Study on the machinability of magnesium alloy (2nd Report)

Abstract

Being continued from the tests of AZ63 in the previous report, cutting tests were conducted for turning machinability on magnesium casting alloys, i.e., AZ96-T6 and AZ92-T6. The tests were conducted for the determination of machinability by the results of cutting resistance, roughness of finished surface, chips treatment, chips firing, etc.
The results obtained were as follows.
There was no great difference of cutting resistance between AZ91 and AZ92 and their resistances were slightly higher than that of AZ63, but they were not so high as compared with those of other materials. The cut surface of the both materials were considerably well finished, which showed better surface than that of aluminum alloys. The chips of AZ91 were in shorter fragment than those of AZ92 so that the former was easier in treatment than the latter. In these experiments, these was almost no risk of firing in cutting of AZ92 as AZ63, but the chips of AZ91 were easy to fire in cutting. The risk of firing was more frequent in smaller depth of cut, smaller feed, and higher cutting speed.