Research on the Ti-48Al-2Cr-2Nb automobile exhaust valve formed in permanent mold during centrifugal casting process

J Mater Sci Technol ›› 2001, Vol. 17 ›› Issue (S1): 97-100.

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Research on the Ti-48Al-2Cr-2Nb automobile exhaust valve formed in permanent mold during centrifugal casting process

Wenbin SHENG, Dong LI, Rui YANG, Yuyin LIU, Jingjie GUO, Jun JIA

Institute of Metal Research, Chinese of Academy of Sciences, Shenyang 110016, China...

Received:2000-09-18 Revised:2000-12-30 Online:2001-10-28 Published:2009-10-10
Contact: Wenbin SHENG

Abstract

Abstract: Ti-48Al-2Cr-2Nb automobile exhaust valves were formed with permanent mold centrifugal cast method and their surface layer structure, microstructure, elements distribution and mechanical properties were analyzed by SEM, XRD and EMPA etc. Furthermore, the HIPped valves were tested on 483Q diesel engine. Results showed that the element distribution of TiAl based alloy exhaust valves was uniform and their microstructure was refined. The typical mechanical properties of HiPped exhaust valves were sigma (b)=670 MPa, sigma (0.2)=527.5 MPa and delta =3%. Engine test showed that the valves had excellent airtightness and wear resistance properties and satisfied the requirements of engine successfully.

Key words:

Wenbin SHENG, Dong LI, Rui YANG, Yuyin LIU, Jingjie GUO, Jun JIA. Research on the Ti-48Al-2Cr-2Nb automobile exhaust valve formed in permanent mold during centrifugal casting process[J]. J Mater Sci Technol, 2001, 17(S1): 97-100.

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Research on the Ti-48Al-2Cr-2Nb automobile exhaust valve formed in permanent mold during centrifugal casting process

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