EN 23907:1993

Hardmetals - Determination of total carbon content - Gravimetric method (ISO 3907:1985)

Hartmetalle - Bestimmung des Gesamtkohlenstoff-Gehaltes - Gravimetrisches Verfahren (ISO 3907:1985)

Métaux-durs - Dosage du carbone total - Méthode gravimétrique (ISO 3907:1985)

Fournit les lignes directrices pour la sélection parmi les méthodes d'essais Fc de vibrations stationnaires sinusoïdales, Fh aléatoires et Fx composites de la série 60068-2. Ces différentes méthodes d'essais quasi stationnaires ainsi que leur objet sont brièvement décrites à l'Article 4. Les méthodes d'essais en transitoire ne sont pas incluses.
Lors de la réalisation d'essais en vibration, il convient de connaître les conditions d'environnement, et spécialement les conditions dynamiques du spécimen en essai. La présente norme aide à réunir l'information relative aux conditions d'environnement (Article 5), à estimer ou à mesurer les conditions dynamiques (Article 6) et donne des exemples afin d'illustrer les choix à réaliser pour la plupart des méthodes d'essais applicables en environnement vibratoire. A partir des conditions d'environnement, la méthodologie de choix de l'essai approprié est fournie. Puisque les conditions d'environnement vibratoire naturelles sont de nature aléatoire, il est recommandé que les essais en vibrations aléatoires soient généralement, les méthodes retenues (voir Tableau 1, Article 7).
Les méthodes décrites ci-après peuvent être utilisées pour examiner la réponse vibratoire du spécimen en essai avant, pendant et après un essai de vibrations. Le choix de la méthode appropriée est décrit à l'Article 8 et présenté au Tableau 2.
Les spécificateurs trouveront dans la présente norme les informations relatives aux méthodes d'essais vibratoires et les lignes directrices pour choisir parmi elles la méthode appropriée. Pour choisir les paramètres ou les sévérités relatives à l'une de ces méthodes, il y a lieu de se reporter aux références normatives.

Hardmetals - Determination of total carbon content - Gravimetric method (ISO 3907:1985)

General Information

• Status: Withdrawn
• Publication Date: 06-Apr-1993
• Withdrawal Date: 30-Sep-2009
• ICS: 77.160 - Powder metallurgy
• Technical Committee: CEN/SS M11 - Powder metallurgy
• Drafting Committee: CEN/SS M11 - Powder metallurgy
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Oct-2009
• Completion Date: 01-Oct-2009
• Ref Project: SIST EN 23907:2000 - Hardmetals - Determination of total carbon content - Gravimetric method (ISO 3907:1985)

Relations

• Replaced By: EN ISO 3907:2009 - Hardmetals - Determination of total carbon - Gravimetric method (ISO 3907:2009)
• Effective Date: 10-Oct-2009

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 23907:2000
01-december-2000
Hardmetals - Determination of total carbon content - Gravimetric method (ISO
3907:1985)
Hardmetals - Determination of total carbon content - Gravimetric method (ISO
3907:1985)
Hartmetalle - Bestimmung des Gesamtkohlenstoff-Gehaltes - Gravimetrisches Verfahren
(ISO 3907:1985)
Métaux-durs - Dosage du carbone total - Méthode gravimétrique (ISO 3907:1985)
Ta slovenski standard je istoveten z: EN 23907:1993
ICS:
77.160 Metalurgija prahov Powder metallurgy
SIST EN 23907:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 23907:2000

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SIST EN 23907:2000

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SIST EN 23907:2000

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SIST EN 23907:2000
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEXAYHAPOAHAR OPTAHU3AUMR I-IO CTAHAAPTi43A~i4Vl~ORGANISATION INTERNATIONALE DE NORMALISATION
Determination of total carbon content -
Hardmetals -
Gravimetric method
M&aux-durs - Dosage du carbone total - /Wthode gravimetrigue
Second edition - 1985-02-01
Ref. No. ISO 3907-1985 (E)
UDC 621.762 : 546.26 : 543.21
w
-
hardmetals, Chemical analysis, determination of content, carbon, gravimetric
Descriptors : powder metallurgy, carbides, Sinter-ed products,
analysis.
0
Ul
Price based on 3 pages
-

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SIST EN 23907:2000
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 3907 was prepared by Technical Committee ISO/TC 119,
Powder metahrgy.
1977. This second edition cancels and replaces the first
ISO 3907 was first published in
edition, of which it constitutes a technical revision.
0
International Organkation for Standardkation, 1985
Printed in Switzerland

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SIST EN 23907:2000
ISO 39074985 (E)
INTERNATIONAL STANDARD
Determination of total carbon content -
Hardmetals -
Gravimetric method
of the ascarite, which corresponds to the quantity of carbon
1 Scope
dioxide formed.
This International Standard specifies a gravimetric method for
determination of the total carbon content of carbides and hard-
c + 0, + CO,
metals.
2NaOH + CO, + Na,CO, + H,O
2 Field of application
This method is applicable to
4 Reagents
-
hafnium, molybdenum,
carbides of chromium,
During the analysis, use only reagents of recognized analytical
niobium, tantalum, titanium, vanadium, tungsten and
grade, and only distilled water or water of equivalent purity.
zirconium,
-
mixtures of these carbides and binder metals, free of
4.1 Oxygen, with a limitation of carbon-containing im-
lubricant,
purities < 0,6 ml of carbon per cubic metre of Oxygen.
-
all grades of presintered or sintered hardmetals, pro-
duced from these carbides,
4.2 Magnesium perchlorate, anhydrous.
having a total carbon content exceeding 4 % (mlm).
CAUTION - To prevent any possibility of explosion, con-
tact of this reagent with organic materials should be
avoided, especially when discarding it.
3 Principle
Oxidation of carbon to carbon dioxide at high temperature in a
4.3 Flux, for example tin metal, topper metal or Oxide, iron
stream of pure Oxygen, with the addition of a flux if necessary.
metal.
Absorption of the carbon dioxide, carried by Oxygen, by
4.4 Ascarite.
ascarite in a tared bulb. Determination of the increase in mass

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SIST EN 23907:2000
ISO 3907-1985 (El
5 Apparatus
Ordinary laboratory apparatus and
5.1 Apparatus, consisting of an electric furnace with a com-
bustion tube, a purification train and a System to absorb carbon
dioxide. If necessary to obtain Oxygen of adequate purity, an -
Oxygen purification train may also be used.
Glass wool in stopper
Successive Parts of the apparatus shall be joined together with
\ Anhydrous magnesium
connecting tubes forming an a
...