Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지

The Shape Design of Shot Ball to Improve the Reliability of Surface Treatment

표면가공의 신뢰성향상을 위한 쇼트볼의 형상설계

  • 이승호 (경기공업대학 정밀계측과)
  • Published : 2002.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, to improve the effect of the surface treatment, the shape design of shot ball is proposed. The fatigue effects of shot peening by the cut wire shot ball and the rounded cut wire shot ball are compared. The rotary bending and tensile fatigue tests are conducted on a spring steel to evaluate fatigue lives. The residual compressive stresses by the rounded cut wire shot ball is higher than by the rounded cut wire shot ball. This consequently increase the fatigue life and the reliability of surface treatment. Thus, to obtain optimum, repeatable and reliable shot peening effect the shape of the shot ball must be round.

Keywords

References

  1. H. Aoki, E. Nagashima and T.Miura : 'Effect of Shot Peening Conditions on Fatigue Strength of Carbuhzed Steel', Proc. of the 4th International Conference on Shot Peening, Tokyo, (1990) 513
  2. C. M. Verpoort and C. Gerdes : 'Influence of Shot Peening on Material Properties of Turbine Blades', Shot Peening Theory and Application, Institute for Industrial Technology Transfer International, France, (1989)11
  3. R. D. Gillespie : 'An Investigation of the Dura-bility and Breakdown Characteristics of Shot Peening Media", Proc. of the 4th International Conference on Shot Peening, Tokyo, 1 (1990) 27
  4. B, Gillespie D. B. Fowler : "Evaluation of Size and Shape of Shot Peening Media by Image Analysis' SAE Technical Paper Number 910926(1991)
  5. R. D. Gillespie : 'Its Effect on Process Consis-tency and Resultant Improvement in Fatigue Characteristics', Proc. of the 5th International Conference on Shot Peening, Oxford, 1 (1993) 81
  6. R. Simpson and G. Chiasson : 'Quanatification of the Effects of Various Levels of Several Critical Shot Peen Process Variables on Workpiece Surface Integrity and the Resultant Effect on Workpiece Fatigue Life', WPAFB AFWAL-TR-89-3029(1989)
  7. Y. Watanabe N. Hasegawa K. Namiki and A. Hatano : 'The Influence of Brocken Shots on Peening Effect of Hard Shot Peening', Proc. of the 4th International Conference on Shot Peening, Tokyo, 1 (1990)63
  8. Ebenau, A. D. Lohe, O. Vohrmger, E. Macherauch : 'Influence Shot Peening on the Micro-structure and the Bending Fatigue Strength of Bainitic-austenitic Nodular Cast Iron", Proc. of the 4th International Conference on Shot Peening, Tokyo, 1 (1990)389