(20-70)HRC规格的洛氏硬度计检测管理数据
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该检测数据适用于市面上各企业生产销售的(20-70)HRC规格的洛氏硬度计的检测及性能评价。科学反映数据的真实可靠，为产品性能是否合格提供更精确保障，为政府监管、企业采购(20-70)HRC规格的洛氏硬度计提供参考和技术支撑。1、取（20～70）HRC之间的标准硬度块检定硬度计示值时，测定五点，得到五个硬度计示值，再按照以下公式取得各值： 硬度计示值平均值=（硬度计示值1+硬度计示值2+硬度计示值3+硬度计示值4+硬度计示值5）/5； 示值误差=硬度值与硬度计示值平均值之差； 示值重复性=五点中最大与最小硬度计示值之差。 2、按照JJG112-2013《金属洛氏硬度计检定规程》规定，(20-70)HRC规格的洛氏硬度计示值最大允许误差为±1.5、示值重复性允许最大值为0.8，当两者数据都符合该要求，则判定为合格。
This detection dataset is applicable to the detection and performance evaluation of Rockwell hardness testers with the (20–70) HRC specification manufactured and sold by various enterprises on the current market. It scientifically ensures the authenticity and reliability of the collected data, provides more accurate validation for whether the product performance meets qualified standards, and offers reference and technical support for government supervision and enterprise procurement of Rockwell hardness testers with the (20–70) HRC specification. 1. When using standard hardness blocks with hardness values ranging from 20 to 70 HRC to calibrate the indication of a Rockwell hardness tester, perform five measurements to obtain five sets of tester indication readings, then calculate relevant metrics via the following formulas: Average indication reading of the hardness tester = (Indication reading 1 + Indication reading 2 + Indication reading 3 + Indication reading 4 + Indication reading 5) / 5; Indication error = The difference between the standard hardness value and the average indication reading of the hardness tester; Indication repeatability = The difference between the maximum and minimum indication readings of the hardness tester among the five measured points. 2. Per JJG 112-2013 *Verification Regulation for Metal Rockwell Hardness Testers*, the maximum permissible indication error for Rockwell hardness testers with the (20–70) HRC specification is ±1.5, and the maximum allowable indication repeatability is 0.8. A Rockwell hardness tester is deemed qualified only when both of the above two metrics meet the stipulated requirements.
