Railroad car friction casting metallurgy

摘要

A process for the manufacture of railroad car truck components with high wear resistant qualities involves an alloy of specific composition, dumping from the sand mold above a specific temperature and being allowed to cool in air, resulting in an "as cast" acicular microstructure having very little amounts of Pearlite and carbides. This process eliminates the heat treating, quenching and draw operations normally associated with the production of wear resistant, acicular castings.