EP0917595A1 - Hochleistungsschweissgeeigneter weichmagnetischer stahl und seine verwendung für teile von magnetschwebebahnen - Google Patents
Hochleistungsschweissgeeigneter weichmagnetischer stahl und seine verwendung für teile von magnetschwebebahnenInfo
- Publication number
- EP0917595A1 EP0917595A1 EP97935569A EP97935569A EP0917595A1 EP 0917595 A1 EP0917595 A1 EP 0917595A1 EP 97935569 A EP97935569 A EP 97935569A EP 97935569 A EP97935569 A EP 97935569A EP 0917595 A1 EP0917595 A1 EP 0917595A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- titanium
- steel
- welding
- nitrogen
- soft magnetic
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
- E01B25/305—Rails or supporting constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/08—Sliding or levitation systems
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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 invention relates to a high-performance weldable soft magnetic steel with high toughness in the heat affected zone of welded joints, high specific electrical resistance to reduce eddy currents, aging resistance and weather resistance and its use for parts of magnetic levitation trains that take up load, guiding or driving forces, especially side guide rails.
- the thermal stress on the base material creates a coarse-grained structure in a narrow zone next to the melting line, which leads to an impairment of the toughness properties.
- the size of the grain and the width of the coarse grain zone are influenced by the distance energy during welding. As the track energy increases, the grain is enlarged and the impact energy is consequently worsened. Since on the one hand the cost-effectiveness of welding is increased with increasing distance energy, and on the other hand a high toughness of the heat affected zone is sought for component safety, there is a great need for steels that can be welded in the heat affected zone with high distance energy without permissible toughness losses, Thyssen Techn. Reports, Issue 1/85, pp. 42-49.
- Nitrides, carbides and carbonitrides of niobium and titanium as well as aluminum nitrides prevent the growth of the austenite grains by hindering the grain boundary movement. With the thermal stress that occurs during welding, however, most precipitates dissolve and become ineffective. Only titanium nitride is able to withstand temperatures up to 1400 ° C. The effect of titanium nitrides on hindering austenite grain growth depends on their quantity, size and distribution. The dispersion of the titanium nitrides is influenced by the content of titanium and nitrogen and by the cooling conditions of the steel after casting.
- Fine titanium nitride precipitates with a particle size of less than 0.020 ⁇ m arise with titanium contents of less than 0.03% and a titanium-nitrogen ratio of 2 to 3.4. Under this condition, the most effective obstacle to austenite grain growth during welding is achieved.
- the present invention is based on the object of proposing a soft magnetic steel which can be processed on the one hand without sacrificing toughness by high-performance welding with high path energy and on the other hand fulfills the requirements with regard to high specific electrical resistance, aging resistance and weather resistance. According to the invention, this object is achieved by a steel having the following chemical composition (in% by mass)
- This steel preferably has the following composition:
- the steel according to the invention solves the task. On the one hand, it fulfills the analytical requirements required for high-performance welding, and on the other hand it meets the stringent requirements, for example for a material for supporting and guiding parts of magnetic levitation trains, with regard to high specific electrical resistance, aging resistance and weather resistance.
- a soft magnetic steel of similar composition is known from DE 30 09 234 C2, which, however, is not suitable for high-performance welding, i.e. H. Welding with high energy is suitable.
- High track energy is of particular economic interest in the processing of these steels by welding, particularly in the long travel of the magnetic levitation railway, because of the high welding speed.
- the steel according to the invention is produced by casting, rolling, normalizing or by normalizing rolling and accelerated cooling.
- the titanium content of the steel according to the invention is preferably from 0.01 to 0.02% and the nitrogen content from 0.005 to 0.008% with a titanium: nitrogen ratio of preferably 2.0 to 4.0 fixed. Under this condition, the most effective hindrance to austenite grain growth is achieved when welding with high heat input.
- the inventive alloying of a soft magnetic steel with titanium combines the above-described improvement in weldability with a high electrical resistance in a unique combination.
