Development of Heat Resistant Titanium Alloy for Exhaust Valves Applicable for Motorcycles 2016-32-0023
Amidst of the recent concerns on depletion of natural resources, a new heat resistant titanium alloy has been developed using the minimum amount of rare metals. Using Ti-811 as a basis and modifying the alloy composition to Ti-7Al-2Mo-0.2Si-0.15C-0.2Nb, the mechanical property, the creep resistance and the oxidation resistance at high temperatures are improved. At the same time, with the β transformation point shifted to a higher temperature, the hot formability is also improved. The newly developed alloy has made it possible to expand the application of titanium material to exhaust valves in reciprocating engines.
Shinji Kasatori, Yuji Marui, Hideto Oyama, Kosuke Ono
Honda R&D Co., Ltd., Kobe Steel, Ltd.
SAE/JSAE 2016 Small Engine Technology Conference & Exhibition
SAE International Journal of Materials and Manufacturing-V126-5EJ, SAE International Journal of Materials and Manufacturing-V125-5, SAE International Journal of Materials and Manufacturing-V126-5