1969 Volume 35 Issue 418 Pages 726-732
This paper gives the datum for the design of sintered metal gears, which is based on experimental results.
By comparing the notch characteristics of mean density test pieces with those of high density, it is shown that the distortion of material under machined surface has an influence upon the strength of sintered metal. Moreover, the property of the metal is explained by using the mechanism of bending fatigue fracture for specimens with different kinds of notches.
The results obtained are summarised as follows :
(1) The notch factor of sintered metal material has a low value and the size effect is very high.
(2) The distortion of material under machined surface has a great influence upon the strength of sintered metal.
(3) Compressive fatigue strength is much more than tensile fatigue strength.
