Microstructure Analysis of Microwave Sintered Ferrous PM Alloys

作     者：彭远东 易健宏 PENG Yuandong, YI Jianhong*, LUO Shudong, GUO Yingli, LI Liya (State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China)

作者机构：State Key Laboratory for Powder Metallurgy Central South University 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2009年第24卷第2期

页      面：214-217页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：Funded by the National Science and Technology Development Program (No.2004-09ZD) 

主　　题：microwave sintering Fe-Cu-C PM alloys mechanical property microstructure 

摘      要：The properties and microstructure of microwave and conventional sintered Fe-2Cu-0.6C powder metallurgy （PM） alloys were investigated. The experimental results show that microwave sintered alloy has the better properties （sintered density 7.20 g/cm3, Rockwell hardness 75 HRB, tensile strength 413.90 MPa and elongation 6.0%）, compared with the conventional sintered counterpart. Detailed analyses by using optical microscopy and scanning electron microscopy （SEM） reveal that microwave sintered sample has finer microstructure with small, rounded and uniformly distributed pores, and also demonstrate the presence of more flaky and granular pearlite in the mi- crowave sintered body, both of which account for the property improvement. SEM images on the fracture morphology indicate that a mixed mode containing ductile and brittle fracture is presented in microwave sintered alloy, in contrast with the brittle fracture in conventional sintered counterpart.