Microstructure and Dimensional Stability in Si-Mo Ductile Irons for Elevated Temperature Applications Wescast Industries Incorporated

Format:

Conference/Event

Author/Creator:

Black, Brent, author.

Conference Name:

International Body Engineering Conference & Exhibition and Automotive & Transportation Technology Congress (2002-07-09 : Paris, France)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

The demands for high temperature metallic applications requires increased thermal (id est, microstructural and dimensional) stability due to ever tightening tolerances, restrictive designs and higher Internal Combustion Engine (ICE) operating temperatures. Furthermore, these demands have caused the industry to place restrictive microstructure specifications on ductile iron production to ensure dimensional stability for certain applications. The presence of a distribution of precipitate phase was identified in Si-Mo iron as that with the Fe2MoC-type structure, or less predominantly with a two-phase Fe2MoC/M6C-type structure, which is often mistaken for pearlite. This structure may provide Si-Mo irons with an inherent microstructure advantage with respect to dimensional stability at elevated temperatures, relative to alternative ductile iron materials containing a pearlitic microstructure. This paper describes the results of the microstructural characterization of a Si-Mo ductile iron and its influence on the thermal stability of this material. Complete microstructure analysis, semi-quantitative chemical analysis and dilatometer results have shown the absence of pearlite and the existence of a more thermally stable moly-rich precipitate distribution

Notes:

Vendor supplied data

Publisher Number:

2002-01-2115

Access Restriction:

Restricted for use by site license