GB/T 17394.2-2022 Translated English of Chinese Standard (GB/T 17394.2-2022, GBT17394.2-2022): Metallic materials - Leeb hardness test - Part 2: Verification and calibration of hardness testershttps://www.chinesestandard.net, 18 may 2023 - 21 páginas This document specifies the methods for the direct inspection and indirect inspection of the Leeb hardness testers (hereinafter referred to as hardness testers) in accordance with GB/T 17394.1. The direct inspection is suitable for checking whether the performance parameters of the hardness testers are within the specified range. The indirect inspection is to use the hardness value of the reference Leeb hardness test blocks calibrated in accordance with GB/T 17394.3 to check the overall performance of the hardness testers in the direction of gravity. Indirect inspection can be independently applied to regular routine checks of in-use hardness testers. |
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accordance with Formula accordance with GB/T arithmetic mean balance balance balance ball head Block a HL calculated in accordance calibration certificate calibration results cobalt Coefficient of Variation density diameter dimensions and hardness direction of gravity display device Error of Indication fraction fraction fraction geometric dimensions hardness range hardness test block hardness value measured head shall protrude impact velocity indirect inspection Inspection of Hardness Inspection of Impact Inspection or calibration inspection report Leeb hardness test Leeb hardness unit Leeb hardness value Leeb Impact Device mass mass mass measured Leeb hardness Measurement Uncertainty measuring different positions n-cobalt cemente reference impact body reference Leeb hardness Relative Error S-type impact device satisfy the requirements shown in Table specified date specified in Table specified inspection conditions standard uncertainty introduced support ring synthetic diamond Table A.1 Technical Parameters temperature range Test Method GB/T Tungste n-cobalt Tungste Tungste Tungste n-cobalt Type of Impact Vickers Hardness Test