What should be done to the flow maximum prior to welding for best results?

The optimal strategy for thermite welding involves ensuring that the flow maximum—typically referring to the excess material or the height of the weld area—is properly managed for the best results. Reducing the flow maximum by grinding helps in achieving a more uniform and controlled weld bead. This practice minimizes the risk of excessive material leading to defects such as incomplete fusion or weak areas in the joint.

When the flow maximum is too high or improperly shaped, it can interfere with the effective melting and interaction of the base materials. By grinding it down, the welder creates a more conducive environment for the molten thermite to adequately fill the joint, ensuring stronger adhesion and overall integrity of the weld.

Maintaining an appropriate flow maximum is crucial for optimizing heat distribution during the welding process and ensuring that the materials are fused together properly without creating unwanted deformations or structural weaknesses. So, reducing it by grinding before the welding process is vital for achieving high-quality thermite welds.