ISO 4545-2:2017 金属材料—ヌープ硬度試験—パート2：試験機の検証と校正 | 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 first edition (ISO 4545-2:2005), which has been technically revised.

The main changes compared to the previous edition are as follows:

• all references have been removed of indentation diagonals <0,020 mm;
• the requirements for the calibration and verification of the measuring system have been revised;
• the requirements for the maximum permissible error in measuring a reference indentation have been revised;
• the recommendations for inspection and monitoring of the indenter have been moved to ISO 4545-1;
• Annex A 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 of verification and calibration of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545-1.

A direct method of verification and calibration is specified for the testing machine, indenter, and the diagonal length measuring system. An indirect verification method using reference blocks is specified for the overall checking of the machine.

If a testing machine is also to be used for other methods of hardness testing, it will be verified independently for each method.

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