US1671253A - Casting of ingots - Google Patents

Casting of ingots Download PDF

Info

Publication number
US1671253A
US1671253A US224453A US22445327A US1671253A US 1671253 A US1671253 A US 1671253A US 224453 A US224453 A US 224453A US 22445327 A US22445327 A US 22445327A US 1671253 A US1671253 A US 1671253A
Authority
US
United States
Prior art keywords
casting
ingots
ingot
mould
metal
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
US224453A
Inventor
Parsons Charles Algernon
Duncan Hugh Malcolm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1671253A publication Critical patent/US1671253A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • cmLns ALenRNoN FARSONS A D HUGH MALCOLM DUNCAN, or NEWCASTLE-N- TYNE, ENGLAND; SAID DUNCAN ASSIGNOR T0 SAID PARSONS.
  • the invention relates to the casting of steel ingots.
  • the invention consists. in a process of casting steel ingots comprising pour ng the molten metal into a mould having its longitudinal dimensions greater than its vertical, thick refractory material cover ng the sides of said mould and a bottom chill of large dimensions preferably of metal, preheating the mould to a high temperature of the order of molten steel before pouring the metal therein, and continuously supplying.
  • the invention also consists in the process of casting steel ingots to be hereinafter described or indicated.
  • the mould consists of a strong sheet steel casing, a, slightly conical in form as shown and reinforced by heavy angles, b, top and bottom.
  • the casing is lined with shaped firebrick quoins, d, closely fitted together and to the outer casing and is preferably provided with lift ing eyes, a, riveted to the sides.
  • the burners, 1' may be used for preheating the mould.
  • the cover is also provided with a hole
  • the chilled block, m may be of cast iron or steel formed of one or more pieces fitted together and preferably protected on. its upper surface against the wash of the molten steel by a thin steel plate, a, which is easily renewable.
  • the chill block may be artificially cooled in any well-known way such as by gills, or supporting ribs, cast on the underside and integral with the block, and traversed by artificial airblast.
  • any desired rate of cooling of the sides of the ingot can be obtained and that further in some cases it may be found desirable to thicken the firebrick and form heating fiues and burners within it or provide other means of heating such as electrically heated coils.
  • the internal surface of the mould must be kept as smooth as possible with any suit-. able wash, such as clay, graphite, carborundum or the like, so as to part freel from the ingot after it has sufiiciently cooled and contracted.
  • able wash such as clay, graphite, carborundum or the like
  • the breadth or diameter of the ingot, o is twice the height, but this ratio may be varied according to the size of the ingot, the facilities available for for ing it and the final characteristics'desire in the finished forging.
  • the mould is removed by a crane in the ordi- 105 nary way, leaving the ingot standing on the block.
  • the segregates are distributed more evenly throughout the ingot while in addition, due to the molten no metal solidifying more nearly at the same time throughout the cross section of the ingot, axial weakness or looseness of struc-.
  • a process of casting steel ingots which comprises preheating the walls of a mold to a high temperature of the order of molten steel before pouring the metal therein, while maintaining the mold chill relatively cool, pouring the molten metal into the mold to form a pool having its longitudinal dimensions greater than its vertical, and continuously supplying heat to the upper surface of the molten metal after casting so tlfiat the upper surface is the last to solid- 1 y.

