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
標準狀態(tài)：已作廢
替代情況：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)].
相關(guān)標準
國家標準GB/T 4340.3-2012《金屬材料 維氏硬度試驗 第3部分:標準硬度塊的標定》
本標準使用重新起草法修改采用ISO6507-3:2005《金屬材料 維氏硬度試驗 第3部分:標準硬度塊的標定》(第三版),在文本結(jié)構(gòu)和技術(shù)方面與ISO6507-3:2005一致。
本標準與ISO6507-3:2005的技術(shù)差異及其原因如下:
—— 刪除了ISO6507-3:2005的前言,重新編寫了前言;
—— 關(guān)于規(guī)范性引用文件,本標準做了具有技術(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:
● 用等同采用國際標準的GB/T3505—2009代替ISO4287:1997(見3.5);
● 用修改采用國際標準的GB/T4340.1代替ISO6507-1(見第5章和附錄A);
● 用修改采用國際標準的GB/T4340.2—2012代替ISO6507-2:2005(見第1章、4.1和A.1);
● 用等同采用國際標準的GB/T13634代替ISO376(見4.4);
—— 增加了表題(見表1~表4);
—— 將7.1的式(2)中的符號“U ”用符號“J ”替換;將式(3)和表4中的符號“Urel”用符號“Jrel”替換;
—— 改正了附錄A 中一些錯誤的計算結(jié)果和數(shù)據(jù),并規(guī)范了向公式中代入數(shù)值的算式的表達方法;
—— 刪除了參考文獻。
本標準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)點符號“.”代替英文的小數(shù)點符號“,”。
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