Tech Talk
What is "Spheroidizing"?
Heating and cooling to produce a spheroidal or globular form of carbide in steel. Spheroidizing metods frequently used are: 1. Prolonged holding at a temperature just below Ae1. 2. Heating and cooling alternately between temperatures that are just above and just below A21. 3. Heating to a temperature above Ae1 or Ae3, and then cooling very slowly in the furnace or holding at a temperature just below Ae1. 4. Cooling at a suitable rate from the minimum temperature at which all carbide is dissolved, to prevent the re-formation of a carbide network, and then reheating in accordance with method 1 or 2 above; applicable to hypereutectoid steel containing a carbide network.
