US3753789A - Making cast steel railway wheels - Google Patents

Making cast steel railway wheels Download PDF

Info

Publication number
US3753789A
US3753789A US00228690A US3753789DA US3753789A US 3753789 A US3753789 A US 3753789A US 00228690 A US00228690 A US 00228690A US 3753789D A US3753789D A US 3753789DA US 3753789 A US3753789 A US 3753789A
Authority
US
United States
Prior art keywords
wheels
hub
wheel
conveyor
cooled
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
Application number
US00228690A
Other languages
English (en)
Inventor
L Sandor
W Kucera
A Wendt
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.)
Amsted Industries Inc
Original Assignee
Amsted Industries Inc
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 Amsted Industries Inc filed Critical Amsted Industries Inc
Application granted granted Critical
Publication of US3753789A publication Critical patent/US3753789A/en
Assigned to AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. reassignment AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FIRST NATIONAL BANK OF CHICAGO, AS AGENT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C21D1/84—Controlled slow cooling
    • 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

Definitions

  • ABSTRACT In the cooling of a steel railway car wheel having relatively thick hub and tread portions and a relatively thin plate portion, it is important that umdue stresses are not set up in the plate portion and, simultaneously, that the tread is hardened for good wear qualities while the hub is kept soft for easy machinability.
  • a conveyor having suspended thereover, at spaced intervals, non-metallic insulating disks having a diameter approximately equal to or slightly larger than the wheel hub diameter, moving the wheels in intermittent steps along the conveyor so that the wheels stop for a predetermined period of time directly under successive disks until the hubs have cooled from a temperature of about 1,700 F. to below the critical transformation temperature which is about 1,200 F., the other portions of the wheels having cooled at a faster rate.
  • FIGURE of the drawing is a crosssectional view of a railway car wheel on a cooling conveyor.
  • a wheel indicated generally at 10 which preferably is cast steel containing less than one percent by weight of carbon, has a central relatively thick hub 12 and a relatively thick tread l4 interconnected by a relatively thin plate 16.
  • the wheel is illustrated at that portion of the manufacturing cycle wherein, preferably, an axle hole 17 has been torch cut and the wheel is being transported on a conveyor indicated schematically at 18.
  • a method of making a cast steel railway car wheel In the preferred method of carrying out the present invention, and by way of example, there is disclosed a method of making a cast steel railway car wheel.
  • a cast steel wheel is removed from themold and cooled slowly to a temperature in the range of l,l F. to l,200 F., whereat an axle hole 17 is torch cut through the wheel hub section.
  • the axle hole may be rough cut at a later point in time or may be formed by'means of a core during the casting operation.
  • the wheel is then heated in a normalizing furnace to a temperatureof the order of 1,700 F. As the wheel emerges from the normalizing furnace, it is preferably placed upon an insulating disk 20 which is positioned on slat conveyor 18.
  • the insulating; disk is preferably of refractory fiber glass but may be any ceramic insulating material which will withstand temperatures. of up to 1,700 F., or a fibrous insulating material such as asbestos.
  • a pluralityof insulating disks 22 are suspended as by wires 24 at spaced intervals along the conveyor. Only one such disk is shown in the drawing but there may be twenty or more such disks spaced along the conveyor.
  • the material of which the suspended disks 22 are made may be a refractory fiber felt with or with out a bonding agent of colloidal silica cement, a refractory fiberglass or other refractory, non-metallic insulating material which will withstand temperatures of up to l,700 F.
  • the suspended disks may be flat, they preferably are formed with a concave under-side, for example in theshape of an inverted pie tin or dish having an outer diameter of approximately one and one half times the wheel hub diameter. This preferred size and configuration has proved to more adequately control the dissipation of heat from the entire wheel hub such that the hub cools at amuch slower rate than the tread portion 14.
  • the suspended disk shown has a wall thickness of approximately one-half inch and a height of aboutonefourth of the disk diameter.
  • the normalized wheels at a starting temperature of about 1,700 F., are moved in steps through 20 stations, the time in motion between stations being about 5 seconds and the time during which the wheels are at rest under each insulating disk is about secondsln this instance the lower rim 26 0f each disk is spaced about one-half inch above the top surface 28 of each wheel hub.
  • vsuspended insulating disks may be added or deleted along the line, or the spacing between the suspended disk and the hub face may be readily variedso as to-ensure that the wheel hubs have cooledslowly through the transformation temperature while the tread portion cooled at a faster rate because it had been completely exposed.
  • the transformation temperature will generally be approximately l,230 F. and, in practice, the hub is cooled to a temperature value within the range of at most approximately l,l50 F. to l,200 Fby the time the last suspended insulating disk in the line has been passed.
  • the wheel isthen permitted to cool to room temperature, preferably without any force cooling by jets of air or water.
  • the foregoing method results in wheels having a preferred tread hardness in the range of approximately 265-300 BIIN, and hub hardness less than about 240 BI-IN.
  • Cast steel railway wheels have been made according balance with residual impurities in ordinary amounts Iron What is claimed is: -l.
  • a method of making a steel railway wheel comprising the steps of: forming the steel while molten wto the shape of a wheel, then after the wheel has solidified cooling the wheel to a temperature value within a range of the order of l,250 F. to room temperature, then heating the wheel to a normalizing temperature value, then air cooling the wheel by placing it on a conveyor having suspended thereover at spaced intervals a plurality of non-metallic insulating disks having a diameter larger than the wheel hub diameter, then moving the wheel in intermittent steps along the conveyor and stopping the wheel for a predetermined period of time under successive disks until the wheel hubs have cooled half times the hub diameter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
US00228690A 1972-02-23 1972-02-23 Making cast steel railway wheels Expired - Lifetime US3753789A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22869072A 1972-02-23 1972-02-23

