'intermetallic titanim based alloys of the type tizainb with high elastic limit and high creep strength'

摘要

"A process for preparing an in termetallic material from the alloy". This invention relates to a process for preparing an intermetallic material from the alloy of claim 1 characterized in the following steps melting permitting to obtain an ingot of homogeneous composition; deformation at high speed bringing about a reduction of the grain size; rolling at a deformation speed of the order of 10-ls-1; Heat treatment comprising of the following sub-stages, solutionising at a temperature in the range ofT ~ -350C and T ~ + 1soc, for a duration lesser than of 2 hours, ageing at a temperature range between 7500C and 9500C for a duration of more than 16 hours permitting development of orthorhombic hardening phase 0, treatment carried out within a temperature range of 1 oooc around the operating temperature determined for the material, the cooling rates between the heat treatment stages being determinded in accordance with the requirement of the alloy for a particular application, by considering their effect on the size of the laths of the orthorhombic hardening phase