The major purpose of preheating and postheating of cast iron is to control the rate of temperature change.

Question

Quizplus · Accepted Answer

Preheating and postheating of cast iron helps to control the rate of temperature change, which is necessary to prevent thermal shock and to achieve uniform heating and cooling. It also improves the metallurgical properties and reduces the risk of cracking or distortion during the casting or welding process.

The Major Purpose of Preheating and Postheating of Cast Iron