GB968520A - Process for the extrusion of pre-sintered blanks or billets - Google Patents

Process for the extrusion of pre-sintered blanks or billets

Info

Publication number
GB968520A
GB968520A GB1430662A GB1430662A GB968520A GB 968520 A GB968520 A GB 968520A GB 1430662 A GB1430662 A GB 1430662A GB 1430662 A GB1430662 A GB 1430662A GB 968520 A GB968520 A GB 968520A
Authority
GB
United Kingdom
Prior art keywords
coating
blank
extrusion
foil
layer
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
GB1430662A
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.)
EBERHARD BOSCH
Original Assignee
EBERHARD BOSCH
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 EBERHARD BOSCH filed Critical EBERHARD BOSCH
Publication of GB968520A publication Critical patent/GB968520A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/008—Using a protective surface layer
    • 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
    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • 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
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • 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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
    • 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
    • B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
    • B21C33/002—Encapsulated billet

Abstract

968,520. Extruding; working at specified temperatures. E. DURRWACHTER, and E. BOSCH. April 13, 1962 [May 15, 1961], No. 14306/62. Headings B3P and B3V. In the hot extrusion of pre-sintered blanks 4, the blank is surrounded during heating and extrusion by a protective coating 5 to exclude oxygen. The blank may be a combination of sintered tungsten-copper, silver-molybdenum, silver-nickel or silver-graphite; the extruded product is preferably used in the manufacture of electric contacts. Coating 5 may be a layer of brass foil for extrusion temperatures up to 800 ‹ C., a layer of copper foil for extrusion temperatures between 800-1000‹ C. and a layer of iron foil for temperatures above 1000‹ C. The press ram 2 has a concave head 3 of smaller diameter than the blank whereby after extrusion, Fig. 5 (not shown), substantially the whole of the coating remains in the discard; a small portion of coating in front of the extruded product may be removed by wire brushing. A shielding gas for the extruded product is admitted at 12 into a bush 11 and a cooling water spray 13 is provided. In another embodiment, Fig. 2 (not shown), the layer of foil is in two parts and after heating the covered blank in a furnace, the lower part is detached before introducing the blank into the billet container. This prevents any part of the coating being present at the front of the extruded product. Alternatively the coating may be of graphite and/or magnesium or aluminium oxide, possibly with an addition of titanium oxide, which oxides may be mixed with water-glass into a paste and baked on to the blank. A combination of a non-metallic coating and a foil wrapping may be used.
GB1430662A 1961-05-15 1962-04-13 Process for the extrusion of pre-sintered blanks or billets Expired GB968520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0036082 1961-05-15

Publications (1)

Publication Number Publication Date
GB968520A true GB968520A (en) 1964-09-02

Family

ID=7042946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1430662A Expired GB968520A (en) 1961-05-15 1962-04-13 Process for the extrusion of pre-sintered blanks or billets

Country Status (3)

Country Link
CH (1) CH423432A (en)
FR (1) FR1325948A (en)
GB (1) GB968520A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791172A (en) * 1971-07-21 1974-02-12 Montedison Spa Apparatus for making a glass or the like coated wire
JPS5024708B1 (en) * 1970-05-20 1975-08-18

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2201141A1 (en) * 1972-10-04 1974-04-26 Davy Ashmore Ltd Sealing metal compact outer surfaces - prior to extrusion with glass, salt or fine powder of ductile metal
CN110624969A (en) * 2019-11-08 2019-12-31 兰州理工大学 Extrusion deformation device for preparing high-strength magnesium alloy and preparation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024708B1 (en) * 1970-05-20 1975-08-18
US3791172A (en) * 1971-07-21 1974-02-12 Montedison Spa Apparatus for making a glass or the like coated wire

Also Published As

Publication number Publication date
CH423432A (en) 1966-10-31
FR1325948A (en) 1963-05-03

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