The development of low cost TiAl automotive valves

被引:59
作者
Keller, MM
Jones, PE
Porter, WJ
Eylon, D
机构
[1] Technion, Haifa
[2] Dept. of Grad. Materials Engineering, University of Dayton
[3] University of Dayton, Dayton, OH 45469-0240
来源
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY | 1997年 / 49卷 / 05期
基金
美国国家科学基金会;
关键词
Investment Casting; Exhaust Valve; Gamma Titanium; Shot Sleeve; Automotive Market;
D O I
10.1007/BF02914683
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents the results of a project funded by the Edison Materials Technology Center to develop low-cost titanium aluminide automotive valves. In the course of the project, more than 800 valves were produced using several variations of the permanent-mold casting process. Applying pressure during solidifcation improved the casting fill; however, none of the permanent mold castings methods produced pore-free as-cast valves. The as-cast microstructures of the valves were much finer than investment-cast microstructures of similar section sizes. The room-temperature tensile properties of the permanent mold castings were superior to those of investment castings of a comparable section size.
引用
收藏
页码:42 / 44
页数:3
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