Carbonitriding studies with a high amount of nitrogen are characterized by adding ammonia to the process gas at a higher rate than the usual 3-5%. This work focuses on the impact of nitrogen on the lifetime of carburized parts (e.g. gears, sprockets, bearings, crankshafts) exposed to Hertzian pressure or fatigue.

When you start a new project that involves metals, it’s important to know which materials you are going to use to get the outcome you want. When it comes to heat-treating outcomes, understanding the specific material is even more important.

Powder metallurgy is a continually evolving technology utilizing advanced compaction techniques and new alloy systems to optimize mechanical performance of the resulting powder-metallurgy (PM) part.

Unlike the Wright Brothers, Hugh Rockwell and Stanley Rockwell were two engineers working for the same company who shared nothing more than a common last name and an interest in developing a better type of hardness test, specifically to test the hardness of bearing races.

This article presents the vacuum-carburizing technology of Pyrowear® Alloy 53 steel. It discusses the methods of establishing different carbon concentration profiles in a layer and their influence on the hardness profile.

Over the years, instances of carbon pickup resulting in subtle hardness variations in 0.30% and 0.40% carbon steels after neutral hardening in an endothermic gas atmosphere have been reported and often result in rework or scrapped loads.