FR2236613A1 - Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity - Google Patents

Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity

Info

Publication number
FR2236613A1
FR2236613A1 FR7324395A FR7324395A FR2236613A1 FR 2236613 A1 FR2236613 A1 FR 2236613A1 FR 7324395 A FR7324395 A FR 7324395A FR 7324395 A FR7324395 A FR 7324395A FR 2236613 A1 FR2236613 A1 FR 2236613A1
Authority
FR
France
Prior art keywords
grain size
thermo
state
small grain
treatment method
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.)
Granted
Application number
FR7324395A
Other languages
French (fr)
Other versions
FR2236613B1 (en
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7324395A priority Critical patent/FR2236613A1/en
Publication of FR2236613A1 publication Critical patent/FR2236613A1/en
Application granted granted Critical
Publication of FR2236613B1 publication Critical patent/FR2236613B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
    • B21D26/055—Blanks having super-plastic properties
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
    • 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
    • B21C23/002—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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • 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
    • 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
    • B23P25/00—Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
    • 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
    • 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

Abstract

The material is subjected to a thermo-mechanical process immediately before being deformed, causing a small grain size to be created in the material, and temporarily putting the material into a state of "superplasticity". The grain size is less than 5 microns. The deformation is then carried out of the optimum rate for the superplastic material. Materials normally difficult to put into a state of superplasticity are treated by thermal soaking and raising to approximately half the material melting temperature. The creation of the superplastic state can be by means of extrusion, rolling, sintering, etc.
FR7324395A 1973-07-03 1973-07-03 Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity Granted FR2236613A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7324395A FR2236613A1 (en) 1973-07-03 1973-07-03 Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324395A FR2236613A1 (en) 1973-07-03 1973-07-03 Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity

Publications (2)

Publication Number Publication Date
FR2236613A1 true FR2236613A1 (en) 1975-02-07
FR2236613B1 FR2236613B1 (en) 1982-07-02

Family

ID=9121992

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7324395A Granted FR2236613A1 (en) 1973-07-03 1973-07-03 Thermo-mechanical material treatment method - develops small grain size to give state of very high plasticity

Country Status (1)

Country Link
FR (1) FR2236613A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739661A1 (en) * 1995-04-28 1996-10-30 Rockwell International Corporation Method of superplastic extrusion
US5671631A (en) * 1994-12-15 1997-09-30 Toyota Jidosha Kabushiki Kaisha Hot plastic working method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5671631A (en) * 1994-12-15 1997-09-30 Toyota Jidosha Kabushiki Kaisha Hot plastic working method
EP0739661A1 (en) * 1995-04-28 1996-10-30 Rockwell International Corporation Method of superplastic extrusion
US5620537A (en) * 1995-04-28 1997-04-15 Rockwell International Corporation Method of superplastic extrusion

Also Published As

Publication number Publication date
FR2236613B1 (en) 1982-07-02

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse