GB/T 32660.3-2016 in English
VALIDMetallic materials—Webster hardness test—Part 3: Calibration of reference blocks
- Issued on:2016-06-14
- Implemented on:2017-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 32660.3-2016 |
| Document status: | VALID |
| Title in English: | Metallic materials—Webster hardness test—Part 3: Calibration of reference blocks |
| Title in Chinese: | 金属材料 韦氏硬度试验 第3部分：标准硬度块的标定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-06-14 |
| Implemented on: | 2017-01-01 |
| Chinese Classification: | N71-Metal material testing machine |
| Professional Classification: | GB-National Standard |
| Related Topics: | Metal Material Hardness Tester
Hardness tester standard machine Hardness Metal Hardness Tester t hardness standard block Leeb hardness test Standard Hardness Block hardness german GB/T 32660.3 GB/T 32660.3-2016 Core hardness Hard drive standards acs-2 and acs-3 National standard metal material density Graduation value of Brinell hardness tester standard block |
《GB/T 32660.3-2016金属材料 韦氏硬度试验 第3部分：标准硬度块的标定》由TC122（全国试验机标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
GB/T32660.3-2016 Standard Overview
GB/T32660.3-2016 "Metallic Material Webster Hardness Test Part 3: Calibration of Standard Hardness Blocks" is a Chinese national standard used to regulate the manufacturing, calibration and use requirements of standard hardness blocks in the Webster hardness test of metallic materials.
Comparison of Standard Frameworks
| Dimensions | GB/T32660.1-2016 | GB/T32660.2-2016 | GB/T32660.3-2016 |
|---|---|---|---|
| Scope | Test Method | Hardness Tester Calibration | Standard Block Calibration |
| Core Content | Test Operation Specifications | Instrument Calibration Process | Technical Requirements for Standard Blocks |
| Applicable Scenarios | Production site test | Equipment calibration laboratory | Standard formulation and management |
Technical requirements for standard hardness blocks
1. Manufacturing process: The standard block should have homogeneity, structural stability and surface hardness uniformity to ensure the reliability of the test results.
2. Geometric dimensions: Table 1 specifies the length, width, thickness, flatness and parallelism requirements of the standard block, among which the flatness of the test surface and the support surface should be ≤0.10mm.
3. Hardness range: Table 2 clarifies the hardness range and uniformity requirements under different hardness tester types, for example, the uniformity of type A hardness tester should be ≤0.5HWA.
Calibration method and technical details
- Calibration conditions: The standard block should be calibrated within the temperature range of (23±5)℃ to ensure the stability of the measurement environment.
- Number of indentations: Five indentations should be evenly distributed on the test surface of each standard block to calculate the arithmetic mean of the hardness value.
- Hardness conversion: The Webster hardness (HW) and Rockwell hardness (HRE) are compared with each other through the conversion table in Appendix B to ensure the traceability of the test results.
Measurement uncertainty analysis
The measurement uncertainty evaluation of the average hardness value of the standard block includes the following steps:
- Mathematical model: Establish a conversion error model to determine the relationship between various influencing factors.
- Input quantity analysis: Evaluate the effects of the indication repeatability of the standard Rockwell hardness machine and the calibration results of the reference block on the final measurement uncertainty.
- Combined calculation: Use formula (A.2) to calculate the combined standard uncertainty, and determine the expanded uncertainty based on the coverage factor k=2.
Implementation suggestions
1. Choose a suitable hardness tester: According to the type and requirements of the test material, select a Webster hardness tester that meets the GB/T32660 series standard.
2. Regularly calibrate the equipment: According to the requirements of GB/T32660.2, regularly calibrate the hardness tester to ensure measurement accuracy.
3. Establish a quality management system: Develop procedures for the use, storage and maintenance of standard blocks to ensure long-term consistency of test results.
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