EP0593000B1 - Schienenstahl - Google Patents
Schienenstahl Download PDFInfo
- Publication number
- EP0593000B1 EP0593000B1 EP93116474A EP93116474A EP0593000B1 EP 0593000 B1 EP0593000 B1 EP 0593000B1 EP 93116474 A EP93116474 A EP 93116474A EP 93116474 A EP93116474 A EP 93116474A EP 0593000 B1 EP0593000 B1 EP 0593000B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tellurium
- rails
- sulphur
- steels
- less
- 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
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S148/00—Metal treatment
- Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics
- Y10S148/906—Roller bearing element
Definitions
- the invention relates to the use of steels for rails, wheel handlebars and rolling railroad stuff like wheel disks, Wheel tires and solid wheels.
- Such steels are known with different compositions; they must be weldable and, due to the high dynamic loads in the wheel / rail system, require a high yield strength, tensile strength and fatigue strength, break resistance and structural strength.
- rail steels must have a high resistance to wear due to the high stress caused by friction.
- the service life of rails is essentially determined by the wear resistance and the initial wear volume in the rail head, given the same mechanical stress. Under otherwise identical conditions, the wear resistance of rails with higher strength increases.
- the strengths of 1,100 or 1,200 N / mm 2 that can be achieved today are at the expense of toughness, weldability and break resistance.
- the known steels normally unalloyed or alloyed with small amounts of manganese, chromium, vanadium and molybdenum, are used in the rolled state, ie without heat treatment; they have a pearlitic or ferritic-pearlitic structure which adjusts when cooled in air and are described in "Draft European Rails Standard", Part 1, Edition December 1991 and March 1993 and contain 0.60 to 0.82% carbon, 0.13 to 0.60% silicon, 0.66 to 1.30% manganese, on average 0.02 to 0.03% phosphorus and 0.008 to 0.030% sulfur, the rest iron including impurities.
- the tensile strength of these steels is at least 800 to 1,130 N / mm 2 .
- JP-A-62 205 218 also includes steels containing tellurium; thus the US patent 4 404 047 describes in the context of a low-alloy process for heat treatment Steels with 0.042 or 0.045% tellurium without the roll of the tellurium. Furthermore are from the German Offenlegungsschriften 29 37 908, 30 09 491 and 30 18 537 free cutting steels etc. with up to 0.6% carbon, up to 0.5% or up to 2.5% silicon, up to 2.0% manganese, 0.003 up to 0.04% or up to 0.40% sulfur and up to 0.03% tellurium known to also contain significant amounts of alloying agents can contain. The tellurium is used here for improvement cold formability.
- the invention lies on the basis of this prior art the problem underlying a steel with improved Wear resistance as well as increased tear resistance and Toughness without impairment of weldability to use as rails, wheel handlebars and rolling railway equipment.
- the solution to this task is based on the knowledge that the transverse properties not only in the case of rail steels, i.e. the technological properties across the rolling direction, a decisive influence on the lifespan exercise. This is based on the finding that under a wear stress material particles in Detach transverse direction, crack formation and crack growth for fatigue damage, for example shelling, in Longitudinal direction, but the fatigue strength is decisive in the transverse direction.
- the invention shows a way how to deal with simple metallurgical Measures the transverse properties of rail steels can be significantly improved.
- tellurium is heat resistant
- the sulfides increase, which increases in the presence of tellurium do not stretch when thermoformed, but their spherical elliptical Maintain shape. Accordingly these sulfides have a much lower notch effect out than with the usual, when hot rolling in Rolling direction stretching sulfides. The consequence of this is not only better wear behavior, but also an improvement in the mechanical transverse properties, without the suitability for welding suffering.
- the low sulfur content comes next to that a special effect of tellurium on the sulfides Importance as when the wear resistance decreasing sulfur content significantly improved.
- the sulfur content was increased from usually about 0.022 to 0.052% for a rail steel of quality 900A.
- the composition of the standard steel 900A is shown in Table I below.
- the rails in question were laid in a curve with a radius of 570m. After a load of approximately 92 x 10 6 t, the edge wear was measured; it was 3.5mm for the rails made of quality 900A with the usual sulfur content and 6mm for quality 900A with the above-mentioned increased sulfur content.
- the accompanying diagram in FIG. 1 contains an evaluation of the test results.
- the thickly drawn arrow line and point A illustrate the curve wear depending on the tensile strength in the strength range from 700 to 1,350 N / mm 2 for radii from 300 to 350 m from previous studies.
- the point entered in the diagram in FIG. 1 on the dashed straight line is representative of the usual rail steel 900A, while the cross shows the position of the test steel with the sulfur content increased to 0.052%.
