Abstract
1. The fatigue and static strengths of steel 12KhN3A after carburizing and tempering in fluidized bed are the same as those resulting from the existing treatment, while the wear resistance is higher. 2. Rapid heat treatment of gears in fluidized bed (carburizing to a depth of 1.2–1.3 mm at 950° for 2.5 h; high-temperature tempering at 650° for 3 h; quenching from 820°, with holding for 20 min; lowtemperature tempering at 170° for 2 h) is recommended for production tests. 3. As compared with the existing technique, treatment in fluidized bed shortens the carburizing time and reduces the quenching time by a factor of four and tempering time by a factor of three.
Published Version
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