二,三の新しいピストン用アルミニウム合金鋳物の被削性について
1972 年 22 巻 1 号 p. 17-27
詳細
1972 年 22 巻 1 号 p. 17-27
All of JIS aluminum alloy castings for pistons contain nickel. However, studies were made of new alloys of low prices containing no nickel, but having the same properties as the conventional alloy castings. No nickel alloys such as temporarily called 8C and 8D, corresponding to JIS AC8A and AC8B, respectively, have been studied for practical use.
On the other hand, high silicon cast aluminum alloys "hyper silumin" such as temporarily called 10A 10B and 10C having high heat and wear resistances have been developed for high speed or heavy duty pistons.
In these studies, the rod specimens of the above developed alloys such as temporarily called 8C, 8D, 10A and 10C were prepared to conduct turning machinability tests and compared their machinabilities with those of existing JIS alloys for pistons.
The results showed that 8C and 8D had slightly higher machinabilities than AC8A and AC8B, respectively. However, the degree of tool wear was not negligible for these alloys. In particular, 10A and especially, 10C gave remarkable tool wear, which will be a serious problem in discussing material properties.
