Titanium-Based Sintered Alloy with Improved Wear Resistance

摘要

Titanium sintered alloys have a special use in the technique because they have multiple advantages. Titanium and its alloys are characterized by remarkable physic-chemical, mechanical and technological properties. However, there are several such properties that have a lower value, such as friction behavior. Titanium and its alloys are recognized as having low wear resistance. Titanium alloyed with certain elements, such as tin or graphite, can lead to alloys with improved wear properties, with the specification that graphite does not exceed 1%. The technology of manufacturing titanium-based alloys is specific to powder metallurgy, but it also has some originality by choosing special sintering cycles. The paper aims to present a tribological characterization of the sintered TiAl alloy; the method uses the disc of the alloy that has been researched in contact with an alumina ball. The paper presents a detailed analysis of the wear tests carried out for four types of specimens obtained by different methods.