AS 1815.3-2007 Metallic materials—Rockwell hardness test Method 3 Calibration of reference blocks (scales A,B,C,D,E,F,G,H,K,N,T)(ISO 6508-32005, MOD).pdf.pdf
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1、 AS 1815.32007 Australian Standard Metallic materialsRockwell hardness test Method 3: Calibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-3:2005, MOD) PREFACE This Standard was prepared by the Standards Australia Committee MT-006, Mechanical Testing of Metals to supers
2、ede in part AS 1815.32002, Metallic materialsRockwell hardness test, Method 3: Calibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T). This Standard is an adoption with national modifications and is reproduced from ISO 6508-3:2005 Metallic materialsRockwell hardness test, Part 3: C
3、alibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T). Variations to the ISO text for Australia are set out in Appendix ZZ. Changes to the ISO text are indicated by a marginal bar. This Standard modifies ISO 6508-3 to conform with established Australian practices for hardness testi
4、ng. This Standard is one of a series of Standards covering the range of hardness testing methods. The series comprises of the follow: AS 1815 Metallic materialsRockwell hardness test 1815.1 Method 1: Test method scales (scales A, B, C, D, E, F, G, H, K, N, T) 1815.2 Method 2: Verification and calibr
5、ation of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) 1815.3 Method 3: Calibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-3:2005, MOD) (this Standard) 1816 Metallic materialsBrinell hardness test 1816.1 Method 1: Test method (ISO 6506-1:2005, MOD) 1816.2
6、Method 2: Verification and calibration of testing machines 1816.3 Method 3: Calibration of reference blocks 1816.4 Method 4: Table of hardness values 1817 Metallic materialsVickers hardness test 1817.1 Method 1: Test method (ISO 6507-1:1997, MOD) 1817.2 Method 2: Verification of testing machines 181
7、7.3 Method 3: Calibration of reference blocks 5016 Metallic materialsConversion of hardness values AS 1815.32007 i i As this Standard is reproduced from an international standard, the following applies: (a) Its number appears on the cover and title page while the international standard number appear
8、s only on the cover (b) In the source text this part of ISO 6508 should read this Australian Standard. (c) A full point substitutes for a comma when referring to a decimal marker. References to International Standards should be replaced by references to Australian or Australian/New Zealand Standards
9、, as follows: Reference to International Standard Australian Standard ISO AS 376 Metallic materialsCalibration of force-proving instruments used for verification of uniaxial testing machines 2193 Calibration and classification of force measuring systems 4287 Geometrical production specifications (GP
10、S)Surface texture: Profile methodsTerms definitions and surface texture parameters 6508 Metallic materialsRockwell hardness test 1815 Metallic materialsRockwell hardness test 6508-1 Part 1: Test method scales A, B, C, D, E, F, G, H, K, N, T) 1815.1 Method 1: Test method (scales A, B, C, D, E, F, G,
11、H, K, N, T) 6508-2 Part 2: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) 1815.2 Method 3: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) The terms normative and informative have been used in this Standard to defin
12、e the application of the annex to which they apply. A normative annex is an integral part of a standard, where an informative annex is only for information and guidance. ii ii INTERNATIONAL STANDARD ISO 6508-3:2005(E) ISO 2005 All rights reserved 1 Metallic materials Rockwell hardness test Part 3: C
13、alibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T) 1 Scope This part of ISO 6508 specifies a method for the calibration of reference blocks to be used for the indirect verification of Rockwell hardness testing machines (scales A, B, C, D, E, F, G, H, K, N, T), as specified in IS
14、O 6508-2. 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, Me
15、tallic materials Calibration of force-proving instruments used for verification of uniaxial testing machines ISO 4287:1997, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters ISO 6508-1, Metallic materials Rockwell hardness test
16、 Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 6508-2, Metallic materials Rockwell hardness test Part 2: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) 3 Manufacture of reference blocks 3.1 The block shall be specially manufactured for us
17、e 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 6 mm. Reference blocks
18、 should have a thickness of 6 mm to 16 mm. To minimize the effect of hardness change with increasing number of indents, a minimum thickness of 12 mm should be used for steel. For other materials, different thicknesses could be used. 3.3 The reference blocks shall be free of magnetism. It is recommen
19、ded that the manufacturer ensure that the blocks, if made of steel, have been demagnetized at the end of the manufacturing process (before calibration). 1 1 ISO 6508-3:2005(E) 2 ISO 2005 All rights reserved 3.4 The tolerance in flatness of the surfaces shall not exceed 0,01 mm. The bottom of the blo
20、cks shall not be convex. The tolerance parallelism shall not exceed 0,02 mm on 50 mm. 3.5 The test and lower surfaces shall be free from damage, such as notches, scratches, oxide layers, etc., which interfere with the measurement of the indentations. The surface roughness Ra shall not exceed 0,000 3
21、 mm for the test surface and 0,000 8 mm for the bottom surface: sampling length l = 0,8 mm (see ISO 4287:1997, 3.1.9). 3.6 To verify that no material is subsequently removed from the reference block, the thickness at the time of calibration shall be marked on it, to the nearest 0,1 mm, or an identif
22、ying mark shall be made on the test surface see 8.1 e). 4 Calibration machine 4.1 In addition to fulfilling the general conditions specified in Clause 3 of ISO 6508-2:2005, the calibration machine shall also meet the requirements given in 4.2 to 4.8. 4.2 The machine shall be verified directly in int
23、ervals not exceeding 12 months. Direct verification involves: a) calibration of the test force; b) verification of the indenter; the verification period can be extended for up to 5 years, if the indenter is verified for performance against at least one other reference indenter at intervals not excee
24、ding 12 months; c) calibration of the measuring system; d) verification of the testing cycle; if this is not possible, at least the force versus time behaviour. 4.3 The instruments used for the verification and calibration of the calibration machine shall be traceable to national standards. 4.4 “Eac
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