MANUFACTURE OF PURE TITANIUM ROLLED STOCK FOR INDUSTRY

摘要

PURPOSE: To obtain a rolled stock poor in oxidizing scale, excellent surface properties by heating and rolling the rolled stock in a specified range of temperature in the atmosphere composed mainly of inert gas such as argon or nitrogen. ;CONSTITUTION: Ingot material of pure titanium for industry or forged material or bloomed material obtained by working the ingot material is heated at a comparatively low temperature (400-700°C) in a furnace heated by inert gas such as, mainly, argon or nitrogen, etc., and rolled at a material temperature ≤700°C. For example, the ingot is hot-rolled to obtain a slab having a thickness 130mm and it is descaled by machining, then, it is heated at 400-700°C in the atmosphere of argon or nitrogen, etc., and rolled into the final plate thickness 6mm (draft: 95%). In this way, no edge cracking is found and mechanical descaling can be omitted. Consequently, load for surface descaling can be reduced and a rolled stock excellent in surface properties is manufactured.;COPYRIGHT: (C)1994,JPO&Japio