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

標(biāo)準(zhǔn)狀態(tài)：已作廢

替代情況：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.

相關(guān)標(biāo)準(zhǔn)

國家標(biāo)準(zhǔn)GB/T 4340.2-2012《金屬材料 維氏硬度試驗(yàn) 第2部分：硬度計(jì)的檢驗(yàn)與校準(zhǔn)》

       本部分使用重新起草法修改采用國際標(biāo)準(zhǔn)ISO6507-2:2005《金屬材料 維氏硬度試驗(yàn) 第2部分:硬度計(jì)的檢驗(yàn)與校準(zhǔn)》(第三版),在文本結(jié)構(gòu)和技術(shù)內(nèi)容方面與ISO6507-2:2005一致。 

       本部分與ISO6507-2:2005的技術(shù)性差異及其原因如下: 

       —— 刪除了ISO6507-2:2005的前言,重新編寫了前言; 

       —— 關(guān)于規(guī)范性引用文件,本部分作了具有技術(shù)性差異的調(diào)整,以適應(yīng)我國的技術(shù)條件,調(diào)整的內(nèi)容集中反映在第2章“規(guī)范性引用文件”中,具體調(diào)整如下: 

              ● 用修改采用國際標(biāo)準(zhǔn)的GB/T4340.1代替ISO6507-1(見第1章、4.5、5.5和附錄B); 

              ● 用修改采用國際標(biāo)準(zhǔn)的GB/T4340.3代替ISO6507-3(見5.1); 

              ● 用等效采用國際標(biāo)準(zhǔn)的GB/T7997代替ISO3878(見4.4.1); 

              ● 用等同采用國際標(biāo)準(zhǔn)的GB/T13634代替ISO376(見4.2.3); 

       —— 增加了表題(見表1~表6); 

       —— 增加了4.3的注和5.2的注; 

       —— 修改了4.5試驗(yàn)循環(huán)時(shí)間的最大允許誤差的技術(shù)指標(biāo),由“±1.0s”修改為“±0.5s”(見4.5和附錄B.1.4); 

       —— 將表6中的“×”改為“√”; 

       —— 改正了附錄B 中一些錯(cuò)誤的計(jì)算結(jié)果和數(shù)據(jù),并規(guī)范了向公式中代入數(shù)值的算式的表達(dá)方法; 

       —— 將附錄B中式(B.10)和表B.9中的符號(hào)“b”用符號(hào)“E”替換; 

       —— 刪除了參考文獻(xiàn)。 

       本部分與ISO6507-2:2005相比存在技術(shù)性差異,這些差異涉及的條款已通過在其外側(cè)頁邊空白位置的垂直單線(│)進(jìn)行了標(biāo)示。 

       本部分還做了下列編輯性修改: 

       —— 將“ISO6507的本部分”一詞改為“本部分”; 

       —— 用中文的小數(shù)點(diǎn)符號(hào)“.”代替英文的小數(shù)點(diǎn)符號(hào)“,”。