INTERNATIONAL STANDARD ISO 6507-2:2005(E)

Metallic materials — Vickers hardness test —
Part 2:
Verification and calibration of testing machines

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 6507-2：2018替代

Contents

Foreword
1 Scope
2 Normative references
3 General conditions
4 Direct verification
5 Indirect verification
6 Intervals between verifications
7 Verification report/calibration certificate
Annex A (informative) Notes on diamond indenters
Annex B (informative) Uncertainty of measurement of the calibration results of the hardness
testing machine
Bibliography


1  Scope

This part of ISO 6507 specifies a method of verification of testing machines for determining Vickers hardness
in accordance with ISO 6507-1.
It specifies a direct verification method for checking the main functions of the machine operation, and an
indirect method suitable for the overall checking of the machine. The indirect method may be used on its own
for periodic routine checking of the machine in service.
If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently
for each method.
This part of ISO 6507 is also applicable to portable hardness testing machines.


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, Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial
testing machines
ISO 3878, Hardmetals — Vickers hardness test
ISO 6507-1:2005，Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6507-3，Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks


3  General conditions

Before a Vickers hardness testing machine is verified, the machine shall be checked to ensure that it is
properly set up in accordance with the manufacturer's instructions:
Especially, it should be checked that:
a) the plunger holding the indenter is capable of sliding in its guide;
b) the indenter-holder is firmly mounted in the plunger;
c) the test force can be applied and removed without shock or vibration and in such a manner that the
readings are not influenced;
d) if the measuring system is integral with the machine
 —  the change from removing the test force to measuring mode does not influence the readings,
 —  illumination does not affect the readings,
 —  the centre of the indentation is in the centre of the field of view, if necessary.
The illumination device of the measuring microscope shall produce uniform lighting of the whole observed field
and maximum contrast between the indentation and the surrounding surface.

相关标准

国家标准GB/T 4340.2-2012《金属材料 维氏硬度试验 第2部分：硬度计的检验与校准》

       本部分使用重新起草法修改采用国际标准ISO6507-2:2005《金属材料 维氏硬度试验 第2部分:硬度计的检验与校准》(第三版),在文本结构和技术内容方面与ISO6507-2:2005一致。 

       本部分与ISO6507-2:2005的技术性差异及其原因如下: 

       —— 删除了ISO6507-2:2005的前言,重新编写了前言; 

       —— 关于规范性引用文件,本部分作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: 

              ● 用修改采用国际标准的GB/T4340.1代替ISO6507-1(见第1章、4.5、5.5和附录B); 

              ● 用修改采用国际标准的GB/T4340.3代替ISO6507-3(见5.1); 

              ● 用等效采用国际标准的GB/T7997代替ISO3878(见4.4.1); 

              ● 用等同采用国际标准的GB/T13634代替ISO376(见4.2.3); 

       —— 增加了表题(见表1~表6); 

       —— 增加了4.3的注和5.2的注; 

       —— 修改了4.5试验循环时间的最大允许误差的技术指标,由“±1.0s”修改为“±0.5s”(见4.5和附录B.1.4); 

       —— 将表6中的“×”改为“√”; 

       —— 改正了附录B 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; 

       —— 将附录B中式(B.10)和表B.9中的符号“b”用符号“E”替换; 

       —— 删除了参考文献。 

       本部分与ISO6507-2:2005相比存在技术性差异,这些差异涉及的条款已通过在其外侧页边空白位置的垂直单线(│)进行了标示。 

       本部分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“,”。