The Machining Characteristics of Yttrium-Iron Alloy by Electrical Discharge Machining

• Main Authors: Shengzhi Xie, 謝盛志
• Other Authors: Shun Long Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/32831321473297031164

碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 101 === This study investigated the machining characteristics of yttrium-iron alloy by electric discharge machining (EDM) in two different liquids (kerosene, deionized water).In the experiment, the electrode material is copper ,the machining parameter are pulse duration and discharge current. X-ray powder diffraction (XRD), SEM, surface roughness tester, micro Vickers hardness were used as testing apparatus and measuring the material hardness, surface roughness, the ecast layer and phase .The results revealed that the material removal rate of kerosene is greater than deionized water and the electrode consumption rate of kerosene is lower than deionized water. Roughness comparison after using kerosene and deionized water as di-electric liquid during EDM, Yttrium-iron alloy has higher surface roughness with deionized water than with kerosene. The results can be shown on the XRD pattern and hardness chart. The hardness of Yttrium alloy work piece is higher when deionized water was used when compared to kerosene was used, and this is attributed by increment of current. Increasing percentage of YFe2H2.014, the hardness will increase as well . Kerosene di-electric liquid will result in work piece recast layer's thickness higher than deinoized water. Recast layer thickness away deionized water then with the discharge current and the pulse duration increases. By comparing the results above, EDM machining with Yttrium-iron alloy work piece while using kerosene as electrical discharge machining fluid will have a better charactristics.