What is the major purpose of pre- and post-heating cast iron for welding?
A) To allow the weld to fuse deeper into the joint
B) To control the rate of temperature change
C) To reduce the carbon content in the casting around the weld, which makes it less brittle
D) It helps the weld metal flow more evenly into the crack

Question

Quizplus · Accepted Answer

Pre- and post-heating cast iron for welding is primarily done to control the rate of temperature change. This process minimizes thermal shock and the development of stresses that could lead to cracking, ensuring a more stable and successful weld.

What Is the Major Purpose of Pre- and Post-Heating Cast