C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 10/00 (2006.01)
Patent
CA 2464172
A novel treatment method, for improving fatigue life, is provided that aims to resolve problems associated with conventional treatment methods for improving fatigue life of metal by reduction of stress concentration and conventional treatment methods for improving fatigue life of metal by introduction of compressive stress, that is, problems of poor efficiency in work execution, required level of skill of workers, and the impossibility of quality control due to lack of means for measuring the effect after treatment, characterized in that, for locations in metal for which fatigue is a problem, after pre-treatment is performed, ultrasonic impact treatment is performed, and thereafter, a quality assurance test is performed so as to improve the fatigue life of the metal.
Homma Koji
Ishikawa Tadashi
Kasuya Tadashi
Matsuoka Kazumi
Tominaga Tomonori
Goudreau Gage Dubuc
Nippon Steel Corporation
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