Publications (1)

Publication Number Publication Date
US3753789A true US3753789A (en) 1973-08-21

Family

ID=22858202

Family Applications (1)

Application Number Title Priority Date Filing Date
US00228690A Expired - Lifetime US3753789A (en) 1972-02-23 1972-02-23 Making cast steel railway wheels

Country Status (10)

Country Link
US (1) US3753789A (OSRAM)
AU (1) AU448168B2 (OSRAM)
CA (1) CA966397A (OSRAM)
DE (1) DE2245424C3 (OSRAM)
ES (1) ES407190A1 (OSRAM)
FR (1) FR2172951B1 (OSRAM)
GB (1) GB1355774A (OSRAM)
IT (1) IT965187B (OSRAM)
SE (1) SE395284B (OSRAM)
ZA (1) ZA725722B (OSRAM)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729802A (en) * 1986-01-16 1988-03-08 J. I. Case Company Opener-disk heat-treating process and product
US5899516A (en) * 1996-01-23 1999-05-04 Sumitomo Metal Industries, Ltd. Railway wheel and manufacturing method of the railway wheel
US5913988A (en) * 1996-03-29 1999-06-22 Valdunes Out of gauge resistant railroad wheel
US6205930B1 (en) * 1999-03-09 2001-03-27 Curt J. Waedekin Trolley wheel tread and flange
US6216362B1 (en) 2000-02-18 2001-04-17 Amsted Industries Incorporated Method and apparatus for control of the cooling rate of cast steel railway wheels

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2119841C1 (ru) * 1997-05-06 1998-10-10 Комратов Юрий Сергеевич Способ изготовления цельнокатаных железнодорожных колес из непрерывнолитых слитков

