Ovako from this year's partner country, Sweden, is part of the Japanese Nippon Steel & Sumitomo Metal Corporation and is a manufacturer of high-purity engineering steels and other products for the roller bearing and gearing industry. Working in close collaboration with Ovako, GWJ Technology GmbH has now implemented two high-purity steels - 159X and 159Q. The company, which is also an exhibitor at HANNOVER MESSE 2019, specializes in creating standardized calculation software for mechanical engineering and bespoke calculation and configuration tools with CAD data for optimizing technical sales processes.
The special steels now implemented at GWJ are based on the case-hardening steel 18CrNiMo7-6 and, as a result of significantly reduced impurities, feature modified Wöhler curves. This means that, in static terms, both steels are comparable to 18CrNiMo7-6. However, when it comes to fatigue strength, 159Q offers a flank load capacity that is approximately 30 percent more efficient, and a tooth root load capacity that is 60 percent more efficient. These values are based on investigations carried out by Ovako in the machine tool laboratory of RWTH Aachen University and the Gear Research Centre (FZG) in Munich. The performance improvements achieved in 159X steel are somewhat more modest, making it particularly suitable for essential improvements to existing structures.