Development of automobile engine mounting parts using hot-cold complex forging technology

Main advantages of cold forging are improvement of mechanical properties, excellent dimensional accuracy, and surface quality. Hot forging is a processing of plastic deformation for the metal at recrystallization temperature or higher. It is possible to decrease the flow stress and energy required to form the material at elevated temperature. Complex forging for combining cold forging and hot forging was applied in this study to ensure the shape accuracy of engine mounting parts. The complex forging technology of engine mounting parts would be very useful to improve dimension accuracy, reduce manufacturing cost, and increase die life.