Surface treatment method for a steel workpiece using high speed

Details Surface treatment method for a steel workpiece using high speed Surface treatment method for a steel workpiece using high speed

1997-04-15

1998-10-06

Jones, David

Metal deforming

By shot-blasting

29 907, C21D 706

Patent

active

058160884

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.degree. C. but less than the temperature at which recovery recrystallization and austentizing of steel occurs.

REFERENCES:
patent: 4250726 (1981-02-01), Safian et al.
patent: 5592840 (1997-01-01), Miyasaka

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