LOTHERME –HF30 wire
PROBLEM DUE TO
1. The surface shall be machined ,cleaned & be made free from cracks prior to weld deposition.
2. The wheel shall be preheated at 250-350 deg c prior to welding and similar inter-pass temperature shall be maintained during welding.
3.Post-weld stress relief heat treatment shall be done at 350-450deg c for 5 to 8 hrs depending on the job.