鄂州AC36/1213ER.41SGB产品编码0541143

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丹麦PR 一般说来，按照人们习惯上的概念，数值越大，硬度越高。因此采用一个常数c减去h来表示硬度的高低。并用每.2㎜的压痕深度为一个硬度单位。由此获得的硬度值称为洛氏硬度值，用符号HR表示。式中，c为常数（对于HRHRA，c取.2；对于HRB，c取.26）。由此获得的洛氏硬度值HR为一无名数，试验时一般由试验机指示器上直接读出。常用洛氏硬度标尺及适用范围上述洛氏硬度的三种标尺中，以HRC应用多，一般经淬火处理的钢或工具都采用HRC测量。