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Title: Effects Of Shot Peening On The Corrosion Fatigue Properties Of Spring Steels
Author: Kaiser, B.
Source: Conf Proc: ICSP-3, (p.667-674)
Publication year 1987
Document number: 1987026
Number of pages: 8
Abstract:
Besides heat treatment and mechanical surface strengthening methods to improve the fatigue limit, corrosion preventing procedures have to be employed for longer durability
of safety components such as vehicle springs.
T
hese springs are corrosion protected by different systems of varnish
coats today. A preceding shot peening process not only results in an improvement of fatigue strength but also in a clean and enlarged metallic surface giving better
adhesive conditions for the varnish coat.
S
hot peening, however, can not fundamentally modify the state of active
corrosion fatigue in which low-alloy, high-strength spring materials are when attacked by tap water or sodium chloride solution without or with a damaged corrosion
protection layer.
A
lthough the basic mechanisms of corrosion fatigue fo steels in active
or passive conditions have been examined in detail already only little information is known about the corrosion fatigue behavior of spring steels.
T
o study the corrosion fatigue properties of three typical spring steels
and to determine optimal corrosion protecting methods, extensive research work is being carried out. This paper deals with some results of corrosion fatigue tests with the
spring steel 50 CrV 4 and the comparison between mechanically polished and shot peened specimens.
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