技術資料
焼結チタンバルブの開発
2001 年 72 巻 2 号 p. 111-117
詳細
2001 年 72 巻 2 号 p. 111-117
In October 1998, a new mass-produced car with titanium engine-valves was released from TOYOTA Motor Corporation. Both intake and exhaust valves were manufactured via a newly developed cost-effective P/M forging process. Furthermore, the material which was specially designed for the exhaust one is a unique TiB reinforced titanium metal matrix composite (MMC). This paper discusses the materials and manufacturing methods used. The tensile, fatigue strength and creep resistance of the developed MMC are always superior to those of the typical heat-resistant steel of 21-4N.
