HEAT TREATMENT OF THE CASTED Ti6Al4V TITANIUM ALLOY TEPELNÉ SPRACOVANIE LIATEJ TITÁNOVEJ ZLIATINY Ti6Al4V Authors: Peter Pinke (1) , Mihály Réger (2) Workplace: (1) Department of Materials Engineering, Faculty of Materials Science and Technology, Slovak University of Technology (2) Department of Materials Science and Technology, Bánki Donát Faculty of Mechanical Engineering, Budapest Polytechnic Address: (1) Bottova 23, 917 24 Trnava, Slovakia (2) Népszínház u. 8, 1081 Budapest, Hungary Tel.: (1) 00421 335 521 119 E-mail: pinke@mtf.stuba.sk Abstract The influence of the solution treatment at 1050 o C, 950 o C and 800 o C with water or air cooling followed by aging treatment at 550 o C was investigated on the specimens from Ti6Al4V model titanium alloy. After the treatments 1050 o C/ water and 950 o C/water α′ martensite structure was created, in the other cases a lamellar structure of α + β phases was formed. Vplyv rozpúšťacieho žíhania pri 1050 o C, 950 o C a 800 o C s ochladzovaním do vody alebo na vzduchu s následným vytvrdzovaním pri 550 o C bol skúmaný na vzorkách z liatej modelovej zliatiny Ti6Al4V. Po spracovaní 1050 o C/ voda a 950 o C/ voda sa vytvorila α′ martenzitická štruktúra, v ostatných prípadoch vznikla lamelárna štruktúra α + β fáz. Key words titanium alloys, heat treatment, solution treatment, aging treatment zliatiny titánové, spracovanie tepelné, žíhanie rozpúšťacie, vytvrdzovanie Introduction In the recent years the usage of titanium and titanium alloys has increased in various areas of industry (aerospace, chemistry, energetics and automobile industry). Titanium and titanium alloys are effectively applied in human orthopaedics and surgery as well. The most important characteristic features of these alloys are their low specific gravity, high strength and excellent corrosion resistance. Except the above mentioned properties some of the titanium alloys have also high biocompatibility which gives the possibility for their application as orthopaedical alloys. The Ti6Al4V alloy belongs to one of those which are widespreadly used for implant 1