proportional to the thickness of the martensitic steel object to be coated. Diving times in the range between 5 seconds and 2 minutes are generally well suited.
- the martensitic steel is then removed from the melt and cooled under the protective gas atmosphere, preferably at a natural cooling rate, to a temperature between 100 ° C. and room temperature.
- the martensitic steel is then hot isostatically pressed at a pressure of at least 1500 bar at the austenitizing temperature (final Aci temperature).
- the austenitizing temperature for 8 to 10% chromium steels is between 1040 ° C and 1075 ° C.
- the maximum applicable pressure is generally limited to approx. 3000 bar for technical reasons.
- all martensitic components of the steel are converted into austenite.
- the holding time in hot isostatic pressing corresponds to
- % chromium steels are between 30 and 40 minutes.
- An approximately 100 to 200 ⁇ m thick protective layer is formed.
- the steel is subjected to hardening.
- the steel is quenched in a manner known per se and then tempered.
- tempering can be carried out, for example, at a temperature of 750 ° C and a holding time of 1 to 2 hours. This step restores the martensitic state with the desired ductility.
- an iron / chromium / aluminum mixed crystal layer adjoins the martensitic base body, which is approximately 100 to 200 ⁇ m thick and whose aluminum content in the areas near the surface is approximately 30%, the aluminum content in the direction of the base body decreases.
- the mixed crystal layer has essentially the same ductility as the martensitic base body.
- the surface of the protective layer is formed by an approximately 1 ⁇ m thick ceramic layer made of aluminum oxide.
- the protective layer proves to be an effective diffusion barrier against hydrogen; the tritium diffusion is reduced by a factor of approx. 1000 compared to uncoated steels.
- the protective layer is also almost inert against the corrosive attack of liquid metals.
- MANET II a development step towards a weakly activated martensitic steel
- Nuclear Research Center Düsseldorf Kfk 5060 (June 1993) deployed martensitic steel known as MANET II.
- MANET II is composed as follows:
- the surface of the steel parts to be coated was first cleaned by sandblasting. The parts were then cleaned in acetone and ethanol. In order to achieve better wettability with the aluminum melt, a flux consisting of a saturated saline solution (KC1, NaCl and asAlFe in a ratio of 5: 4: 1) was applied.
- the parts prepared in this way were dried before they were introduced into a box with a protective gas atmosphere (argon with 5% hydrogen) in which a crucible with the melt was located.
- the temperature of the pure aluminum melt was 700 ° C.
- the parts were immersed in the aluminum melt for 30 seconds and then cooled to room temperature under the protective gas atmosphere. after the steel parts coated with aluminum had cooled, they were removed from the box by a lock system.
- the parts were then placed in a HIP system.
- the plant was first evacuated and then flooded with Ar 4.8. Then the temperature and pressure were increased simultaneously until the austenitizing temperature of 1075 ° C and 3000 bar pressure was reached. After a holding time of 0.5 hours, the system was switched off, after which the parts cooled at about 10 to 20 K / min at constant pressure. This cooling rate is sufficient to ensure the formation of martensite, i.e. that is, to harden the parts.
- the subsequent tempering treatment also took place in the HIP facility. Alternatively, another oven could be used.
- the steel parts were annealed at a temperature of 750 ° C for 2 hours. Although the starting step can in principle be carried out without pressure, a pressure of 3000 bar was maintained in the HIP system during starting. The HIP system was then switched off and the steel parts cooled.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Coating By Spraying Or Casting (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99952596T ATE223976T1 (de) | 1998-11-19 | 1999-10-18 | Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls |
EP99952596A EP1133579B1 (de) | 1998-11-19 | 1999-10-18 | Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls |
JP2000584119A JP2002530536A (ja) | 1998-11-19 | 1999-10-18 | マルテンサイト鋼上に保護層を製造する方法および保護層を備えた鋼の使用 |
DE59902693T DE59902693D1 (de) | 1998-11-19 | 1999-10-18 | Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853285.7 | 1998-11-19 | ||
DE19853285A DE19853285C1 (de) | 1998-11-19 | 1998-11-19 | Verfahren zur Herstellung einer Schutzschicht auf einem martensitischen Stahl und Verwendung des mit der Schutzschicht versehenen Stahls |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000031312A1 true WO2000031312A1 (de) | 2000-06-02 |
Family
ID=7888280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/007881 WO2000031312A1 (de) | 1998-11-19 | 1999-10-18 | Verfahren zur herstellung einer schutzschicht auf einem martensitischen stahl und verwendung des mit der schutzschicht versehenen stahls |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1133579B1 (de) |
JP (1) | JP2002530536A (de) |
AT (1) | ATE223976T1 (de) |
DE (2) | DE19853285C1 (de) |
WO (1) | WO2000031312A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003041343A (ja) * | 2001-07-27 | 2003-02-13 | Nippon Steel Corp | 高強度自動車部材用アルミめっき鋼板及びこれを使用した自動車用部材 |
CN116968397A (zh) * | 2023-09-25 | 2023-10-31 | 上海核工程研究设计院股份有限公司 | 一种防氚渗透的层状复合材料及其制备方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4700263B2 (ja) * | 2003-04-25 | 2011-06-15 | 新日本製鐵株式会社 | 高圧水素ガス用タンク及び配管 |
DE102004010689B3 (de) * | 2004-02-27 | 2005-06-30 | Schott Ag | Absorber mit einer strahlungsselektiven Absorberbeschichtung und Verfahren zu seiner Herstellung |
DE102005030231B4 (de) | 2005-06-29 | 2007-05-31 | Forschungszentrum Karlsruhe Gmbh | Verfahren zum Aufbringen einer hochtemperaturgeeigneten FeCrAl-Schutzschicht, Hüllrohr mit einer derartig aufgebrachten Schutzschicht und Verwendung eines solchen Hüllrohrs |
DE102016107152B4 (de) | 2016-04-18 | 2017-11-09 | Salzgitter Flachstahl Gmbh | Bauteil aus pressformgehärtetem, auf Basis von Aluminium beschichtetem Stahlblech und Verfahren zur Herstellung eines solchen Bauteils und dessen Verwendung |
US10450668B2 (en) | 2017-04-11 | 2019-10-22 | Savannah River Nuclear Solutions, Llc | Development of a passivated stainless steel surface |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1057188A (en) * | 1964-07-20 | 1967-02-01 | Murex Welding Processes Ltd | An improved method of applying a metal coating to wires, tubes or strips |
DE3145941A1 (de) * | 1981-11-20 | 1983-06-01 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | "verfahren zur steigerung der zuverlaessigkeit eines satzes aus bauteilen, besonders turbinenschaufeln" |
JPS5950177A (ja) * | 1982-09-16 | 1984-03-23 | Kobe Steel Ltd | 密着性に優れた金属表面処理法 |
JPS61250130A (ja) * | 1985-04-26 | 1986-11-07 | Mitsubishi Motors Corp | 繊維強化複合材料の製法 |
US5447754A (en) * | 1994-04-19 | 1995-09-05 | Armco Inc. | Aluminized steel alloys containing chromium and method for producing same |
JPH08134595A (ja) * | 1994-11-11 | 1996-05-28 | Nippon Steel Corp | 耐応力腐食割れ特性に優れた高強度ステンレス鋼板 |
JPH10175081A (ja) * | 1996-12-16 | 1998-06-30 | Sumitomo Light Metal Ind Ltd | アルミニウム合金クラッド材の製造方法 |
-
1998
- 1998-11-19 DE DE19853285A patent/DE19853285C1/de not_active Expired - Fee Related
-
1999
- 1999-10-18 EP EP99952596A patent/EP1133579B1/de not_active Expired - Lifetime
- 1999-10-18 DE DE59902693T patent/DE59902693D1/de not_active Expired - Fee Related
- 1999-10-18 WO PCT/EP1999/007881 patent/WO2000031312A1/de active IP Right Grant
- 1999-10-18 JP JP2000584119A patent/JP2002530536A/ja active Pending
- 1999-10-18 AT AT99952596T patent/ATE223976T1/de not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1057188A (en) * | 1964-07-20 | 1967-02-01 | Murex Welding Processes Ltd | An improved method of applying a metal coating to wires, tubes or strips |
DE3145941A1 (de) * | 1981-11-20 | 1983-06-01 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | "verfahren zur steigerung der zuverlaessigkeit eines satzes aus bauteilen, besonders turbinenschaufeln" |
JPS5950177A (ja) * | 1982-09-16 | 1984-03-23 | Kobe Steel Ltd | 密着性に優れた金属表面処理法 |
JPS61250130A (ja) * | 1985-04-26 | 1986-11-07 | Mitsubishi Motors Corp | 繊維強化複合材料の製法 |
US5447754A (en) * | 1994-04-19 | 1995-09-05 | Armco Inc. | Aluminized steel alloys containing chromium and method for producing same |
JPH08134595A (ja) * | 1994-11-11 | 1996-05-28 | Nippon Steel Corp | 耐応力腐食割れ特性に優れた高強度ステンレス鋼板 |
JPH10175081A (ja) * | 1996-12-16 | 1998-06-30 | Sumitomo Light Metal Ind Ltd | アルミニウム合金クラッド材の製造方法 |
Non-Patent Citations (5)
Title |
---|
BENAMATI: "development of tritium permeation barriers on al base in europe", JOURNAL OF NUCLEAR MATERIALS, vol. 271&272, 1999, elsevier,nl, pages 391 - 395, XP000874316 * |
DATABASE WPI Section Ch Week 198418, Derwent World Patents Index; Class A35, AN 1984-110354, XP002129615 * |
PATENT ABSTRACTS OF JAPAN vol. 011, no. 101 (C - 413) 31 March 1987 (1987-03-31) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003041343A (ja) * | 2001-07-27 | 2003-02-13 | Nippon Steel Corp | 高強度自動車部材用アルミめっき鋼板及びこれを使用した自動車用部材 |
CN116968397A (zh) * | 2023-09-25 | 2023-10-31 | 上海核工程研究设计院股份有限公司 | 一种防氚渗透的层状复合材料及其制备方法 |
CN116968397B (zh) * | 2023-09-25 | 2023-12-15 | 上海核工程研究设计院股份有限公司 | 一种防氚渗透的层状复合材料及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1133579A1 (de) | 2001-09-19 |
ATE223976T1 (de) | 2002-09-15 |
EP1133579B1 (de) | 2002-09-11 |
DE19853285C1 (de) | 2000-06-15 |
JP2002530536A (ja) | 2002-09-17 |
DE59902693D1 (de) | 2002-10-17 |
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