- the thinly drawn, vertical line indicates the wear of the test curve mentioned above. This wear behavior corresponds to rail steel quality 700 with its usual sulfur content.
- the wear resistance can be increased by 50% and more with the addition of tellurium.
- the specific surface wear was 200 mm 2 for a track curve with a curve radius of 350 m per 100 ⁇ 10 6 t load, but only 120 mm 2 for a tellurium-containing steel.
- Table III shows how the mechanical properties can be improved with the help of a limitation of the sulfur content and additionally with a tellurium addition of only 0.002%. This is particularly evident in the transverse properties and the elongation and contraction at break, which are of particular importance in view of the relatively high tensile strength.
- the steel in any case has better transverse properties, in particular better tear strength, elongation at break and constriction and accordingly an increased resistance to longitudinal cracks in the rail web.
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)
- Rod-Shaped Construction Members (AREA)
Description
C | Si | Mn | P | S | Al | Cr | Ni | Mo | Cu | N | |
700 | 0,473 | 0,25 | 0,90 | 0,013 | 0,021 | 0,002 | 0,16 | 0,05 | 0,03 | 0,08 | 0,0062 |
800 | 0,541 | 0,16 | 1,07 | 0,011 | 0,002 | 0,002 | 0,09 | 0,04 | 0,03 | 0,07 | 0,0050 |
900A | 0,678 | 0,23 | 1,20 | 0,019 | 0,019 | 0,002 | 0,18 | 0,05 | 0,04 | 0,07 | 0,0050 |
Gehalte in % |
Claims (8)
- Verwendung eines Stahls, bestehend aus bis 0,82% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis Tellur/Schwefel von 0,1 bis 0,6 sowie fakultativ 0,10 bis 0,50% Silizium, 1,30 bis 1,70% Mangan, 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls, bestehend aus 0,6 bis 0,8% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis von Tellur/Schwefel von 0,1 bis 0,6, bis 0,50% Silizium, 0,80 bis 1,30% Mangan und höchstens 0,05% Phosphor und fakultativ 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls, bestehend aus 0,5 bis 0,75% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis von Tellur/Schwefel von 0,1 bis 0,6, 0,10 bis 0,50% Silizium, 1,30 bis 1,70% Mangan und höchstens 0,05% Phosphor und fakultativ 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls, bestehend aus 0,60 bis 0,80% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis von Tellur/Schwefel von 0,1 bis 0,6, 0,60 bis 1,20% Silizium, 0,80 bis 1,30% Mangan, höchstens 0,030% Phosphor und 0,70 bis 1,20% Chrom und fakultativ 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls, bestehend aus 0,70 bis 0,80% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis von Tellur/Schwefel von 0,1 bis 0,6, 0,80 bis 1,20% Silizium, 0,80 bis 1,30% Mangan, höchstens 0,030% Phosphor, 0,80 bis 1,20% Chrom, bis 0,25% Titan und/oder Vanadium und fakultativ 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls, bestehend aus 0,53 bis 0,62% Kohlenstoff, bis 0,004% Tellur und bis 0,007% Schwefel bei einem Verhältnis von Tellur/Schwefel von 0,1 bis 0,6, 0,65 bis 1,1% Mangan, 0,8 bis 1,3% Chrom, 0,1 bis 0,6% Silizium, je 0,05 bis 0,11% Molybdän und Vanadium sowie unter 0,02% Phosphor und fakultativ 0,01 bis 0,025% oder unter 0,004% Aluminium, Rest Eisen einschließlich erschmelzungsbedingter Verunreinigungen als Werkstoff für Schienen, Radlenker und rollendes Eisenbahnzeug.
- Verwendung eines Stahls nach Anspruch 1 mit höchstens 0,05% Phosphor.
