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GB/T 21838.3-2022: Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 3: Calibration of reference blocks
Status: Valid GB/T 21838.3: Evolution and historical versions
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| GB/T 21838.3-2022 | English | 229 |
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Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 3: Calibration of reference blocks
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GB/T 21838.3-2022
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| GB/T 21838.3-2008 | English | 399 |
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Metallic materials -- Instrumented indentation test for hardness and materials parameter -- Part 5: calibration of reference blocks
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GB/T 21838.3-2008
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Basic data | Standard ID | GB/T 21838.3-2022 (GB/T21838.3-2022) | | Description (Translated English) | Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 3: Calibration of reference blocks | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N71 | | Word Count Estimation | 11,192 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 21838.3-2008: Metallic materials -- Instrumented indentation test for hardness and materials parameter -- Part 5: calibration of reference blocks
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Metallic materials Instrumented indentation test for hardness and materials parameter Part 5. Calibration of reference blocks
ICS 19.060; 77.040.10
N71
National Standards of People's Republic of China
Metallic material hardness and materials parameters
Instrumented indentation test
Part 3. Calibration of reference blocks
(ISO 14577-3.2002, MOD)
Posted 2008-06-20 2009-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
Please note that some of the content of this standard may involve patents, the issuing authority of this standard should not bear the responsibility to identify these patents.
GB/T 21838 "metal hardness and materials parameters - Instrumented indentation test" is divided into four parts.
--- Part 1. Test methods;
--- Part 2. Verification and calibration of testing machines;
--- Part 3. Calibration of reference blocks;
--- Part 4. Test methods for metallic and non-metallic coating layer.
This section GB/T 21838 Part 3.
The partial modification of international standard ISO 14577-3.2002 "Instrumented indentation metal hardness and materials parameters Test 3
Parts. standard calibration block "(first edition in English).
This part is based on the ISO 14577-3.2002 drafted using the translation method, in terms of technical content and structure of the text with ISO 14577-3.
2002 consensus, but in accordance with the relevant provisions of the preparation of standards made the following editorial changes.
--- With "GB/T 21838 in this section," instead of "this part of ISO 14577";
"." --- With the Chinese instead of English usual decimal notation using decimal notation, "";
--- Re-write the foreword, instead of ISO 14577-3.2002 Foreword;
--- In Chapter 2, "Normative references" in direct reference to the ISO 14577-3.2002 international standard referenced in the corresponding
China's national standard.
Appendix A of this section is an informative annex.
This part is proposed by China Machinery Industry Federation.
This part of the National Technical Committee of Standardization Testing Machine (SAC/TC122) centralized.
This section is drafted. Changchun Testing Machine Institute, Shanghai nano-technology incubators, Steel Research Institute, Shanghai Institute of Materials.
The main drafters of this section. Jin Hongbo, Yang Li, Wang Bin, TESTING AND.
Introduction
The classic definition of hardness is a material resistant to other hard material capable of producing permanent indentation indentation. Rockwell, Vickers and cloth
S test results obtained when the test force is determined after dismount. Thus, ignoring the effect of indentation at the head of elastic deformation
influences.
GB/T 21838 formulation, allows users to plastic and elastic deformation of the material through research the relationship between force and deformation
To assess the material indentation. Through the entire cycle of monitoring and removal of the test force, capable of measuring the hardness value equivalent to traditional hardness values.
Importance is also capable of measuring such as indentation modulus and elastic - plastic hardness and some extra material properties, without the use of an optical method
Indentation measurement, these values \u200b\u200bcan be calculated.
GB/T 21838 to the development of the data after the various tests carried out in-depth analysis.
Metallic material hardness and materials parameters
Instrumented indentation test
Part 3. Calibration of reference blocks
1 Scope
This section GB/T 21838 in accordance with the provisions of GB/T 21838.2-2008 provisions indirect test of the instrumented indentation testing machine
The calibration standard blocks.
NOTE. The standard testing machine can block applications or material parameters For determination of calibration.
2 Normative references
The following documents contain provisions which, through reference GB/T 21838 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 3505 Geometrical product specification the term structure of the surface contours of the surface structure of the law, definitions and parameters
(GB/T 3505-2000, eqv ISO 4287.1997)
GB/T 13634 uniaxial testing machines standard dynamometer calibration (GB/T 13634-2008, ISO 376.2004, Metalic
materials-Calibrationofforce-provinginstrumentsusedfortheverificationofuniaxialtesting
machines, IDT)
Instrumented indentation test - Part 1 GB/T 21838.1-2008 metal hardness and materials parameters. Test methods
(ISO 14577-1.2002, MOD)
GB/T 21838.2-2008 metal hardness and materials parameters - Instrumented indentation test - Part 2. testing machines
And calibration (ISO 14577-2.2002, MOD)
ISO GUM.1995 Guide to the Expression of Uncertainty in Measurement
Manufacturing 3 standard blocks
3.1 standard should be devoted to the preparation of the block, manufacturers will need to pay attention to the manufacturing process used to make standard block to obtain the necessary homogeneity, uniformity
And organizational stability.
The thickness of the standard block to be calibrated every 3.2 for nanometer range, not less than 2mm; for microscopic range, not less than 6mm; for
Conventional range, not less than 16mm.
NOTE. If the manufacturing process needs, the thickness can be reduced.
3.3 standard block should be non-magnetic, for the steel block, it is recommended to ensure that the manufacturer after demagnetization at the end of the manufacturing process.
Manufacturing 3.4 standard block shall be guaranteed within the limits when it is placed on the test machine, the tilt in GB/T 21838.1 requirements.
Note. If the standard block is the bearing surface on the test machine, you should meet the following conditions, the maximum deviation from flatness standard test block surface and the support surface does not exceed
Over 0.005mm/50mm, the maximum error does not exceed parallelism 0.010mm/50mm.
3.5 test surface shall not affect indentation scratches, indentations allow between scratches.
Conventional and microscopic range, the test plane surface roughness parameters R Rao should not exceed 15nm, supporting surface should not exceed 0.8μm, sampling length
Degree should be 0.80mm (see GB/T 3505).
Nano range, surface test surface roughness parameters R Rao should not exceed 10nm, if measured with an atomic force microscope (AFM), take
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