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.
In a fast-paced global economy, the ability of
induction heating manufacturers to minimize time between a customer’s request
for a quotation and a prepared quote based on efficient computer modeling is
critical to a company’s success.
Computer modeling is no longer just a useful tool, it has become a necessity. Computer simulation provides the ability to predict how different factors may affect the transitional and final thermal conditions of a heated workpiece and what must be done to determine the most appropriate process recipes.
This facility’s shallow-cavity “captive” forgings are used by its parent company in manufacturing tradesman-quality hand tools. However, management recognizes an opportunity for growth in taking on commercial forging work. Recent ISO 9001:2008 certification is a key component of this company’s growth strategy.
In the past, the proper induction heating of forging billets presented challenges to the forger that could only be resolved through trial and error. Now, by using advanced computer simulations to model the heating and forging processes, hot-forging designers have powerful tools to reduce the guesswork and unit costs.
In-line induction heating has become a popular method of heating billets in forging applications. There are many parameters to be considered in designing an induction heating system to meet the needs of modern forge shops. Application experience and computer modeling are important tools in developing effective induction billet-heating systems and avoiding unpleasant surprises related to common misconceptions.
In the first four articles in this series, the operation and use of four types of forging equipment – hammers, mechanical presses, hydraulic presses and screw presses – were reviewed. In this fifth and final article, a general comparison of these four types of forging equipment is made. Each type of equipment can perform well or poorly depending on conditions and circumstances. It is hoped that the comparisons made in this article will help readers select the right type of equipment for the specific job.