EN ISO 4545-3:2005
(Main)Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks (ISO 4545-3:2005)
Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks (ISO 4545-3:2005)
ISO 4545-3:2005 specifies the method for the calibration of reference blocks to be used for the indirect verification of Knoop hardness testing machines as specified in ISO 4545-2.
The method is applicable only for indentations with long diagonals greater than or equal to 0,020 mm.
Metallische Werkstoffe - Härteprüfung nach Knoop - Teil 3: Kalibrierung der Härtevergleichsplatten (ISO 4545-3:2005)
In diesem Teil von ISO 4545 ist das Verfahren für die Kalibrierung von Härtevergleichsplatten festgelegt, die bei der indirekten Prüfung von Härteprüfmaschinen nach Knoop entsprechend ISO 4545 2 eingesetzt werden. Das Verfahren ist nur auf Eindrücke mit langen Diagonalen ³ 0,020 mm anwendbar.
Matériaux métalliques - Essai de dureté Knoop - Partie 3: Etalonnage des blocs de référence (ISO 4545-3:2005)
L'ISO 4545-3:2005 spécifie la méthode pour l'étalonnage des blocs de référence à utiliser pour la vérification indirecte des machines d'essai de dureté Knoop conformément à l'ISO 4545-2.
La méthode s'applique uniquement pour les empreintes de longue diagonale supérieure ou égale à 0,020 mm.
Kovinski materiali – Preskus trdote po Knoopu – 3. del: Umerjanje primerjalnih ploščic (ISO 4545-3:2005)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2006
.RYLQVNLPDWHULDOL±3UHVNXVWUGRWHSR.QRRSX±GHO 8PHUMDQMHSULPHUMDOQLK
SORãþLF ,62
Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks (ISO
4545-3:2005)
Metallische Werkstoffe - Härteprüfung nach Knoop - Teil 3: Kalibrierung der
Härtevergleichsplatten (ISO 4545-3:2005)
Matériaux métalliques - Essai de dureté Knoop - Partie 3: Etalonnage des blocs de
référence (ISO 4545-3:2005)
Ta slovenski standard je istoveten z: EN ISO 4545-3:2005
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 4545-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS 77.040.10
English Version
Metallic materials - Knoop hardness test - Part 3: Calibration of
reference blocks (ISO 4545-3:2005)
Matériaux métalliques - Essai de dureté Knoop - Partie 3: Metallische Werkstoffe - Härteprüfung nach Knoop - Teil 3:
Etalonnage des blocs de référence (ISO 4545-3:2005) Kalibrierung der Härtevergleichsplatten (ISO 4545-3:2005)
This European Standard was approved by CEN on 28 October 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
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Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4545-3:2005: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 4545-3:2005) has been prepared by Technical Committee ISO/TC 164
"Mechanical testing of metals" in collaboration with Technical Committee ECISS/TC 1 "Steel -
Mechanical testing", the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by May 2006, and conflicting national standards
shall be withdrawn at the latest by May 2006.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 4545-3:2005 has been approved by CEN as EN ISO 4545-3:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 4545-3
First edition
2005-11-15
Metallic materials — Knoop hardness
test —
Part 3:
Calibration of reference blocks
Matériaux métalliques — Essai de dureté Knoop —
Partie 3: Étalonnage des blocs de référence
Reference number
ISO 4545-3:2005(E)
©
ISO 2005
ISO 4545-3:2005(E)
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ii © ISO 2005 – All rights reserved
ISO 4545-3:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Manufacture of the block . 1
4 Calibration machine. 2
5 Calibration procedure. 3
6 Number of indentations. 3
7 Uniformity of hardness. 3
8 Marking . 4
9 Validity . 4
Annex A (informative) Adjustment of Kohler illumination systems. 5
Annex B (informative) Uncertainty of measurement of hardness-reference blocks. 6
Bibliography . 9
ISO 4545-3:2005(E)
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. Each 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, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 4545-3 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 3, Hardness testing.
ISO 4545-3 cancels and replaces the first edition of ISO 4547:1993, which has been technically revised.
