The Effect of Machining Parameters on Weight Removal in Chemical Machining of Titanium Alloy

Abstract

Chemical machining (CHM) processes are one of thenon-conventional machining processes the materialremoval occurs when the machined part contact with astrong chemical etchant solution. This study aiming tostudy the influences of machining time, machiningtemperature and the concentration of the used etchantsolution on the weight removal of chemically machinedtitanium alloy, in this study two different etchantconcentration of mixture acids consist of hydrofluoricacid (HF) mixed with nitric acid (HNO3) in specificquantities are used, the first etchant concentration consistof (9 vol.% HF , 14 VOL.% HNO3 in 77 vol.% distilledwater) the second concentration (12 vol.% HF, 16 vol.%HNO3 in 72 vol.% distilled water) to chemically machineeight specimens of (30 x 10 x 1) mm size by using fourlevel of machining time (4, 6, 8 and 10) min and fourlevel of machining temperature (35, 40, 45 and 50)