| Description: Ferrium® C61™ is a member of a new class of martensitic secondary-hardening gear and bearing steels that utilize an efficient M2C precipitate strengthening dispersion. Because of the efficiency of this strengthening dispersion, a superior combination of properties can be attained for a given application. Ferrium® C61™ was designed to provide carburized surface properties similar to conventional gear steels such as AISI 9310 and EN36C with the added benefit of an ultra high-strength core along with excellent fracture toughness. C61™ should be considered for use in applications that require high case hardness, high strength, high toughness, and thermal resistance. C61™ has very high hardenability and only requires mild quenching. Typical Applications: Power transmission shaft, gears and other demanding applications in aerospace, energy, and racing/off-road/mission-critical vehicles and other industries where weight savings, compactness, high temperature resistance and high surface fatigue resistance are valued. The high core strength and high hardenability of Ferrium® C61™ particularly benefits structural components such as shafts with integral gearing. Workability:
Fording: Forge at 1800-2100°F (982-1149°C) Heat Treatment:
Normalizing: Heat uniformly to 1875°F(1024°C) and air cool..
Annealing: Heat uniformly to 1250°F(677°C), hold for 2 to 8 hours and air cool.. Hardness should be less than 327 HBW.
Carburizing and Hardening: Vacuum carburize at 1830°F (1000°C), followed by quenching in gas (1.5 Bar Nitrogen or higher) or oil medium.
Refrigerate: To obtain optimum case hardness, a refrigeration treatment at -100°F (-73°C) or lower for 1 hour is recommended. This should be performed with minimal delay after completion of the quench.
Temper: At 900°F (482°C) Product Forms: Ferrium® C61™ is manufactured in typical ingot, bar and billet forms. Ferrium is designed by Questek Innovations, LLC. and is manufactured by Latrobe Specialty Steel under license. |
