: to subject (an iron-base alloy) to prolonged heating near the critical temperature and then to slow cooling so that the iron carbide assumes a globular form — compare anneal, heat-treat.

What is Spheroidize annealing?

Spheroidize Annealing is a type of annealing process involving controlled heating and cooling to produce a microstructure consisting of spherical (spheroidal) carbides in a ferrite matrix.*

How do you Spheroidize steel?

Spheroidizing is performed by annealing steels with more than 0.8% carbon. The metal is heated to a temperature of about 1200°F (650°C) and maintained at this temperature for a predetermined amount of time to convert its microstructure.