Description

May 29, 1928.
C. A. PARSONS ET AL CASTING OF INGOTS Filed Oct. 1927 Patented May 29, 192 8.
UNITED STATES 1,671,253 PATENT OFFICE.
. cmLns ALenRNoN FARSONS A D HUGH MALCOLM DUNCAN, or NEWCASTLE-N- TYNE, ENGLAND; SAID DUNCAN ASSIGNOR T0 SAID PARSONS.
CASTING or INGors.
Application filed October 6, 1927, Serial No. 224,453, and in Great Britain April 29, 1926.
The invention relates to the casting of steel ingots.
In casting steel ingots, difficulties arlse I in connection with the segregation of certain elements such as carbon, sulphur and phosphorus and also in connection withthe looseness of structureabout the central axis of the ingot and the main object of the resent invention is to overcome or assist in overcoming such difficulties so as to se cure ingots of, greater homogeneity and soundness.
With the object indicated 7 The invention consists. in a process of casting steel ingots comprising pour ng the molten metal into a mould having its longitudinal dimensions greater than its vertical, thick refractory material cover ng the sides of said mould and a bottom chill of large dimensions preferably of metal, preheating the mould to a high temperature of the order of molten steel before pouring the metal therein, and continuously supplying.
heat to the upper surface of the molten metal after casting so that the upper' layer is the last to solidify.
The invention also consists in the process of casting steel ingots to be hereinafter described or indicated. J
The accompanying drawing shows a diagrammatic sectional elevation of one structural form of the invention by way of example.
In carrying' the invention into efiect according to this form, the mould consists of a strong sheet steel casing, a, slightly conical in form as shown and reinforced by heavy angles, b, top and bottom. The casing is lined with shaped firebrick quoins, d, closely fitted together and to the outer casing and is preferably provided with lift ing eyes, a, riveted to the sides.
heat to the surface of the metal after ing it with its cover in place on the top of an adjoiningfirebrick table containing suitable gas or oil burners delivering flame upwards. If desired the burners, 1', may be used for preheating the mould.
The cover is also provided with a hole,
I, for use when pouring. The chilled block, m, may be of cast iron or steel formed of one or more pieces fitted together and preferably protected on. its upper surface against the wash of the molten steel by a thin steel plate, a, which is easily renewable.
The chill block may be artificially cooled in any well-known way such as by gills, or supporting ribs, cast on the underside and integral with the block, and traversed by artificial airblast.
It is evident that by varying the duration and intensity of heating and the thickness and insulating quality of the firebrick of the mould, any desired rate of cooling of the sides of the ingot can be obtained and that further in some cases it may be found desirable to thicken the firebrick and form heating fiues and burners within it or provide other means of heating such as electrically heated coils.
The internal surface of the mould must be kept as smooth as possible with any suit-. able wash, such as clay, graphite, carborundum or the like, so as to part freel from the ingot after it has sufiiciently cooled and contracted.
According to the form shown in the drawing, the breadth or diameter of the ingot, o, is twice the height, but this ratio may be varied according to the size of the ingot, the facilities available for for ing it and the final characteristics'desire in the finished forging. I
7 By means of the apparatus described, cooling of the-ingot due to the heat capacity of the massive metal base, m, and the use of the burner or burners, 7', takes place 1 from the bottom upwards with the isothermals lying approximately in horizontal planes.
When the ingot 'is sufficiently set the mould is removed by a crane in the ordi- 105 nary way, leaving the ingot standing on the block.
By virtue of the invention the segregates are distributed more evenly throughout the ingot while in addition, due to the molten no metal solidifying more nearly at the same time throughout the cross section of the ingot, axial weakness or looseness of struc-.
Weighing 2 tons 14 cwt. cast in accordance with the methods above described by help of a base block Weighing 10 tons, was found on examination to be sound throughout and of great chemical homogeneity. 1
Having now described our invention, what we claim as new and desire to secure by Letters Patent is A process of casting steel ingots which comprises preheating the walls of a mold to a high temperature of the order of molten steel before pouring the metal therein, while maintaining the mold chill relatively cool, pouring the molten metal into the mold to form a pool having its longitudinal dimensions greater than its vertical, and continuously supplying heat to the upper surface of the molten metal after casting so tlfiat the upper surface is the last to solid- 1 y. I
In testimony whereof we have signed our names to this specification.
CHARLES ALGERNON PARSONS.
HUGH MALCOLM DUNCAN.
US224453A 1926-04-29 1927-10-06 Casting of ingots Expired - Lifetime US1671253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1671253X 1926-04-29

Publications (1)

Publication Number Publication Date
US1671253A true US1671253A (en) 1928-05-29

Family

ID=10888074

Family Applications (1)

Application Number Title Priority Date Filing Date
US224453A Expired - Lifetime US1671253A (en) 1926-04-29 1927-10-06 Casting of ingots

Country Status (1)

Country Link
US (1) US1671253A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639876A (en) * 1947-09-03 1953-05-26 Misfeldt Charles Clayton Molded structure
US2821760A (en) * 1956-12-24 1958-02-04 Union Carbide Corp Flame heating of metal castings to reduce shrinkage cavities

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639876A (en) * 1947-09-03 1953-05-26 Misfeldt Charles Clayton Molded structure
US2821760A (en) * 1956-12-24 1958-02-04 Union Carbide Corp Flame heating of metal castings to reduce shrinkage cavities

Similar Documents

Publication Publication Date Title
US3204301A (en) Casting process and apparatus for obtaining unidirectional solidification
US1844701A (en) Method and apparatus for centrifugal casting
US1961399A (en) Ingot casting method
US1671253A (en) Casting of ingots
US2294169A (en) Casting iron and steel
US1892044A (en) Method of casting ingots
US490451A (en) John b
US2025336A (en) Method of forming large hollow castings
US2020184A (en) Portable hood
US2429145A (en) Mold for casting metals
US1998258A (en) Ingot casting apparatus
US2281718A (en) Method of casting metal ingots and apparatus therefor
US1172506A (en) Means for casting metals, including their alloys.
US1817340A (en) Casting apparatus
GB1449052A (en) Ingot moulds
GB191308490A (en) A Process for Casting Ingots or other Castings.
US1073735A (en) Method of making sound castings.
US2340493A (en) Method of casting metal ingots and apparatus therefor
US1698308A (en) Apparatus for casting hollow ingots
SU341323A1 (en) Method of electroslag casting of ingots
GB278032A (en) Improvements in and relating to the casting of ingots
US1409084A (en) Ingot mold
US983357A (en) Method of casting ingots.
US1310072A (en) Field
US1865041A (en) Casting of ingots