FR2476141A1 - Aluminium alloy gas cylinder prodn. - with heat treatment between cold extrusion and hot neck-forming operations - Google Patents

Aluminium alloy gas cylinder prodn. - with heat treatment between cold extrusion and hot neck-forming operations Download PDF

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Publication number
FR2476141A1
FR2476141A1 FR8004259A FR8004259A FR2476141A1 FR 2476141 A1 FR2476141 A1 FR 2476141A1 FR 8004259 A FR8004259 A FR 8004259A FR 8004259 A FR8004259 A FR 8004259A FR 2476141 A1 FR2476141 A1 FR 2476141A1
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FR
France
Prior art keywords
prodn
cold extrusion
heat treatment
aluminium alloy
gas cylinder
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
FR8004259A
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French (fr)
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FR2476141B1 (en
Inventor
Marc Anagnostidis
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.)
GERZAT METALLURG
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GERZAT METALLURG
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Publication date
Application filed by GERZAT METALLURG filed Critical GERZAT METALLURG
Priority to FR8004259A priority Critical patent/FR2476141A1/en
Publication of FR2476141A1 publication Critical patent/FR2476141A1/en
Application granted granted Critical
Publication of FR2476141B1 publication Critical patent/FR2476141B1/fr
Granted legal-status Critical Current

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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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • 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
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

In the prodn. of cylinders of Al alloy A-SGM (AFNOR standard NF A 50-101) by cold extrusion, hot forming of the neck portion, soln. heat treating, quenching and tempering, the alloy is heated at 400-550 deg.C (pref. 520-550 deg.C for 1-5 hrs.) between extrusion and hot forming. The intermediate heating leads to the formation of a fine homogeneous structure in the neck region of compressed gas cylinders, together with satisfactory strength and toughness.

Description

METHODE DE FABRICATION DE BOUTEILLES METALLIQUES EN A-SGM
Le domaine technique de l'invention est relatif à une méthode de fabrication de bouteilles métalliques en alliage d'aluminium type A-SGM (selon la norme AFNOR NF A 50-101).METHOD OF MANUFACTURING METAL BOTTLES IN A-SGM
The technical field of the invention relates to a method of manufacturing metallic bottles of aluminum alloy type A-SGM (according to AFNOR standard NF A 50-101).

La méthode de fabriaation de bouteilles pour gaz sous pression est habituellement la suivante - filage à froid d'un lopin métallique, - ogivage à chaud (à 4000C environ), - mise en solution à 530-5400C pendant 2 heures environ, - trempe à liteau, - revenu à 1750C pendant 8 heures.The manufacturing method for cylinders for pressurized gases is usually as follows - cold spinning of a metal piece, - hot icing (at around 4000C), - dissolving at 530-5400C for about 2 hours, - quenching at batten, - returned to 1750C for 8 hours.

Cette gamme de fabrication donne généralement satisfaction sauf en ce qui concerne la structure des ogives. En effet, on observe dans cette zone un grossissement exagéré du grain et un adoucissement marqué du métal ; en conséquence, la résistance mécanique en est affectée et il en résulte, en particulier, une déformation des filets à la suite des vissages et dévissages successifs des robinets au cours de l'utilisation des bouteilles.This production range is generally satisfactory, except for the structure of the warheads. In fact, we observe in this zone an exaggerated magnification of the grain and a marked softening of the metal; as a result, the mechanical resistance is affected and this results, in particular, in deformation of the threads following the successive screwing and unscrewing of the valves during the use of the bottles.

Par ailleurs, cette structure, plus fragile, comporte certains risques de rupture brutale et est, de ce fait, interdite dans un certain nombre d'applications impliquant des conditions de sécurité spécifiques.Furthermore, this more fragile structure involves certain risks of sudden rupture and is therefore prohibited in a certain number of applications involving specific safety conditions.

Le procédé selon l'invention permet d'obtenir une bouteille ayant une structure fine et homogène dans la zone d'ogive avec des caractéristiques mécaniques de résistance et de ténacité suffisantes.The method according to the invention makes it possible to obtain a bottle having a fine and homogeneous structure in the warhead zone with sufficient mechanical characteristics of resistance and tenacity.

Il consiste à intercaler dans la gamme classique décrite ci-dessus un chauffage intermédiaire, entre le filage à froid et 1 'ogivage à chaud dans un domaine de température compris entre 400 et 5500C (de préférence entre 520 et 5400C) pendant une durée pouvant aller, en général, de 1 à 5 heures. Le refroidissement après ce chauffage est indifférent il peut etre total (jusqu'à la température ambiante) ou partiel,à une vitesse quelconque (en pratique du refroidissement contrôlé en four à la trempe à l'eau) ; bien sur, l'ogivage à chaud peut être effectué directement après refroidissement jusque vers 4000C, sans refroidissement à la température ambiante.It consists in interposing in the conventional range described above an intermediate heating, between cold spinning and hot ogivage in a temperature range between 400 and 5500C (preferably between 520 and 5400C) for a period of time which can go generally 1 to 5 hours. The cooling after this heating is indifferent; it can be total (up to room temperature) or partial, at any speed (in practice controlled cooling in an oven with water quenching); of course, hot icing can be done directly after cooling down to around 4000C, without cooling to room temperature.