- the high electrical resistance represents a low energy consumption when operating the Magnetic levitation safely by minimizing eddy current losses.
- the steel according to the invention can be processed considerably more economically and, due to its excellent electrical properties, causes low eddy current losses under operating conditions.
- the steel according to the invention is outstandingly suitable for parts of magnetic levitation trains that have to absorb load, guiding or driving forces, such as side guide rails.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Transportation (AREA)
- Soft Magnetic Materials (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Railway Tracks (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19632370 | 1996-08-10 | ||
DE19632370A DE19632370C2 (de) | 1996-08-10 | 1996-08-10 | Hochleistungsschweißgeeigneter weichmagnetischer Stahl und seine Verwendung für Teile von Magnetschwebebahnen |
PCT/EP1997/004245 WO1998006882A1 (de) | 1996-08-10 | 1997-08-05 | Hochleistungsschweissgeeigneter weichmagnetischer stahl und seine verwendung für teile von magnetschwebebahnen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0917595A1 true EP0917595A1 (de) | 1999-05-26 |
EP0917595B1 EP0917595B1 (de) | 2001-06-13 |
Family
ID=7802356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97935569A Expired - Lifetime EP0917595B1 (de) | 1996-08-10 | 1997-08-05 | Hochleistungsschweissgeeigneter weichmagnetischer stahl und seine verwendung für teile von magnetschwebebahnen |
Country Status (16)
Country | Link |
---|---|
US (1) | US6287395B1 (de) |
EP (1) | EP0917595B1 (de) |
JP (1) | JP2000517376A (de) |
KR (1) | KR100438996B1 (de) |
CN (1) | CN1072274C (de) |
AT (1) | ATE202157T1 (de) |
AU (1) | AU709094B2 (de) |
CA (1) | CA2262845C (de) |
DE (2) | DE19632370C2 (de) |
DK (1) | DK0917595T3 (de) |
ES (1) | ES2159873T3 (de) |
GR (1) | GR3036398T3 (de) |
HK (1) | HK1021650A1 (de) |
PT (1) | PT917595E (de) |
WO (1) | WO1998006882A1 (de) |
ZA (1) | ZA977118B (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100072376A (ko) * | 2002-05-08 | 2010-06-30 | 에이케이 스틸 프로퍼티즈 인코포레이티드 | 무방향성 전기 강판의 연속 주조방법 |
US20050000596A1 (en) * | 2003-05-14 | 2005-01-06 | Ak Properties Inc. | Method for production of non-oriented electrical steel strip |
CN1329548C (zh) * | 2004-04-27 | 2007-08-01 | 宝山钢铁股份有限公司 | 低温韧性优良的软磁结构钢板及制造方法 |
CN100352963C (zh) * | 2005-06-30 | 2007-12-05 | 宝山钢铁股份有限公司 | 耐盐雾腐蚀的软磁结构钢及其制造方法 |
CN100447285C (zh) * | 2006-03-27 | 2008-12-31 | 宝山钢铁股份有限公司 | 焊接工艺性优良的软磁结构钢板及其制造方法 |
CA2781529C (en) | 2009-09-23 | 2017-10-24 | Indu Javeri | Methods for the preparation of liposomes comprising docetaxel |
US20210196932A1 (en) | 2016-02-08 | 2021-07-01 | Orbusneich Medical, Inc. | Drug Eluting Balloon |
CN108982130A (zh) * | 2018-07-23 | 2018-12-11 | 中国重型机械研究院股份公司 | 一种高速磁悬浮列车制动系统试验台 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529620A (en) * | 1975-07-15 | 1977-01-25 | Nippon Steel Corp | Low alloy steel having excellent stress relieving temper brittleness a t parts affected by welding heat |
