GB889451A - Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products - Google Patents

Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products

Info

Publication number
GB889451A
GB889451A GB1354759A GB1354759A GB889451A GB 889451 A GB889451 A GB 889451A GB 1354759 A GB1354759 A GB 1354759A GB 1354759 A GB1354759 A GB 1354759A GB 889451 A GB889451 A GB 889451A
Authority
GB
United Kingdom
Prior art keywords
extrusion
temperature
ingot
alloy
alloys
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
Application number
GB1354759A
Inventor
Geoffrey Hoyle
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.)
British Iron and Steel Research Association BISRA
Original Assignee
British Iron and Steel Research Association BISRA
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 British Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Priority to GB1354759A priority Critical patent/GB889451A/en
Publication of GB889451A publication Critical patent/GB889451A/en
Expired 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/01—Extruding metal; Impact extrusion starting from material of particular form or shape, e.g. mechanically pre-treated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Of Metal (AREA)

Abstract

889,451. Extruding; working at specified temperatures; making ingots. BRITISH IRON & STEEL RESEARCH ASSOCIATION. June 23, 1960 [April 21, 1959], No. 13547/59. Classes 83 (2) and 83 (4). In the extrusion of steel alloys of the type whose carbon content is sufficiently high to form, when the alloys freeze, a eutectic which appears as large cells, which contains little or no austenite and can be hardened by quenching to give a substantially martensitic structure, a cast ingot of the alloy is maintained at or above the maximum extrusion temperature for such time that the structure of the alloy becomes more homogeneous upon subsequent cooling, and the ingot is then extruded at the maximum extrusion temperature. A high-speed tool steel alloy is cast in a graphite mould, allowed to solidify, stripped from the mould and, if necessary after fettling, and machining, transferred to a furnace where it is maintained at a temperature of 1250-1300‹ C. for half to one hour. Alternatively, the cast ingot may be cooled and annealed before transfer to the furnace. For some alloys, the temperature may be maintained above maximum extrusion temperature and the ingot subsequently cooled to extrusion temperature. After extrusion the product may be quenched in air, oil or hot salt and temperature. The product is finally ground to finished size and steam tempered and nitrided. Examples are given for the extrusion of a particular tool steel alloy. Twist drills may be extruded by using a fluted extrusion die.
GB1354759A 1959-04-21 1959-04-21 Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products Expired GB889451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1354759A GB889451A (en) 1959-04-21 1959-04-21 Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1354759A GB889451A (en) 1959-04-21 1959-04-21 Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products

Publications (1)

Publication Number Publication Date
GB889451A true GB889451A (en) 1962-02-14

Family

ID=10024928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1354759A Expired GB889451A (en) 1959-04-21 1959-04-21 Improvements in or relating to the manufacture by extrusion of wrought metal semi-finished products

Country Status (1)

Country Link
GB (1) GB889451A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027634A (en) * 1990-02-28 1991-07-02 Granco-Clark, Inc. Solutionizing taper quench
CN114770045A (en) * 2022-05-05 2022-07-22 无锡派克新材料科技股份有限公司 Forging process for forming manhole cylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027634A (en) * 1990-02-28 1991-07-02 Granco-Clark, Inc. Solutionizing taper quench
CN114770045A (en) * 2022-05-05 2022-07-22 无锡派克新材料科技股份有限公司 Forging process for forming manhole cylinder
CN114770045B (en) * 2022-05-05 2024-04-12 无锡派克新材料科技股份有限公司 Forging process for forming manhole barrel

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