Surface Treatment Method for a Steel Workpiece Using High Speed Shot Peening
Author: Yoshiro Yamada et. al
Source: US Patent 5,816,088
Doc ID: 2023011
Year of Publication: 1998
Abstract:
Fatigue-resistance is significantly increased by performing
shot peening using fine shots. A plurality of particles of hard
metal having a diameter ranging from 20 to 100 micrometers
are ejected onto a surface of a steel workpiece at an
impinging speed greater than 80 m/second. The impinging
speed is controlled so that the upper limit of temperature
rising of the surface of the workpiece is maintained at a
temperature more than 150° C. but less than the temperature
at which recovery recrystallization and austentizing of steel
occurs.
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