- Verwendung eines Stahls nach einem der Ansprüche 1 bis 7 mit unter 0,0015% Sauerstoff.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4234815 | 1992-10-15 | ||
DE4234815 | 1992-10-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0593000A1 EP0593000A1 (de) | 1994-04-20 |
EP0593000B1 true EP0593000B1 (de) | 1998-03-25 |
Family
ID=6470563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93116474A Expired - Lifetime EP0593000B1 (de) | 1992-10-15 | 1993-10-12 | Schienenstahl |
Country Status (5)
Country | Link |
---|---|
US (1) | US5711914A (de) |
EP (1) | EP0593000B1 (de) |
AT (1) | ATE164397T1 (de) |
DE (1) | DE59308302D1 (de) |
ES (1) | ES2116381T3 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4444426A1 (de) * | 1994-12-14 | 1996-06-27 | Gft Gleistechnik Gmbh | Radreifen-Stahl |
US6372057B1 (en) | 2000-06-01 | 2002-04-16 | Sumitomo Metal Industries, Inc. | Steel alloy railway wheels |
US20110189047A1 (en) * | 2010-02-02 | 2011-08-04 | Transportation Technology Center, Inc. | Railroad rail steels resistant to rolling contact fatigue |
CN104946844B (zh) * | 2015-07-20 | 2017-03-01 | 攀钢集团攀枝花钢铁研究院有限公司 | 钢轨钢的精炼方法 |
CN105063269B (zh) * | 2015-08-03 | 2017-03-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 钢轨钢的调渣方法 |
CN108546871B (zh) * | 2018-03-30 | 2020-03-31 | 鞍钢股份有限公司 | 一种核电机组一体化堆顶组件用钢及其制造方法 |
CN115747464A (zh) * | 2022-11-24 | 2023-03-07 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种中碳低锰钢轨焊接接头单频感应加热的热处理方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE393995B (sv) * | 1973-12-28 | 1977-05-31 | Stora Kopparbergs Kbergslags A | Sett vid framstellning av konstruktioner av valsat stalmaterial |
DE3009491A1 (de) * | 1979-03-14 | 1980-09-25 | Daido Steel Co Ltd | Stahl fuer das kaltschmieden und verfahren zu seiner herstellung |
JPS5946300B2 (ja) * | 1979-03-14 | 1984-11-12 | 大同特殊鋼株式会社 | 被削性にすぐれた冷間鍛造用鋼およびその製造方法 |
JPS5739163A (en) * | 1980-08-21 | 1982-03-04 | Sanyo Tokushu Seikou Kk | High carbon steel for roller bearing |
US4404047A (en) * | 1980-12-10 | 1983-09-13 | Lasalle Steel Company | Process for the improved heat treatment of steels using direct electrical resistance heating |
JPS60145362A (ja) * | 1984-01-09 | 1985-07-31 | Nippon Steel Corp | 腐食疲労特性の良好な高張力炭素鋼鋼線 |
JPS60248867A (ja) * | 1984-09-17 | 1985-12-09 | Nippon Steel Corp | 引張強度70Kg/mm↑2以上の靭性に優れたチエ−ンおよびその製造方法 |
JPS61130469A (ja) * | 1985-11-16 | 1986-06-18 | Daido Steel Co Ltd | プラスチック成形金型用鋼 |
JPS62205218A (ja) * | 1986-03-04 | 1987-09-09 | Daido Steel Co Ltd | 耐水素脆化性に優れた構造用鋼の溶製方法 |
JPS63109145A (ja) * | 1986-10-23 | 1988-05-13 | Sumitomo Metal Ind Ltd | Te添加含Ni低温用鋼 |
DE3721641C1 (de) * | 1987-07-01 | 1989-01-12 | Thyssen Stahl Ag | Verfahren zur Herstellung von Warmband |
GB2225022B (en) * | 1988-11-04 | 1993-04-14 | Nippon Seiko Kk | Rolling-part steel and rolling part employing same |
JP2730745B2 (ja) * | 1988-12-09 | 1998-03-25 | 山陽特殊製鋼株式会社 | 耐食転動部品用鋼および転動部品 |
JPH0762208B2 (ja) * | 1989-07-10 | 1995-07-05 | 住友金属工業株式会社 | 打抜き加工性にすぐれた鋼板 |
US5085733A (en) * | 1989-08-24 | 1992-02-04 | Nippon Seiko Kabushiki Kaisha | Rolling steel bearing |
JPH04154913A (ja) * | 1990-10-15 | 1992-05-27 | Sumitomo Metal Ind Ltd | 耐食性に優れた高張力ベンド管の製造方法 |
-
1993
- 1993-10-12 EP EP93116474A patent/EP0593000B1/de not_active Expired - Lifetime
- 1993-10-12 AT AT93116474T patent/ATE164397T1/de not_active IP Right Cessation
- 1993-10-12 DE DE59308302T patent/DE59308302D1/de not_active Expired - Fee Related
- 1993-10-12 ES ES93116474T patent/ES2116381T3/es not_active Expired - Lifetime
-
1994
- 1994-11-18 US US08/341,833 patent/US5711914A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2116381T3 (es) | 1998-07-16 |
EP0593000A1 (de) | 1994-04-20 |
DE59308302D1 (de) | 1998-04-30 |
ATE164397T1 (de) | 1998-04-15 |
US5711914A (en) | 1998-01-27 |
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