This article introduces a practical technique pioneered by a metallurgist at the Indian Institute of Technology. The technique enables any kind of steel to be heated without the problems associated with oxidation and decarburization.
The rolling and thermal treatment of forged
rings sometimes leaves residual stresses that cause dimensional distortion.
Corrective measures in industry are often based on trial-and-error techniques.
Ongoing research seeks to base corrective actions on the laws of physics.
Robotic die spray systems offer forge shops the most options and flexibility to solve die spray issues. Additionally, there exists a variety of spray tip and nozzle designs that, when properly integrated, can help maintain quality and consistency from one forging cycle to the next.
The controlled cooling of a hot forging has several advantages over the antiquated practice of piling the forgings into a bin until the bin is full, then repeating the same uncontrolled filling of another bin until the forging run is completed. Repeatable cooling for each forging produces a consistent microstructure, hardness and residual-stress state in the parts as well as consistent dimensions at ambient temperature.
Check out the October 2020 issue of FORGE, featuring our cover story on "Fever Screening and Forging Quality". Other features include "Forging with Hybrid Steel", "FutureForge in Scotland: The Goldilocks Effect", and much more.