CAJ | 학술논문

对钛合金Ti-6Al-4V进行了电火花加工试验研究，以加工极性、脉宽、峰值电流为试验因素，探讨其对TC4钛合金的材料去除率、电极相对损耗及工件表面微裂纹的影响规律。结果表明：占空比一定、采用正极性或负极性加工时，增加峰值电流皆可提高其材料去除率，且负极性加工影响更为显著；同时，负极性加工可获得较低的电极相对损耗。无论选用何种加工极性，增大峰值电流与脉宽，都会导致TC4钛合金加工表面出现显著的微裂纹，且负极性加工时的工件表面微裂纹密度大于正极性加工；同时，TC4钛合金加工表面皆有TiC生成，使电火花加工TC4钛合金时的材料去除率降低。
대태합금Ti-6Al-4V진행료전화화가공시험연구，이가공겁성、맥관、봉치전류위시험인소，탐토기대TC4태합금적재료거제솔、전겁상대손모급공건표면미렬문적영향규률。결과표명：점공비일정、채용정겁성혹부겁성가공시，증가봉치전류개가제고기재료거제솔，차부겁성가공영향경위현저；동시，부겁성가공가획득교저적전겁상대손모。무론선용하충가공겁성，증대봉치전류여맥관，도회도치TC4태합금가공표면출현현저적미렬문，차부겁성가공시적공건표면미렬문밀도대우정겁성가공；동시，TC4태합금가공표면개유TiC생성，사전화화가공TC4태합금시적재료거제솔강저。
EDM experiment research on titanium alloy Ti-6Al-4V is conducted to explore its material removal rate,electrode relative wear and microcrack density. Polarity,pulse duration and peck current are selected as experimental factor. The result shows that the increasement of peck current could improve material removal rate ,and it is more dramatically during negative polarity machining;meanwhile,the lower electrode relative wear could be reached if chosing negative polarity. With the increasement of pulse duration and current ,the machined surface of TC4 alloy comes out the intensive microcrack,and it is more dramatically when choosing negative machining. At the same time,TiC is emerged on the machined surface,which is leaded to the lower material removal rate.