Experimental Investigation On Performance Of Hydrogenated TC4 Titanium Alloy

The cutting machining technology of titanium alloys is an indispensable means of the machining of titanium alloys component, but the processing has been faces with the problem of cutting inefficiency, short cutting life, high processing cost and so on. Thermohydrogen treatment (THT) of titanium alloys can change the mechanical and physical properties of titanium alloys under room temperature, thereby, improving the performance of cutting machining. Taking the hydrogenated TC4 titanium alloy as the research object, the improvement mechanics of hydrogen deduced cutting performance was researched in this paper.The main work is to explore the improvement of hydrogen deduced cutting performance of TC4 titanium alloy by cutting force, cutting temperature and cutting-tool wear. At first, the cutting force and cutting temperature of the hydrogenated TC4 titanium alloy was obtained by Kistler dynamometer and natural thermocouple method, as well as the metallurgical structure and microhardness. Based on the above experiment researches, the effect of THT technology on the hydrogenated TC4 titanium alloy was analyzed, which confirmed an appropriate technology and hydrogen content.Through the cutting experiments of the hydrogenated TC4 titanium alloy by specified THT technology, result shown that presence of appropriate hydrogenation in the TC4 titanium alloy could improve the cutting performance, reduce the cutting force and temperature, and it also indicated that there were close relation to hydrogen deduced cutting performance and the quantity used in cutting. On the analysis of the XRD and SEM, it is verified that the cutting-tool wear condition and cutting-tool life are improved by appropriate hydrogenation.