Solar Atmospheres of Western PA successfully vacuum heat treated two massive H13 extrusion dies at their Hermitage PA facility. Their newest high performing Solar Manufacturing 10-Bar 600 Horsepower high pressure gas quench vacuum furnace was able to fully harden two huge H13 extrusion dies in successive cycles.
This paper presents how low pressure carburizing and high pressure gas quenching processes are successfully applied on internal ring gears for a six-speed automatic transmission. The specific challenge in the heat treat process was to reduce distortion in such a way that subsequent machining operations are entirely eliminated.
High demands for cost-effectiveness and improved product quality can be achieved via a new low pressure
carburizing process with high pressure gas quenching. Up to 50% of the heat treatment time can be saved. Furthermore, the distortion of the gear parts could be reduced because of gas quenching, and grinding costs could be saved. This article gives an overview of the principles of the process technology and the required furnace technology. Also, some examples of practical applications
are presented.
