SURFACE HARDENING OF TITANIUM WITH METALLOID ELEMENTS

摘要

The various surface hardening processes have been examined to determine their applicability to titanium and its alloys. The experimental study included the known hardening effect of nitrogen, oxygen addition by heating in air, carburising, and the addition of hydrogen.nThe treatments in purified nitrogen included a number of special titanium-base binary alloys and several commercial alloys. The titanium* base vanadium and boron alloys developed the most promising final surface hardness.nThis report contains data describing the notched-bar impact properties and wear resistance of nitrided unalloyed titanium.nA complete resume of the treatment of unalloyed titanium in molten borax is included, along with information on dissociated ammonia and fused salt bath treatments.