In the September 2007 issue of the Die Casting
Engineer magazine, the first of a two part article will be published on
"Understanding Residual Stress Effects and Corrective Action For Die Casting
Tools".
Much has been written about the benefits of
heat stress tempering, however, proper shot peening technique remains a mystery
or unknown proven quantity for many die casters. This is the first of a two part
series that attempts to explain some of the facts surrounding this type of
mechanically induced compressive stress, along with the controls that are used
to assure obtaining the maximum benefits from our proprietary
MetaLL*ifẻ
process.
In part 1, we discuss general peening’s
History, Definition, Stress Curves, Depth, and the manufacturing effects that
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the life and performance on a far too
significant number of die casting dies.
Part 2 in January 2008 will continue the
discussion regarding the
MetaLL*ifẻ
process, its numerous benefits, special controls that maximize these benefits, new technologies in the field, and some case studies
that validate and confirm the benefits.
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Have you ever wondered what part cavitation
effect has on breakout and erosion? We answer this question which may
surprise many die casters who equate breakout to heat checking when they are
actually two different modes of failure.
Want to find out more?
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