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ISO 4545-3:2017《金屬材料 努氏硬度試驗(yàn) 第3部分：標(biāo)準(zhǔn)硬度塊的標(biāo)定》國際標(biāo)準(zhǔn)（英文版）

INTERNATIONAL STANDARD ISO 4545-3ISO 4545-3-2017.jpg


Metallic materials — Knoop hardness test — 

Part 3: 

Calibration of reference blocks


ISO 4545 consists of the following parts, under the general title Metallic materials —— Knoop hardness test:

ISO 4545-1:2017, 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

ISO 4545-3:2017, Metallic materials — Knoop hardness test — Part 3: Calibration of reference blocks

ISO 4545-4, Metallic materials — Knoop hardness test — Part 4: Table of hardness values


替代情況：替代 ISO 4545-3：2005


Contents


Foreword

1. Scope 

2 Normative references

3 Terms and definitions

4 Manufacture of the reference block 

5 Calibration machine

6 Calibration procedure

7 Number of indentations

8 Uniformity of hardness

9 Marking 

10 Calibration certificate

11 Validity 

Annex A (informative) Adjustment of Kohler illumination systems

Annex B (informative) Uncertainty of measurement of hardness-reference blocks

Bibliography


1 Scope


This document specifies the method for the calibration of reference blocks to be used for the indirect verification ofKnoop hardness testing machines as specified in ISO 4545-2 .

The method is applicable only for indentations with long diagonals ≥0,020 mm.


2 Normative references


The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments)  applies.

ISO 376:2011, Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial testing machines

ISO 4545-1, 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 Terms and definitions


No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia:  available at http://www.electropedia.org/

— ISO Online browsing platform:  available at http://www.iso.org/obp





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