May 9, 2018 – New Delhi – CHW Forge, India’s leading seamless rolled ring hollow forgings manufacturer stays ahead of competition by taking a keen interest in the research and development. A research paper published by four metallurgy experts- A P Karamyshev, I I Nekrasov, A I Pugin, and A A Fedulov- from the Ural Federal University in Russia stated a mathematical modelling to define the stress-strain state, force and velocity parameters of the process, formation of the billet and temperature conditions at which the deformation of the stock occurs.
Due to this research, CHW Forge’s engineers stand to gain an in-depth understanding of the business and better produce a high-quality stock that can be used by other manufacturing industries, namely, defence, aviation and aerospace, power generation, automobiles, ship building, etc.
The study of this radial forging process of a hollow billet is summarized as under:
This research involved the generation of a mathematical model of the multistage hot forging of the hollow billet on the two-die machine with a vertical placement of levers that was coupled with a mandrel.
The purpose of this study was to create such a model that would eventually aid in defining rational parameters of the deformation on a particular machine. Moreover, this would help to select the necessary heating mode that will lay foundations of design of dies calibration.
This research was then broken down into two main parts. The first part included finding a viable solution to the problem of the billet heat treatment. The second part consisted of the study of the forging process, which included formation of the forging dies model with its assigned movement. Also, two sub-parts include modelling of the billet feeding process with its varying velocity modes during the forging process; and the assessment of temperature fields.

First part of the model is summarized here:
To achieve optimum results, certain boundary conditions were set on chosen surfaces of the billet. Assumptions were made that heating and heat exchange occurs on the outer and inner surfaces of the billet and heating is extended up to a certain distance from the front-end of the billet.
The heat treatment corresponded to the entire volume required to fill the space between dies including the mandrel. The temperature was increased up to 1250 degree Celsius for 50 seconds to obtain uniform heating. Upon exiting the inductor and on its way to the axis of the forging machine, billet begins to cool down. And this marks the solution to the problem of billet cooling.

About CHW Forge:
The hollow forgings manufacturing and supplying company has been in existence for over 60 years. It enjoys international and domestic reputation as being the most trustworthy metallurgical components manufacturer.