The Development of Free Machining Sintered Metal Including Non-metal Additives : 1st Report, Sintered Iron

Abstract

Mixtures of ferrous metal powders and non-metal additives are sintered and the sintered materials are cut. Then, the progress of tool wear during cutting is examined, and the most effective additives for prolonging tool lift are found. The conclusions obtained in the experiment are as follows : (1) The most effective additives are glass, talc and boron nitride. (2) By the addition of a 3% glass to the ferrous material, tool life has been increased by an about factor of sixty. (3) By the addition of a glass and talc mixture to the ferrous material, tool life is prolonged still more.