1.1本试验方法包括测定粉末冶金（P/M）零件的显微硬度，以及显微硬度试验结果在测定表面深度方法中的应用。还概述了通过观察测量粉末冶金零件表面深度的技术。 1.2 A部分:显微硬度测量本程序涵盖了使用努氏（HK）或维氏（HV）压头测定粉末冶金零件显微硬度的试验方法。包括在显微硬度测量之前粉末冶金材料的表面处理程序。 1.3 B部分:包括用于确定粉末冶金零件的有效硬化层深度和观察硬化层深度的硬化层深度测量程序和方法。利用A部分关于显微硬度测量的原理测量表面深度。 1.4以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 1.5本标准无意解决与其使用相关的安全问题。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This test method covers determination of the microhardness of powder metallurgy (P/M) parts and applications of microhardness test results to methods for determination of the case depth. Technique for measurement of case depth of P/M parts by observation is also outlined. 1.2 Part A: Microhardness Measurement-This procedure covers test methods to determine the microhardness of P/M parts with the Knoop (HK) or the Vickers (HV) indenters. Procedures for surface preparation of the P/M material prior to microhardness measurement are included. 1.3 Part B: Case Depth Measurement-Procedures and methods for determination of both effective case depth and observed case depth for P/M parts are included. The principles of Part A on Microhardness Measurement are utilized to measure case depth. 1.4 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only. 1.5 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.