|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Application of Solidification Fundamentals to Challenges in Metal Additive Manufacturing
||Microstructure and Wear Resistance of Laser Deposited Cobalt-free Cu-based Alloy for Valve Seat Application
||Hajime Kato, Tadashi Oshima, Kouji Tanaka, Minoru Kawasaki, Natsuki Sugiyama, Hironori Aoyama
|On-Site Speaker (Planned)
Microstructure and wear resistance of the laser deposited Cu-based alloys were investigated for valve seat applications. In the laser processing, Cu-based alloy powder is supplied and directly deposited onto an aluminum alloyed cylinder head by high power laser, in order to provide high thermal conductivity and wear resistance to the valve seat. Liquid immiscibility in the Cu-Co system has been utilized for microstructural control to disperse hard particles in the matrix phase, during the extremely short period in the processing. The newly developed Cu-based alloy also shows liquid immiscibility at high temperatures, without containing Co. The laser deposited alloy showed excellent wear resistance mainly due to the large amount of hard particles. Microstructural observations revealed that the hard particles consisted of ultrafine multiple phases such as Laves phase. Alloy design and phase transitions during rapid cooling in the process will be discussed in detail.
||Planned: Supplemental Proceedings volume