Investigation on the hot-deformation behaviour of sintered and forged specimens to improve the forging safety of powder-forged products

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.

Automated summary

The hot-deformation behavior of sintered and forged alloys was compared to improve the forging safety of powder-forged products in this study. It was found that the forged specimen was more prone to cracking during the forming process. Finite-element simulation revealed the co-existence of fully dense and not fully dense regions during forming. Therefore, determining forging parameters based on the processing map of the forged specimen would enhance the forging safety of powder-forged products. A spur gear was successfully manufactured as a model product based on the simulated results.