JPS5257011A (en) * | 1975-11-07 | 1977-05-11 | Nippon Steel Corp | Material for welding of low susceptibility to weld crack and the proce ss for production |
DE3009234C2 (de) * | 1980-03-11 | 1983-01-05 | Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg | Verwendung eines weichmagnetischen Stahls für Teile von Magnetschwebebahnen |
US4388122A (en) * | 1980-08-11 | 1983-06-14 | Kabushiki Kaisha Kobe Seiko Sho | Method of making high strength hot rolled steel sheet having excellent flash butt weldability, fatigue characteristic and formability |
JPS5861219A (ja) * | 1981-09-28 | 1983-04-12 | Nippon Steel Corp | 耐遅れ破壊性にすぐれた高張力強靭鋼 |
JPS62255321A (ja) * | 1986-04-30 | 1987-11-07 | Nippon Kokan Kk <Nkk> | 原料ロ−ダに取り付けられたバケツトホイ−ルの位置決め方法 |
KR0157540B1 (ko) * | 1993-08-04 | 1998-11-16 | 미노루 다나까 | 용접부의 피로강도와 용접성이 뛰어난 고장력강 및 그 제조방법 |
JPH0841582A (ja) * | 1994-07-29 | 1996-02-13 | Nippon Steel Corp | 大入熱溶接部靱性の優れた低合金耐熱鋼 |
-
1996
- 1996-08-10 DE DE19632370A patent/DE19632370C2/de not_active Expired - Fee Related
-
1997
- 1997-08-05 AU AU38511/97A patent/AU709094B2/en not_active Ceased
- 1997-08-05 DE DE59703811T patent/DE59703811D1/de not_active Expired - Lifetime
- 1997-08-05 KR KR10-1999-7000831A patent/KR100438996B1/ko not_active IP Right Cessation
- 1997-08-05 EP EP97935569A patent/EP0917595B1/de not_active Expired - Lifetime
- 1997-08-05 WO PCT/EP1997/004245 patent/WO1998006882A1/de active IP Right Grant
- 1997-08-05 CA CA002262845A patent/CA2262845C/en not_active Expired - Fee Related
- 1997-08-05 CN CN97197182A patent/CN1072274C/zh not_active Ceased
- 1997-08-05 ES ES97935569T patent/ES2159873T3/es not_active Expired - Lifetime
- 1997-08-05 JP JP10509354A patent/JP2000517376A/ja active Pending
- 1997-08-05 PT PT97935569T patent/PT917595E/pt unknown
- 1997-08-05 DK DK97935569T patent/DK0917595T3/da active
- 1997-08-05 AT AT97935569T patent/ATE202157T1/de not_active IP Right Cessation
- 1997-08-05 US US09/230,102 patent/US6287395B1/en not_active Expired - Fee Related
- 1997-08-08 ZA ZA9707118A patent/ZA977118B/xx unknown
-
2000
- 2000-02-02 HK HK00100634A patent/HK1021650A1/xx not_active IP Right Cessation
-
2001
- 2001-08-16 GR GR20010401254T patent/GR3036398T3/el not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9806882A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998006882A1 (de) | 1998-02-19 |
ES2159873T3 (es) | 2001-10-16 |
DE59703811D1 (de) | 2001-07-19 |
CA2262845C (en) | 2004-12-14 |
KR20000029728A (ko) | 2000-05-25 |
GR3036398T3 (en) | 2001-11-30 |
ATE202157T1 (de) | 2001-06-15 |
EP0917595B1 (de) | 2001-06-13 |
ZA977118B (en) | 1998-04-16 |
AU709094B2 (en) | 1999-08-19 |
US6287395B1 (en) | 2001-09-11 |
JP2000517376A (ja) | 2000-12-26 |
AU3851197A (en) | 1998-03-06 |
HK1021650A1 (en) | 2000-06-23 |
DE19632370C2 (de) | 1998-07-02 |
DE19632370A1 (de) | 1998-02-12 |
KR100438996B1 (ko) | 2004-07-03 |
CA2262845A1 (en) | 1998-02-19 |
CN1072274C (zh) | 2001-10-03 |
DK0917595T3 (da) | 2001-09-17 |
CN1227613A (zh) | 1999-09-01 |
PT917595E (pt) | 2001-10-30 |
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