La méthode s'applique également aux alliages définis dans le projet de directives CEE concernant le rapprochement des législations des Etats membres relatives aux bouteilles à gaz sans soudure en alliage d'Aluminium (Journal Officiel des Communautés Européennes du 13.09.74 n0
C104/75 - 91), ainsi qu'à ceux conformes aux spécifications britanniques
HOAL 3 et HOAL 4 du HEALTH AND SAFETY EXECUTIVE.The method also applies to the alloys defined in the draft EEC directives concerning the approximation of the laws of the Member States relating to seamless gas cylinders made of Aluminum alloy (Official Journal of the European Communities of 13.09.74 n0
C104 / 75 - 91), as well as those conforming to British specifications
HOAL 3 and HOAL 4 from HEALTH AND SAFETY EXECUTIVE.

L'exemple suivant donne les résultats obtenus sur deux bouteilles en
A-SGM suivant le procédé classique (A) et le procédé selon l'invention (B).The following example gives the results obtained on two bottles in
A-SGM according to the conventional method (A) and the method according to the invention (B).

Deux bouteilles ~ 120 mm ont été fabriquées comme suit à partir d'un lopin ~ 119,5 x 80 mm.Two bottles ~ 120 mm were produced as follows from a piece ~ 119.5 x 80 mm.

BOUTEILLE A BOUTEILLE B
Filage à froid Filage à froid
Chauffage à 530du
pendant 3 heures
Ogivage à chaud à 4000C Ogivage à chaud à 4000C
Mise en solution à Mise en solution à
530-5400C/2 heures 520-5400C/2 heures
Trempe eau Trempe eau
Revenu à 1750C/8 heures Revenu à 175 C/8 heures.BOTTLE TO BOTTLE B
Cold spinning Cold spinning
Heating at 530 from
during 3 hours
Hot Icing at 4000C Hot Icing at 4000C
Solution Solution to Solution Solution to
530-5400C / 2 hours 520-5400C / 2 hours
Water quench Water quench
Income at 1750C / 8 hours Income at 175 C / 8 hours.

Les figures I et 2 représentent en coupe axiale la macro structure obtenue dans l'ogive après revenu sur les bouteilles A et B respectivement. Les caractéristiques mécaniques dans cette zone sont les suivantes (moyenne de trois essais)
BOUTEILLES
A B
Charge de rupture (MPa) 285 333
Limite élastique (MPa) 258 283
Allongement % (5d) 7 18,8. Figures I and 2 show in axial section the macro structure obtained in the warhead after tempering on bottles A and B respectively. The mechanical characteristics in this area are as follows (average of three tests)
BOTTLES
AB
Breaking load (MPa) 285 333
Elastic limit (MPa) 258 283
Elongation% (5d) 7 18.8.

Claims (4)

REVENDICATIONS 10/ Procédé de fabrication de bouteilles en alliage type A-SGM comportant un filage à froid, un ogivage à chaud, une mise en solution, trempe et revenu, caractérisé en ce qu'on chauffe l'ébauche, entre le filage à froid et l'ogivage, dans un domaine de température compris entre 400 et 5500C. 10 / A method of manufacturing A-SGM type alloy bottles comprising cold spinning, hot ogivage, dissolving, quenching and tempering, characterized in that the blank is heated, between cold spinning and ogivage, in a temperature range between 400 and 5500C. 20/ Procédé selon revendication 1, caractérisé en ce que le chauffage est effectué pendant 1 à 5 heures.20 / A method according to claim 1, characterized in that the heating is carried out for 1 to 5 hours. 30/ Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que le chauffage est effectué entre 520 et 5500C. 30 / Method according to one of claims 1 or 2, characterized in that the heating is carried out between 520 and 5500C. 40/ Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que le chauffage est suivi d'une trempe à l'eau avant ogivage. 40 / A method according to one of claims 1 or 2, characterized in that the heating is followed by quenching with water before ogivage.
FR8004259A 1980-02-20 1980-02-20 Aluminium alloy gas cylinder prodn. - with heat treatment between cold extrusion and hot neck-forming operations Granted FR2476141A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8004259A FR2476141A1 (en) 1980-02-20 1980-02-20 Aluminium alloy gas cylinder prodn. - with heat treatment between cold extrusion and hot neck-forming operations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8004259A FR2476141A1 (en) 1980-02-20 1980-02-20 Aluminium alloy gas cylinder prodn. - with heat treatment between cold extrusion and hot neck-forming operations

Publications (2)

Publication Number Publication Date
FR2476141A1 true FR2476141A1 (en) 1981-08-21
FR2476141B1 FR2476141B1 (en) 1982-01-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081704A (en) * 2015-09-16 2015-11-25 马鞍山市安工大工业技术研究院有限公司 Method for manufacturing pressing oil cylinder body of plate shearing machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147869A1 (en) * 1971-08-04 1973-03-11 Hutogepgyar Strong, seamless a1-alloy flasks - for the conveyance of pressurised gases
FR2238892A1 (en) * 1973-07-25 1975-02-21 Gerzat Metallurg
US3984259A (en) * 1975-08-22 1976-10-05 Aluminum Company Of America Aluminum cartridge case

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147869A1 (en) * 1971-08-04 1973-03-11 Hutogepgyar Strong, seamless a1-alloy flasks - for the conveyance of pressurised gases
FR2238892A1 (en) * 1973-07-25 1975-02-21 Gerzat Metallurg
US3984259A (en) * 1975-08-22 1976-10-05 Aluminum Company Of America Aluminum cartridge case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081704A (en) * 2015-09-16 2015-11-25 马鞍山市安工大工业技术研究院有限公司 Method for manufacturing pressing oil cylinder body of plate shearing machine

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Publication number Publication date
FR2476141B1 (en) 1982-01-15

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