How To Weld Cast Iron Motor Block. 4 Allow the cast iron block to cool slowly once the repair is complete. Sort of an art.
After the last weld pass Dee heats the entire casting to a uniform 250-280 degrees Fahrenheit before covering the block with a heat blanket and allowing it to cool slowly and uniformly. Sort of an art. View more Cast Iron Welding How-To articles.
The broken cast iron pieces were TIG welded using a 2 Thoriated Tungsten and Argon Gas.
After the last weld pass Dee heats the entire casting to a uniform 250-280 degrees Fahrenheit before covering the block with a heat blanket and allowing it to cool slowly and uniformly. The different typse of alloys expanding and contracting at different rates are what cause the cracking. How to weld cast iron with a MIG welder To maintain a nice weld use the MIG welder to maintain the lowest feed rate and the lowest current. The selection of proper filler metal is the foundation of the cast iron welding.