ISO 4545 consists of the following parts, under the general title Metallic materials — Knoop hardness test:
— Part 1: Test method
— Part 2:Verification and calibration of testing machines
— Part 3: Calibration of reference blocks
— Part 4: Table of hardness values
iv © ISO 2005 – All rights reserved
INTERNATIONAL STANDARD ISO 4545-3:2005(E)
Metallic materials — Knoop hardness test —
Part 3:
Calibration of reference blocks
1 Scope
This part of ISO 4545 specifies the method for the calibration of reference blocks to be used for the indirect
verification of Knoop hardness testing machines as specified in ISO 4545-2.
The method is applicable only for indentations with long diagonals W 0,020 mm.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 376:2004, Metallic materials — Calibration of force-proving instruments used for the verification of
uniaxial testing machines
ISO 4287:1997, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms,
definitions and surface texture parameters
ISO 4545-1:2005, Metallic materials — Knoop hardness test — Part 1: Test method
ISO 4545-2, Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing
machines
3 Manufacture of the block
3.1 The block shall be specially manufactured for use as a hardness-reference block.
NOTE Attention is drawn to the need to use a manufacturing process which will give the necessary homogeneity,
stability of structure and uniformity of surface hardness.
3.2 The reference block thickness shall be greater than twenty times the depth of indentation made with the
certified test force.
3.3 The reference blocks shall be free of magnetism.
3.4 The maximum deviation in flatness of the surfaces shall not exceed 0,005 mm.
3.5 The maximum error in parallelism shall not exceed 0,010 mm/50 mm.
ISO 4545-3:2005(E)
3.6 The test surface shall be free from scratches which interfere with the measurement of the indentations.
The surface roughness Ra shall not exceed 0,1 µm for the test surface. The sampling length L shall be
0,80 mm (see ISO 4287:1997, 3.1.9).
3.7 To verify that no material is subsequently removed from the reference block, the thickness at the time of
calibration shall be marked on it, to the nearest 0,1 mm, or an identifying mark shall be made on the test
surface [see 8.1.e)].
4 Calibration machine
4.1 In addition to fulfilling the general requirements specified in ISO 4545-2, the calibration machine shall
also meet the requirements given in 4.2 to 4.7.
NOTE Examples of procedures for adjustment of illumination systems are given in Annex A.
4.2 The machine shall have been directly verified in intervals not exceeding 12 months.
Direct verification involves:
a) calibration of the test force;
b) verification of the indenter;
c) calibration of the measuring device;
d) verification of the testing cycle; if this is not possible, at least the force versus time behaviour.
4.3 The instruments used for verification and calibration shall be traceable to national standards.
4.4 Each test force shall be measured three times using an elastic proving device (of ISO 376:2004,
Class 0,5 or better), or by another method having the same or better accuracy. Each measurement shall
agree with the nominal value to within ± 0,5 %.
4.5 The indenter shall meet the following requirements:
a) The four faces of the diamond pyramid shall be highly polished and free from surface defects.
b) The angles α and β (see ISO 4545-1:2005, Figure 1), between opposite edges at the vertex of the
diamond pyramid, shall be (172,5 ± 0,1)° and (130 ± 0,1)°.
The angle between the axis of the diamond pyramid and the axis of the indenter holder (normal to the seating
surface) shall not exceed 0,3°. The four faces shall meet at a point; the length of any common junction
between opposite faces being less than 0,3 µm.
4.6 The device for measuring the diagonal of the indentation shall permit estimation of the length of the
diagonal to within ± 0,1 µm.
The measuring device shall be calibrated against an accurately ruled line-scale (object micrometer) or a
device of equivalent accuracy. The errors of the line-scale shall be known within an uncertainty of 0,02 µm.
The maximum permissible error of the measuring device shall be ± 0,08 % or 0,3 µm, whichever is greater.
4.7 The maximum allowable vibrational acceleration reaching the machine shall be less than 0,005 g
n
[g being the acceleration due to gravity (g = 9,806 65 m/s )].
n n
2 © ISO 2005 – All rights reserved
ISO 4545-3:2005(E)
5 Calibration procedure
The reference blocks shall be calibrated in a calibration machine as specified in Clause 4, at a temperature of
(23 ± 5) °C, using the general procedure described in ISO 4545-1.
During calibration, the thermal drift should not exceed 1 °C.
The time from the initial applic
...
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