抄録
A new type of free cutting alloy was developed which is basically of an anticorrosive and surface treatable Al-Mg-Si system and contains Pb, Sn and others for machinability. Its drilling machinablity was compared with those of a free cutting aluminum alloy 2011, afree cutting brass and a free cutting steel. The drilling machinability was examined on 5056 alloys having different compositions for different usages and processing and on high strength 2017 alloy. The developed alloy has good drilling machinabilities such as reduction of drilling time and easy chip treating next to 2011. The 5056 alloys having different compositions have nearly the same and inferior drilling machinabilities.
