Titanium coil cold rolling requires precise process control to maximize yield while maintaining material integrity. The production sequence begins with hot-rolled coils undergoing welding and lead strip attachment-a critical step where material compatibility determines joining method. Pure titanium lead strips enable conventional butt welding while dissimilar materials necessitate mechanical riveting. Surface preparation involves combined mechanical descaling and mixed-acid pickling to eliminate oxide layers without substrate damage.
Multi-roll mills with smaller diameter work rolls prove optimal for cold rolling due to titanium's pronounced anisotropy. High-tension rolling parameters must be balanced with controlled reduction rates to prevent edge cracking. Vacuum annealing remains non-negotiable for final product quality, eliminating surface contamination risks inherent in conventional atmospheres. Subsequent temper rolling and tension leveling ensure dimensional stability and required surface texture.
Process innovations like continuous coil butt-welding systems and automated lead strip recycling loops significantly reduce material losses. Implementation of EB-melted feedstock combined with closed-loop temperature monitoring during thermomechanical processing further minimizes internal defects. These integrated approaches collectively push yield rates beyond conventional benchmarks while maintaining metallurgical specifications.
