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New steel for gears with up to 60% more strength
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GWJ Technology integrated as the world's first manufacturer of professional calculation software for gear transmissionhigh-purity steels from Ovako from Sweden. In close cooperation, the two high-purity steels 159X and 159Q were implemented in the gear modules for spur gears. They are based on case hardening steel 18CrNiMo7-6.
Due to significantly lower impurities, these steels have modified Wöhler curves. This makes them comparable to the 18CrNiMo7-6 in the static area. In the fatigue range, however, 159Q offers approximately 30% higher flanking capacity and 60% higher tooth base strength. These higher fatigue strength values are based on Ovako internal investigations and have been verified by investigations at the WZL in Aachen and at the FZG in Munich.
The 159X steel has a slightly lower performance compared to the 18CrNiMo7-6 and is therefore well suited for the necessary improvement of already existing designs. The potential of the 159Q can be used especially with new interpretations. It may be advantageous to place the focus on an optimized Fresragagfähigkeit. As a result, better toothing efficiencies and thus lower power losses usually result. From the point of view of GWJ Technology, these Ovako steels open up completely new possibilities for transmissions and have a high potential for further increasing the power of gear drives and gear components.
The two steels 159X and 159Q are available in all three GWJ software solutions for gear calculation, ie in the web solution "Eassistant", in the desktop application TBK and in the special software "Gear Engineer" for 5 gear cutting.