ASTM B721-91(1999)被替代
Standard Test Method for Microhardness and Case Depth of Powder Metallurgy (P/M) Parts
出版：American Society for Testing and Materials
專家解讀視頻
CONTAINED IN VOL 02.05, 2001Determines microhardness of powder metallurgy (P/M) parts and applications of microhardness test results to methods for determining case depth. Also describes the technique for measurement of case depth of P/M parts by observation.Part A - Microhardness Measurement - This method deals with procedures for determining microhardness of P/M parts with the Vickers (HV) or the Knoop (HK) indenters. Part B - Case Depth Measurement - Methods and procedures to determine effective case depth and observed case depth for P/M parts are covered. Principles of Part A are used for measuring case depth.
