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Induction Hardening Applications [.pdf format]

Induction Contour Hardening of Bevel, Hypoid and Pinion Gears

Author: S.Brayman, A.Kuznetsov, S.Nikitin, B.Binoniemi, Valery Rudnev
Publication: Gear Solutions
Date: 9/1/2011

Article discusses unique technology that allows the replacement of carburizing with induction contour hardening for a wide range of complex-shaped components, including parts previously thought to be impossible to induction harden. This includes but not limited to spiral bevel pinions, spiral bevel ring gears, journal and differential crosses, helical bull gears, shaft helical shafts, etc.

Computer Modeling Helps Prevent Failures of Heat Treated Components

Author: Valery Rudnev
Publication: Advance Materials and Processes
Date: 10/1/2011

Consider this scenario. Following the development stage, an induction hardening machine is built, completes a successful run-out, and is shipped to the customer. After a number of successful production runs, parts begin to experience cracking during the hardening operation. A check of induction machine process parameters (power, frequency, quenchant temperature, concentration, pressure and flow, part positioning inside induction coil, etc.) shows everything is in order. The question is why does cracking in parts suddenly occur? An article discusses some of subtleties related to this issue.

Computer Modeling Helps Identify Induction Heating Misassumptions and Unknowns

Author: Valery Rudnev
Publication: Industrial Heating
Date: 10/1/2011

Whenever someone is discussing about induction heating, reference is often made to the skin effect phenomenon that is a fundamental property of induction heating. Unfortunately, many people do not aware that the widely used assumption regarding current and power distribution due to a skin effect is not valid for great majority of induction surface hardening applications. Computer modeling helps to unveil this common misassumption.

Induction heating helps put wind turbines in high gear.

Authors: Gary Doyon, Doug Brown, Valery Rudnev, Frank Andrea, Chirag Sitwala, Edison Almeida
Publication: Heat Treating Progress
Date: 10/1/2009

Accurately controlled induction heat treating systems are effectively used for induction hardening large gears and bearing races utilized in wind energy applications producing the required metallurgical properties with minimum shape distortion, providing high quality parts that directly affect the longevity of wind turbines.

Single-coil dual-frequency induction hardening of gears.

Authors: Valery Rudnev
Publication: Heat Treating Progress, Professor Induction Series
Date: 10/1/2009

Some induction heating practitioners have heard about simultaneous dual frequency gear hardening, which uses two single-frequency inverters working on the same coil at the same time. Articles discusses the next step in this technology. Circuitry and review of main process parameters of Inductoheat's induction gear hardening machine that comprises medium and high-frequency capabilities are provided here as well.

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.

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