A Study on Contact Fatigue Performance of Nitrided and TiN Coated Gears
The developing trend of gears focusing on high-speed, heavy-duty, lightweight, and small sizes makes hardness promotion of gear face through […]
A New Standard Under Development: Specifying Powder Metallurgy Gears
In the early nineties, I was working at a transmission manufacturing facility in Indiana that made lawn and garden transmissions. […]
Enhancing Control of Distortion Through One-Piece-Flow Heat Treatment
Proper distortion control has become even more important than in previous days. Distorted gear components cause noise in the transmission […]
Casting, Forming, and Forging
There are many methods for manufacturing gears, including: Metal removal processes (hobbing, shaping, milling, shaving, grinding, honing, and lapping) Various […]
Crack Testing and Heat Treat Verification of Gears Using Eddy Current Technology
While eddy current technology was initially developed for testing of bar, tube, and wire, advances in electronics, automation, and coil […]
Electric Furnaces Complement Heat Treat Requirements for Gears
Furnaces heated by electric elements routinely harden, anneal and stress relieve gears. Today’s heating elements operate at higher temperatures, last […]
Induction Heating: A Guide to the Process and Its Benefits
Induction hardening is being increasingly used within the gear industry. However, before looking at the advantages of the method, it […]
Cryogenics Comes of Age
Manufacturing innovations that impart better performance, cost savings, and longer component life are typically expensive, require new equipment, and new […]
Processing New Gear Steels
Carburized steel gears are widely used for power transmission in rotorcraft, transportation vehicles, agricultural and off-road equipment, industrial rotating equipment, […]
Cryogenic Treatment of Gear Steel
Case carburized steel (En 353) is the material commonly used for making crown wheels and pinions. The reasons for the […]
Contour Hardening Bevel, Hypoid, and Pinion Gears
Traditional gear heat treatment involves gas carburizing in batch or continuous furnaces for an extended time, and then oil quenching. […]
Integrated Heat Treating
For decades the gear industry has faced the challenge of producing high performance components in a cost-effective manner. To meet […]
Refurbishing Wind Turbine Gears
Multi-megawatt wind turbine gearboxes operate under demanding environmental conditions including considerable variation in temperature, wind speed, and air quality. It […]
Heat Treat Processes for Gears
Heat treatment is a critical and complex element in the manufacturing of gears that greatly impacts how each will perform […]
Gas Carburizing vs. Contour Induction Hardening in Bevel Gears
This paper examines the impact on distortion of two processes using traditional gear measurement techniques. It will discuss design considerations […]
Cryogenic Treatment of Gears
Most companies are looking for a secret that can help them keep a step ahead of the competition… a little […]
Gear Hardening Goes Green
In his annual message to Congress in December of 1862, President Abraham Lincoln concluded with the words “We can succeed […]
Dimensional Stability in Cryogenic Treatments
When cryogenically treated, case carburized steel (En 353) showed tremendous improvement in wear resistance [1]. This is due to the […]
Low Pressure Carburizing for Transmissions
With the many advances that have taken place to improve quality in the gear industry, it is only logical that […]
Retained Austenite Stabilization
The phenomenon of retained austenite stabilization in tool steels is well documented [1,2]. When a steel with a martensite finish […]
