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Material Concept:
Optimal use of a die steel is closely linked to understanding its stress
profile (see Figure).
The right die steel for forging-die and press-die
units and secondary tools is selected bearing in mind economic and qualitative aspects. One major factor is the die's service life or estimated tool life quantity. The
tool life quantity is generally limited by wear, or by cracking in the case of complicated impressions Die wear is significantly reduced as the alloy content of carbide
formers such as vanadium, molybdenum, tungsten and chromium
is increased, as shown in Figure 2 . One qualitative measure of this
is the alloy coefficient (AC) used to rate steel. Higher-grade steels
produce favourable results when an optimum relationship between
tool life quantity and tool costs is achieved. The tool life quantity can be further optimized by increasing hardness,balanced with the necessary toughness characteristics. Key
here is uniform quenching and tempering of the dies throughout
their cross-section.
Heat resistance and hardness retention are key material indicators
for die steels. Loss of hardness and even transformation of the
microstructure at the impression surface is the most frequent cause
of wear, deformation and cracking.
We offer the following high grade Die steels of Buderus for the Die forging Industry:
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