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Title: Influence of Inclusions on the Fatigue Strength of Shot Peened Carburized Steel
Author: Toyoda, Kanazawa, Hisamatsu, Ishiguro
Source: Conf Proc: ICSP-5, (p.333-340)
Publication year 1993
Document number: 1993084
Number of pages: 7
Abstract:
Shot peening method is widely applied to gas carburized gears for automobile to improve the fatigue strength. When the strength is improved by shot peening, the fractue
origins tend to shift from the surface toward the inside. In the case of inside fracture, cracks often originate from non-metallic inclusions existing in the steels. The
purpose here is to investigate the influence of inclusions on the fatigue strength of shot peened carburized steels. The fatigue strength values were obtained by rotating
bending fatigue tests using two kinds of steels which have different oxygen contents. When high arc-height shot peening was treated, the low oxygen contents steel, which
contained less inclusions, exhibited higher strength than that of conventional steel.
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