Abstract
To improve the forging safety of powder-forged products, the hot-deformation behaviour of sintered and forged alloys was investigated and compared in the present study. The results show that the forged specimen was at a higher risk of cracking than the sintered specimen during the forming process. Furthermore, the finite-element simulation also clearly revealed that both fully dense and not fully dense regions co-existed during the forming process. Therefore, using the processing map of the forged specimen to determine the forging parameters would improve the forging safety of powder-forged products. Finally, a spur gear was manufactured as a model product based on the simulated results.
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