Development of Matrix Reinforced Valve Seat Materials with Improved Adhesive Wear Resistance
One of the requirements for valve seat,installed in automobile engines,is anti-adhesive wear properties.It is known that the formation of oxide films prevents adhesive wear.Due to recent progress in high-efficiency technology,however,complete combustion of fuels created difficult circumstances for oxide-film formation,and consequently adhesive wear proceeds.In order to improve adhesive wear properties,increased amount of hard particles is usually added to the matrix,but excess amount of hard particles is not possible because of compact ability and machinability.In the present experimental study,improved anti-adhesive wear properties were obtained by dispersing fine hard particles in the matrix together with conventional hard particles.Furthermore,hard particles with austenite diffusion phase were developed,and the surface roughness after machining was improved.Cost reduction was also realized,and this valve seat has been installed in the high-load engines of Toyota Motor Corporation.
Valve seat Adhesive wear resistance Oxides formation Hard particles Fine hard particles
Yoshida Yusaku Yoneda Takanori Ueda Yoshihisa Kamo Yuki Ando Kimihiko Okada Hidetoshi
Fine Sinter Co.,Ltd.1189-11,Nishinohora,Akechi-cho,Kasugai,Aichi,480-0303,Japan Toyota Motor Corporation 1,Toyota-cho,Toyota,Aichi,471-8572,Japan
国际会议
北京
英文
431-435
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）