標(biāo)題: ASTM B 931-2003 鐵粉末冶金(P/M)部件金相估計(jì)的觀測... [打印本頁] 作者: 兌水 時(shí)間: 2009-9-15 15:27 標(biāo)題: ASTM B 931-2003 鐵粉末冶金(P/M)部件金相估計(jì)的觀測... B931-03 Standard Test Method for Metallographically Estimating the Observed Case Depth of Ferrous Powder Metallurgy (P/M) Parts