標準號：ISO 4545-2-2005
中文標準名稱：金屬材料.努氏硬度試驗.第2部分:試驗機的驗證和校準
英文標準名稱：Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines
標準類型：H22
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：H22
國際標準分類號：77.040.10
適用范圍：This part of ISO 4545 specifies the method of verification of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545-1-1. It covers test forces from 0,098 07 N to 19,614 N. The method is recommended only for indentations with diagonals ≥ 0,020 mm. It specifies a direct verification method for checking the main functions of the machine, and an indirect verification method suitable for the overall checking of the machine. The indirect verification method may be used on its own for periodic routine checking of the machine in service. If a testing machine is also to be used for other methods of hardness testing, it should be verified independently for each method.