摘要
Abstract
In order to understand the processing performance of titanium alloy TC4,titanium alloy TC4 was machined using short electric arc machining system,the influences of short arc machining parameters on the material removal rate and surface quality of titanium alloy TC4 are studied,and the processing performance of titanium alloy TC4 was compared with that of stainless steel PH17-4 under the same processing conditions.The primary and secondary factors affecting the quality of the machined surface and the optimal machining parameters were determined by means of orthogonal test,and the machined surface layer of the titanium alloy were detected and analyzed.The results show that in short electric arc machining,when the discharge gap is reduced and the power supply voltage increases,the removal rate of the material is increased,the processing efficiency is improved,but the surface quality of the workpiece is reduced;when the rotating speed of workpiece is increased,the surface roughness variation of workpiece is not obvious,but the material removal rate increases;under the same processing conditions,the removal rate and surface quality of titanium alloy were lower than that of stainless steel.The sorting of the main and secondary factors affecting the surface roughness of the titanium alloy TC4 is the power supply voltage,the discharge gap and the spindle speed,and the optimal processing scheme is the discharge gap of 0.3 mm,the spindle speed of 118 r/min,the power supply voltage of 10 V.After processing,the mechanical properties and microstructure of the surface layer of the titanium alloy are basically stable,the thickness and hardness of the overheated layer were not obviously changed,and therefore,the short electric arc machining does not produce difficulty to subsequent fine machining,which provides a theoretical basis for the application of short arc machining technology in the processing of titanium alloy materials.关键词
钛合金TC4/短电弧加工/电加工参数Key words
titanium alloy TC4/short electric arc machining/electrical machining parameter分类
矿业与冶金
