Experimental research on effect of hydrogen on machinability of titanium alloy when the temperature of permeating hdrogen is at 800

The temperature of hydrogen heat treatment for the experimental workpieces is 800℃. By turning testing workpieces of different hydrogen content Ti6Al4V alloy,measuring cutting force and surface roughness as well as observing chip morphology,the effect of hydrogen content on machinability of Ti6Al4V alloy has been studied. Results of this experiment indicate that machinability of Ti6Al4V alloy improves with increasing hydrogen content,and there is an optimal range of hydrogen content,in excess of the range,with the hydrogen content increasing,machinability of Ti6Al4V alloy is reduced.