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WO1996000311A2 - Acier pour roues de vehicules sur rails, de preference pour roues de vehicules de chemins de fer - Google Patents

Acier pour roues de vehicules sur rails, de preference pour roues de vehicules de chemins de fer Download PDF

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Publication number
WO1996000311A2
WO1996000311A2 PCT/CZ1995/000013 CZ9500013W WO9600311A2 WO 1996000311 A2 WO1996000311 A2 WO 1996000311A2 CZ 9500013 W CZ9500013 W CZ 9500013W WO 9600311 A2 WO9600311 A2 WO 9600311A2
Authority
WO
WIPO (PCT)
Prior art keywords
weight
steel
temperature
hours
vehicle wheels
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.)
Ceased
Application number
PCT/CZ1995/000013
Other languages
German (de)
English (en)
Other versions
WO1996000311A3 (fr
Inventor
Jir^¿í JUREC^¿EK
Rudolf Faja
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.)
ZDB AS
Original Assignee
ZDB AS
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.)
Filing date
Publication date
Application filed by ZDB AS filed Critical ZDB AS
Publication of WO1996000311A2 publication Critical patent/WO1996000311A2/fr
Publication of WO1996000311A3 publication Critical patent/WO1996000311A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Definitions

  • the solution relates to the chemical composition of the steel for rail vehicles, preferably for the wheel tires of the railway wheels and the subsequent heat processing of this steel, whereby the required mechanical and metallographic properties of the end product are achieved.
  • the individual steel grades must meet the requirements set in this area by the international regulations.
  • the wheel tires of rail vehicles have so far been produced from steels which, in addition to iron, contain 0.60% to 0.65% by weight of carbon, 0.80% by weight of manganese, 0.40% by weight of silicon, 0.030% by weight of phosphorus, 0.030 % By weight of sulfur, 0.30% by weight of chromium, 0.30% by weight of nickel, 0.30% by weight of copper, 0.080% by weight of molybdenum and 0.080% by weight of vanadium, all details permitting the maximum Show content of individual elements.
  • the method of heat treatment depends on the carbon and manganese content in the steel.
  • the hardening temperature is 870 ° C
  • the cooling time in the water is between 110 and 220 seconds
  • the tempering takes 4 to 5 hours at a temperature between 490 and 510 ° C.
  • This steel has a strength limit between 920 and 1050 MPa, minimum ductility 12% and notch toughness 10 J.
  • a disadvantage of these heat-treated steels used hitherto is that they have a steep gradient in the mechanical and metallographic properties because of their low hardenability. For example, the difference between the material hardnesses 5 mm and 35 mm deep below the surface is 45 to 50 HB.
  • the properties of the steels previously used are already unsatisfactory.
  • the material crumbles from the outer circumference of the wheel tire, which causes the material to fatigue. Mechanical abrasion of the wheels is great. The material tends to break and the life of the part and operational safety are shortened.
  • a steel which essentially consists in that, apart from iron, it contains 0.58 to 0.65% by weight of the carbon, 0.75 to 0.90 ww% of manganese, 0.25 to 0.40 ww% of silicon, maximum 0.008 ww% of phosphorus, maximum 0.005 ww% of sulfur, 0.10 to 0.20 ww% of nickel, 0.90 to 1.10 ww% of chromium, 0.070 to 0.150 ww% of molybdenum, 0.070 to 0.120 ww% of vanadium, minimally 0.014 ww% of aluminum and which is so heat-treated that it is heated to a temperature between 800 and 815 ° C cooled for 4 to 5 hours and kept at this temperature for 2 hours for 120 to 150 seconds in the circulating water at a temperature of 50 to 70 ° C.
  • the specific method of heat treating the steel depends on the specific chemical composition, in particular on the carbon, manganese, chromium, molybdenum and vanad content.
  • the resulting microstructure is formed by bainite and partly by eutectoid pearlite.
  • An advantage of this steel is its mechanical and metallographic properties, which increase the contact fatigue of the material and resistance to consumption, but at the same time do not increase the tendency of the material to break. This increases both the life of the parts and the safety of the whole device where the wheels are used. These advantageous properties are determined by the homogeneity of the structure between the material surface and the center of the material. For example, the difference in hardness in the 5 mm and 35 mm depths below the surface is a maximum of 20 HB. The yield point is 75 to 80% of the strength limit, which is dependent on the carbon content in the steel and the heat treatment.
  • the strength limit reaches the values from 900 to 1000 MPa and with a carbon content of 0.60 to 0.65 Gw% the values from 980 to 1080 MPa, whereby the notched toughness is always at least 20 J and the elongation at break is at least 14%.
  • An example of the invention is a steel which, in addition to iron, contains 0.64% by weight of carbon, 0.81% by weight of manganese, 0.38% by weight of silicon, 0.008% by weight of phosphorus, 0.005% by weight of sulfur, 12% by weight of nickel, 1.08% by weight of chromium, 0.08% by weight of molybdenum, 0.11% by weight of vanad, 0.018% by weight of aluminum.
  • This steel is heat-treated so that after heating for 4 hours at the temperature of 800 ° C. and maintaining this temperature for 2 hours, the steel is cooled in the circulating water at 50 ° C. for 150 seconds and then for 4 hours at the temperature of 650 ° C. tempered and finally cooled down at a rate of 50 ° C per hour.
  • This steel has the resulting strength limit 1036 MPa, yield strength 815 MPa, the elongation at break 16%, notch toughness 21 J and the difference in hardness in the 5 mm and 35 mm depths below the surface is 8 HB.
  • the next embodiment is a steel which, in addition to iron, contains 0.60% by weight of carbon, 0.85% by weight of manganese, 0.38% by weight of silicon, 0.008% by weight of phosphorus, 0.005% by weight of sulfur, 0.12% by weight of nickel, 0.95 ww% of chromium, 0.11 % By weight of molybdenum, 0.09% by weight of vanad, 0.014% by weight of aluminum.
  • the steel is heat treated so that after heating for 4.5 hours at 810 ° C and after reaching this temperature for 2 hours, the steel is cooled in circulating water at 60 ° C for 120 seconds and then for 4 hours at temperature Start at 640 * C and then cool down at 50 "C per hour.
  • This steel has the resulting strength limit 990 MPa, yield strength 780 MPa, elongation at break 16%, notch toughness 22 J and difference in hardness in the 5 mm and 35 mm depths below the surface is 10 HB.
  • the heat-treated steel of the chemical composition specified above according to the invention is suitable for the production of the wheels of the rail vehicles, preferably for the wheel tires of the railroad wheels, that is to say on the part of the wheels which comes into contact with rails.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'acier utilisé pour produire des roues de véhicules sur rails, de préférence des roues de véhicules de chemins de fer, contient outre le fer 0,58 à 0,65 % en poids de carbone, 0,75 à 0,90 % en poids de manganèse, 0,25 à 0,40 % en poids de silicium, au maximum 0,008 % en poids de phosphore, au maximum 0,005 % en poids de soufre, 0,10 à 0,20 % en poids de nickel, 0,90 à 1,10 % en poids de chrome, 0,070 à 0,150 % en poids de molybdène, 0,070 à 0,120 % en poids de vanadium, au minimum 0,014 % en poids d'aluminium. Cet acier est thermiquement traité, étant premièrement chauffé jusqu'à une température comprise entre 800 et 815 °C pendant 4 à 5 heures, maintenu à cette température pendant 2 heures, puis refroidi pendant 120 à 150 secondes dans de l'eau en circulation à une température comprise entre 50 et 70 °C. On le laisse ensuite revenir pendant 4 à 4,5 heures à une température comprise entre 630 et 650 °C et on le refroidit définitivement à une vitesse de 50 °C par heure.
PCT/CZ1995/000013 1994-06-27 1995-06-26 Acier pour roues de vehicules sur rails, de preference pour roues de vehicules de chemins de fer Ceased WO1996000311A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV1568-94 1994-06-27
CZ941568A CZ156894A3 (en) 1994-06-27 1994-06-27 Steel for railway vehicle wheels, particularly for railway wheel tyres

