GB838682A - Improvements in or relating to a method of making rod-shaped composite spark plug electrodes - Google Patents

Improvements in or relating to a method of making rod-shaped composite spark plug electrodes

Info

Publication number
GB838682A
GB838682A GB25988/58A GB2598858A GB838682A GB 838682 A GB838682 A GB 838682A GB 25988/58 A GB25988/58 A GB 25988/58A GB 2598858 A GB2598858 A GB 2598858A GB 838682 A GB838682 A GB 838682A
Authority
GB
United Kingdom
Prior art keywords
metal
sheath
compact
layers
powder
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
GB25988/58A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB838682A publication Critical patent/GB838682A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21C23/22—Making metal-coated products; Making products from two or more metals
    • 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
    • B21C23/14—Making other products
    • 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
    • B21C33/004—Composite billet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/04—Shaping in the rough solely by forging or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Spark Plugs (AREA)

Abstract

838,682. Powder metallurgy. GENERAL MOTORS CORPORATION. Aug. 13, 1958 [Sept. 25, 1957], No. 25988/58. Class 82(1) [Also in Group XXII] Composite spark plug electrodes are made by compacting two or more layers of different powdered metals, sintering at a temperature below the melting point of the lowest melting point metal of the compact and then extruding the sintered compact transversely of the layers to form an electrode with a core of one metal and a sheath of another. A heat and corrosion resistant metal such as Ni, Pt or Fe forms the sheath while a metal with a high heat conductivity such as Cu or Ag forms the core. Two layers of 100 mesh Cu powder and 100 mesh Ni powder 6, 10 (Fig. 2) are simultaneously compacted at 100,000 p.s.i. and the compact sintered at 1850‹F for one hour under hydrogen. The compact is re-pressed at 150,000 p.s.i. annealed at 1850‹F for two hours in hydrogen and finally extruded with the Ni layer adjacent the extrusion orifice to form a rod shaped composite article with a Cu core 26 and a Ni sheath 28 and Ni tip 36 (Fig. 8). The composite rod is then shaped by conventional forming and cutting operations to form a spark plug centre electrode. By varying the shape of the interface of the powder layers of the "green compact" by compacting the first powder layer with a shaped top punch the thickness of the bottom or top and sides of the extruded metal sheath may be varied (Figs. 11-18 not shown). The composite "green compact" may also be produced by pressing the metal layers separately and finally pressing them together. A three layer composite electrode having a Cu core, an Fe sheath and a Ni tin can also be made by this process.
GB25988/58A 1957-09-25 1958-08-13 Improvements in or relating to a method of making rod-shaped composite spark plug electrodes Expired GB838682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US838682XA 1957-09-25 1957-09-25

Publications (1)

Publication Number Publication Date
GB838682A true GB838682A (en) 1960-06-22

Family

ID=22181187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25988/58A Expired GB838682A (en) 1957-09-25 1958-08-13 Improvements in or relating to a method of making rod-shaped composite spark plug electrodes

Country Status (1)

Country Link
GB (1) GB838682A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857145A (en) * 1972-04-14 1974-12-31 Nippon Denso Co Method of producing spark plug center electrode
CN114769599A (en) * 2022-03-31 2022-07-22 西北有色金属研究院 Preparation method of electrode for molybdenum alloy electron beam melting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857145A (en) * 1972-04-14 1974-12-31 Nippon Denso Co Method of producing spark plug center electrode
CN114769599A (en) * 2022-03-31 2022-07-22 西北有色金属研究院 Preparation method of electrode for molybdenum alloy electron beam melting
CN114769599B (en) * 2022-03-31 2023-07-18 西北有色金属研究院 Preparation method of molybdenum alloy electrode for electron beam melting

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