2633 析出硬化型Al-4mass%Cu合金とSi添加Al-4mass%Cu合金の機械加工特性(S75-1 先端材料とレーザー加工(1),S75 先端材料とレーザー加工)

概要

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To improve the machinability of precipitation hardened aluminum alloy, turning tests have been performed for Al-4mass%Cu and Si added Al-4mass%Cu alloys. The chip breakability improved and surface roughness increased in over aged Al-4mass%Cu alloys at dry and wet cutting conditions. On the contrary, in Si added Al-4mass%Cu alloys, chip breakability more increase at heat treated condition from solution to peak aged at wet cutting condition than dry cutting condition. Moreover, from tensile tests for these alloys at wet and dry environment, fracture elongation decrease at Si added Al-4mass%Cu alloys at wet condition. And, from SEM observation of breaked chip surface for those Si added alloys, as ovserved inter-phase fracture of Si particles by deformation, chip breaking during wet cutting of Si added Al-4mass%Cu alloys controlled by Rebinder effect of lubricant.
2005-09-18