ISO 4545-3:2017 金属材料—ヌープ硬度試験—パート3：参照ブロックの校正 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing.

This second edition cancels and replaces the third edition (ISO 4545-3:2005), which has been technically revised.

Significant technical changes from the previous edition of this document include:

• the requirements for the maximum test surface area of the reference block have been added;
• the requirements for the maximum uncertainty of the line intervals on the stage micrometer have been revised;
• the requirements for the calibration and verification of the measuring system have been revised, as per ISO 4545-2;
• the requirements for the uniformity of the reference block hardness have been revised to account for different numbers of calibration indentations;
• the timing requirements for the approach velocity and the time duration at maximum test force have been revised to indicate a target time value;
• Annex B has been revised

A list of all parts in the ISO 4545 series can be found on the ISO website.

1 Scope

This document 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 ≥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 of the referenced document (including any amendments) applies.

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:

Bibliography