TITANIUM SLAB FOR HOT ROLLING PRODUCED BY ELECTRON-BEAM MELTING FURNACE, PROCESS FOR PRODUCTION THEREOF, AND PROCESS FOR ROLLING TITANIUM SLAB FOR HOT ROLLING

摘要

Provided is a titanium slab that has little irregularity in size and cracks at corners and can therefore be hot-rolled after melting by an electron beam melting without additional breakdown rolling processes or other corrective processes. A method for producing the slab is also proposed. The titanium slab that is molded directly from an electron beam furnace has a warp of less than 5mm in the direction of thickness of the slab and less than 2.5mm in the lateral direction per 1000mm length of the slab. In a method of melting the titanium slab to be hot-rolled, molten metal is poured into a mold having a rectangular shape that is placed inside an electron beam furnace from a gate provided on the shorter side wall of the rectangle. Every corner of the rectangular mold is rounded.