Our success in welding Ti-6Al-4V was noticed by Defense Research and Development Organization(DRDL) in Hyderabad. They had a need for spherical titanium gas bottles for their missile applications. DRDL was importing these bottles from France. The hemispheres were forged in France and after machining the two hemispheres were welded by Electron Beam welding. When DRDL approached R&D of BHPV, we told DRDL that we don't have forging facilities and we have no plans to install an Electron Beam Welding machine but we may able to hot press Ti-6Al-4V hemispheres. machine it to the required contour and weld the hemispheres by conventional TIG welding. We also guaranteed that we will meet their specifications regarding hydraulic test,increase in volume during hydraulic test and burst pressure. DRDL reposed confidence in us and gave us a trial order.
If I look back I wonder the self confidence we had to tackle such a complex problem. We had to develop whole lot of technologies from scratch. We had to develop tools for hot pressing, machining the hemispheres on a lathe to close tolerances and weld the hemispheres. Possibly because our team members were young and full of enthusiasm and self confidence. We will tell you later how we went about the development.
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