Integral Preoxidation of Aerospace Gear Steels

A study of the use of integral preoxidation was conducted on aerospace gear steels.  Some aerospace gears steels make use of a preoxidation process that is separate from carburizing, which adds cost due to additional manufacturing steps, processing time, handling of parts, etc.  Integral preoxidation may be a simpler surface activation method to facilitate uniform carburizing.  Results of a test program are presented