Publications (2)

Publication Number Publication Date
WO1996000311A2 true WO1996000311A2 (fr) 1996-01-04
WO1996000311A3 WO1996000311A3 (fr) 1996-02-22

Family

ID=5463479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ1995/000013 Ceased WO1996000311A2 (fr) 1994-06-27 1995-06-26 Acier pour roues de vehicules sur rails, de preference pour roues de vehicules de chemins de fer

Country Status (2)

Country Link
CZ (1) CZ156894A3 (fr)
WO (1) WO1996000311A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344470A2 (fr) 2002-03-16 2003-09-17 Geka Brush Gmbh Brosse à mascara
WO2017199079A1 (fr) * 2016-05-19 2017-11-23 Rail 1520 Ip Ltd Acier pour la production de roues ferroviaires
CN111270154A (zh) * 2020-04-08 2020-06-12 马鞍山钢铁股份有限公司 一种适用于高寒地区货车的中碳车轮钢及利用其生产车轮的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6783610B2 (en) * 2001-03-05 2004-08-31 Amsted Industries Incorporated Railway wheel alloy

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH648600A5 (de) * 1981-03-13 1985-03-29 Schweizerische Lokomotiv Gegenstaende mit erhoehter bestaendigkeit gegen oberflaechenbeschaedigung durch abroll- und/oder reibungsvorgaenge.
US4364772A (en) * 1981-05-28 1982-12-21 Titanium Metals Corporation Of America Rail wheel alloy
JPS6299438A (ja) * 1985-10-24 1987-05-08 Nippon Kokan Kk <Nkk> 不安定破壊伝播停止能力を有する耐摩耗性高性能レ−ル
US4895605A (en) * 1988-08-19 1990-01-23 Algoma Steel Corporation Method for the manufacture of hardened railroad rails
JPH0617193A (ja) * 1990-07-30 1994-01-25 Burlington Northern Railroad Co 高強度・耐損傷レ−ル及びその製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1344470A2 (fr) 2002-03-16 2003-09-17 Geka Brush Gmbh Brosse à mascara
WO2017199079A1 (fr) * 2016-05-19 2017-11-23 Rail 1520 Ip Ltd Acier pour la production de roues ferroviaires
CN111270154A (zh) * 2020-04-08 2020-06-12 马鞍山钢铁股份有限公司 一种适用于高寒地区货车的中碳车轮钢及利用其生产车轮的方法

Also Published As

Publication number Publication date
WO1996000311A3 (fr) 1996-02-22
CZ156894A3 (en) 1996-01-17

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