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
  • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C23/00—Extruding metal; Impact extrusion
  • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
• • G—PHYSICS
  • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
  • G21C—NUCLEAR REACTORS
  • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
  • G21C3/02—Fuel elements
  • G21C3/04—Constructional details
  • G21C3/06—Casings; Jackets
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E30/00—Energy generation of nuclear origin
  • Y02E30/30—Nuclear fission reactors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4981—Utilizing transitory attached element or associated separate material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
  • Y10T29/49982—Coating

Definitions

• the billet maybe coated'with silver and then extruded at 900 C.
• the present invention relates to improvements in processes for the manufacture of beryllium products as used particularly in the fields of aviation, astronautics and atomic energy.
• the invention is concerned more particularly with processes for the manufacture of beryllium tubes, and more particularly tubes suitable for casing the fuel elements of nuclear reactors.
• the present invention relates to a process for the preparation of beryllium products and particularly tubes, which more fully satisfies than hitherto the various practical requirements, notably by virtue of the fact that it makes it possible to obtain a less fragile product of more favourable texture in the sense that it conforms to the following two characteristics:
• the base planes of the elemental crystallites are for the greater part disposed in parallel relationship to the extruding direction
• the process according to the invention consists mainly-while using a cast beryllium ingot as starting material, optically subjected to compressionin subjecting it, in the course of its shaping, to at least one hot working operation followed by a forging, notably in a press, optionally .under a thick steel casing, and by at least one further extrusion performed after removal of the casing, when necessary.
• the invention further comprises other features which are preferably used at the same time, considered separately or in all the technical possible combinations:
• the said hot working operation consists in an extrusion in a casing, which casing may consist of soft steel, and
• the choice of the hot working operation acts as a second factor.
• Methods as different as impact extrusion and the conventional cased extrusion technique may be employed, 'this second method, however, giving tubes of greater length and greater homogeneity.
• transverse ductility D a further means of improing the transverse ductility D is to vary the angular distribution of the base planes. If these are radially disposed (as in the case of a tube), longitudinal fissures will tend to appear and cleavage will be facilitated.
• Example A cast metal cylinder is coated with a thin layer of soft steel 2 mm. thick. The whole is compressed at 800 C., and then extruded at about 900 C. with a cold working degree of 6. A bar 40 mm. in diameter is obtained, from which a billet is sliced.
• This billet is disposed in a soft-steel envelope 10 mm. thick and will be subjected to the forging operation. After heating to about 1000 C., the billet together with its envelope is compressed in the press along its axis so as to bring its height from the value H to the value h.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Crystallography & Structural Chemistry (AREA)
• Materials Engineering (AREA)
• Thermal Sciences (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Plasma & Fusion (AREA)
• General Engineering & Computer Science (AREA)
• High Energy & Nuclear Physics (AREA)
• Extrusion Of Metal (AREA)
• Forging (AREA)
• Powder Metallurgy (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8815242

Family Applications (1)

Country Status (10)

Citations (4)

• 1963
  • 1963-10-25 FR FR951894A patent/FR1382220A/fr not_active Expired
• 1964
  • 1964-10-06 CH CH1293464A patent/CH426281A/fr unknown
  • 1964-10-07 BE BE654076A patent/BE654076A/xx unknown
  • 1964-10-15 NL NL6412031A patent/NL6412031A/xx unknown
  • 1964-10-15 GB GB42142/64A patent/GB1085034A/en not_active Expired
  • 1964-10-17 LU LU47160A patent/LU47160A1/xx unknown
  • 1964-10-19 US US404906A patent/US3408710A/en not_active Expired - Lifetime
  • 1964-10-19 IL IL22274A patent/IL22274A/xx unknown
  • 1964-10-23 DE DEC34177A patent/DE1297875B/de active Pending
  • 1964-10-23 SE SE12787/64A patent/SE311235B/xx unknown

Patent Citations (4)

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