INTERNATIONAL STANDARD ISO 6507-3:2005(E)

Metallic materials — Vickers hardness test —

Part 3:

Calibration of reference blocks

ISO 6507 consists of the following parts, under the general title Metallic materials —— Vickers hardness test:

ISO 6507-1 Metallic materials —— Vickers hardness test Part 1: Test method

ISO 6507-2 Metallic materials —— Vickers hardness test Part 2: Verification and calibration of testing machines and indenters

ISO 6507-3 Metallic materials —— Vickers hardness test Part 3: Calibration of refernce blocks

ISO 6507-4 Metallic materials —— Vickers hardness test Part 4: Table of hardness values

标准状态：已作废

替代情况：被 ISO 6507-3：2018替代

Contents

Foreword

1 Scope

2 Normative references

3 Manufacture of reference blocks

4 Calibration machine

5 Calibration procedure

6 Number of indentations

7 Uniformity of hardness

8 Marking

9 Validity

Annex A (informative) Uncertainty of the mean hardness value of hardness-reference blocks

Bibliography

1  Scope

This part of ISO 6507 specifies a method for the calibration of reference blocks to be used for the indirect

verification of Vickers hardness testing machines, as specified in ISO 6507-2.

The method is applicable only for indentations with 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 6507-1:2005，Metallic materials — Vickers hardness test — Part 1: Test method

ISO 6507-2:2005，Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing

machines

3  Manufacture of reference blocks

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 Each metal block to be calibrated shall be of a thickness not less than 5 mm.

3.3 The reference blocks shall be free of magnetism. lt is recommended that the manufacturer shall ensure

that the blocks, if made of steel, have been demagnetized at the end of the manufacturing process.

3.4 The maximum deviation in flatness of the test and support surfaces shall not exceed 0,005 mm. The

maximum error in parallelism shall not exceed 0,010 mm in 50 mm.

3.5 The test surface shall be free from scratches which interfere with the measurement of the indentations.

The surface roughness Ra shall not exceed 0,000 05 mm for the test surface and 0,000 8 mm for the bottom

surface. The sampling length l shall be 0,80 mm (see ISO 4287:1997, 3.1.9).

3.6 To verify that no material has been subsequently removed from the reference block, its thickness at the

time of calibration shall be marked on it, to the nearest 0,01 mm, or an identifying mark shall be made on the

test surface [see 8.1 e)].

相关标准

国家标准GB/T 4340.3-2012《金属材料 维氏硬度试验 第3部分:标准硬度块的标定》

       本标准使用重新起草法修改采用ISO6507-3:2005《金属材料 维氏硬度试验 第3部分:标准硬度块的标定》(第三版),在文本结构和技术方面与ISO6507-3:2005一致。 

       本标准与ISO6507-3:2005的技术差异及其原因如下: 

       —— 删除了ISO6507-3:2005的前言,重新编写了前言; 

       —— 关于规范性引用文件,本标准做了具有技术性差异的调整,以适应我国的技术条件,调整的内容集中反映在第2章“规范性引用文件”中,具体调整如下: 

              ● 用等同采用国际标准的GB/T3505—2009代替ISO4287:1997(见3.5); 

              ● 用修改采用国际标准的GB/T4340.1代替ISO6507-1(见第5章和附录A); 

              ● 用修改采用国际标准的GB/T4340.2—2012代替ISO6507-2:2005(见第1章、4.1和A.1); 

              ● 用等同采用国际标准的GB/T13634代替ISO376(见4.4); 

       —— 增加了表题(见表1~表4); 

       —— 将7.1的式(2)中的符号“U ”用符号“J ”替换;将式(3)和表4中的符号“Urel”用符号“Jrel”替换; 

       —— 改正了附录A 中一些错误的计算结果和数据,并规范了向公式中代入数值的算式的表达方法; 

       —— 删除了参考文献。 

       本标准还做了下列编辑性修改: 

       —— 将“ISO6507的本部分”一词改为“本部分”; 

       —— 用中文的小数点符号“.”代替英文的小数点符号“,”。