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Computer Modeling [.pdf format]

Ensuring the quality of inductively heated billets

Authors: Gary Doyon, Doug Brown, Valery Rudnev, Chester Van Tyne
Publication: Forge magazine
Date: 4/1/2010

There are many parameters to be considered in designing an induction billet/bar heating system to meet the needs of modern forge shops. Application experience and computer modeling capability are important tools in developing effective induction heating system and avoiding unpleasant surprises related to common incorrect assumptions. Some of those incorrect assumptions that affect the quality of heated billets and bars are discussed in this article.

Two questions are answered (Q & A): What could be done to prevent rust staining (corrosion) and what causes soft spots when scan hardening shafts and how can soft spots can be eliminated?

Authors: Valery Rudnev
Publication: Heat Treating Progress, Professor Induction Series
Date: 9/1/2009

This article features the answers to two questions from readers about what can be done to prevent rust staining from the quenchant, and what causes soft spots and how can they be eliminated. Article also discusses a computer modeling of induction scan hardening of shafts.

Unleashing a superior induction-heating design with computer modeling.

Authors: Valery Rudnev, Don Loveless, Carmo Ribeiro, James Boomis
Publication: Industrial Heating
Date: 8/1/2009

Numerical computer modeling is one of the major factors in successful design of induction heating systems. In the fast-pace global economy, the ability of induction heating manufacturers to minimize the development time and shorten the "learning curve" through efficient computer modeling is critical for a company's success. In an attempt to further excel piston's manufacturing technology, Federal-Mogul specialists have combined their efforts with experts from Spinduction Weld Inc. which recently developed a novel welding process - Spinduction™ and with Inductoheat, Inc. - indisputable leader in designing and computer modeling of novel induction heating systems.

Superior induction heating technologies for modern forge shops. (in Japanese)

Author: Doug Brown, Valery Rudnev, James Lin, Tomoko Nakagawa
Publication: Proceedings of Japanese Forging Association conference (JFA)
Date: 7/1/2009

Today's forge shop must quickly adjust to a rapidly changing business environment while satisfying continuously increasing demand for greater quality of forged parts and environmental friendliness of process equipment. Steel billets (including plain carbon, microalloyied and alloy steels), by far, represent the majority of hot-formed billets, although other materials including titanium, aluminum, copper, brass, bronze, and nickel are also induction heated for hot forming. Recent developments, common misassumptions, and innovative solutions in induction billet heating prior to hot forming are discussed here.

Spray quenching in induction hardening applications

Author: Valery Rudnev
Publication: Journal of ASTM International, Vol.6, No.2
Date: 2/1/2009

Available online at www.astm.org.

Systematic analysis of induction coil failures. Part 14: Split-return inductors and butterfly inductors

Author: Valery Rudnev
Publication: Heat Treating Progress, Professor Induction Series
Date: 3/1/2009

The main considerations when choosing an inductor style are the shape of the part, the desired heat-treat pattern, and the material handling to be used for production (i.e., how the part is moved into the coil or the coil indexes into the part, whether rotation of the part is required, or how is the part transferred after heat treatment). Over the years, induction practitioners have established a family of special or specialty inductors. Common names have been coined to describe their appearance or function, such as pancake, channel, hairpin, split-return, and butterfly inductors [1]. This column is devoted to the analysis and prevention of failures of split-return and butterfly-type inductors.

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