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1071012A (en) * 1912-11-19 1913-08-19 John S Unger Method of treating solids of revolution.
US1859623A (en) * 1930-06-25 1932-05-24 Bonney Floyd Co Cast steel body and method of hardening same
US3043317A (en) * 1959-12-10 1962-07-10 Amsted Ind Inc Wheel hub cooling arrangement
US3370993A (en) * 1965-03-18 1968-02-27 Babcock & Wilcox Co Heat treatment of metals
US3558367A (en) * 1967-10-18 1971-01-26 Amsted Ind Inc Wheel cooling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1071012A (en) * 1912-11-19 1913-08-19 John S Unger Method of treating solids of revolution.
US1859623A (en) * 1930-06-25 1932-05-24 Bonney Floyd Co Cast steel body and method of hardening same
US3043317A (en) * 1959-12-10 1962-07-10 Amsted Ind Inc Wheel hub cooling arrangement
US3370993A (en) * 1965-03-18 1968-02-27 Babcock & Wilcox Co Heat treatment of metals
US3558367A (en) * 1967-10-18 1971-01-26 Amsted Ind Inc Wheel cooling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729802A (en) * 1986-01-16 1988-03-08 J. I. Case Company Opener-disk heat-treating process and product
US5899516A (en) * 1996-01-23 1999-05-04 Sumitomo Metal Industries, Ltd. Railway wheel and manufacturing method of the railway wheel
JP3516189B2 (ja) 1996-01-23 2004-04-05 住友金属工業株式会社 耐摩耗性および耐熱亀裂性に優れた鉄道車両用車輪およびその製造方法
US5913988A (en) * 1996-03-29 1999-06-22 Valdunes Out of gauge resistant railroad wheel
US6205930B1 (en) * 1999-03-09 2001-03-27 Curt J. Waedekin Trolley wheel tread and flange
US6216362B1 (en) 2000-02-18 2001-04-17 Amsted Industries Incorporated Method and apparatus for control of the cooling rate of cast steel railway wheels

Also Published As

Publication number Publication date
AU448168B2 (en) 1974-05-09
DE2245424B2 (de) 1975-04-10
ZA725722B (en) 1973-05-30
DE2245424A1 (de) 1973-09-13
SE395284B (sv) 1977-08-08
DE2245424C3 (de) 1975-11-27
CA966397A (en) 1975-04-22
ES407190A1 (es) 1975-10-16
FR2172951A1 (OSRAM) 1973-10-05
IT965187B (it) 1974-01-31
GB1355774A (en) 1974-06-05
AU4576272A (en) 1974-03-07
FR2172951B1 (OSRAM) 1974-08-19

Similar Documents

Publication Publication Date Title
US3753789A (en) Making cast steel railway wheels
CN107042284A (zh) 一种生产铸钢件的铁模覆砂方法
US3558367A (en) Wheel cooling
US2311846A (en) Tempering glass
SE7605817L (sv) Kristallorienterat kiselstal och framstellning derav
JPS6363490B2 (OSRAM)
US2994161A (en) Method of and apparatus for casting glass
JPH0741370B2 (ja) 黒鉛鋳型
JPH071111A (ja) アルミニウム合金製車輪の製造装置
US1745424A (en) Method for casting pipes
JP2007270195A (ja) 球状黒鉛鋳鉄品の製造方法及び球状黒鉛鋳鉄品
CN107552764A (zh) 一种轨道车轮的流变锻旋生产方法
US4030532A (en) Method for casting steel ingots
US1908740A (en) Car wheel and process of making same
US2120700A (en) Vulcanizing mold and method of making same
US1908741A (en) Car wheel and method of making same
US2858589A (en) Ductile iron castings and methods of making same
US1915158A (en) Car wheel
US2281225A (en) Method of producing molds
US1876073A (en) Process of casting light metals in sand molds
JPH0512411B2 (OSRAM)
US1213902A (en) Carbon-steel car-wheel.
US825160A (en) Process of and apparatus for blowing hollow glass articles.
US1728641A (en) Car wheel
US2154947A (en) Hardening of metal surfaces

Legal Events

Date Code Title Description
AS Assignment

Owner name: AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE., IL

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, AS AGENT;REEL/FRAME:005070/0731

Effective date: 19880831