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Title: Einfluss Des Kugelstrahlens Auf Die Schwing.von Fedest.bei Untersch.randent.und Versch.reinheits.
Author: Kloos, K.H. and Kaiser, B.
Source: Conf Proc: ICSP-1, (p.359-366)
Publication year 1981
Document number: 1981024
Number of pages: 8
Abstract:
The fatigue life properties of components are decidedly influenced by the condition of the surface zone. Shot peening has been used for a long time as a very effective and
economical surface method for increasing the dynamic strength of high-output springs, in which advantageous stress systems are produced in the surface zone and the
disadvantageous effect of small surface defects are lessened or can be eliminated. Except for microgeometric surface defects, larger nonmetallic surface area inclusions and
structure changes (as a result of surface decarburization and oxidation) can negatively affect the dynamic strength properties, especially of high-strength springs and
spring steels. The results presented from approx 800 cyclic stress tests and numerous accompanying tests on spring steel 55Cr3 (Material No. 1.7176) show that, by shot
peening, the dynamic strength of material with larger nonmetallic inclusions or decarburized surface zones can be considerably improved.
Descriptors: Spring steels-- Mechanical properties; Shot peening; Decarburizing; Fatigue life; Surface defects
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