Abstract
The tensile strength of sintered iron and alloyed iron compacts have been analyzed statistically by using three types of iron powders produced by different process. The results obtained were summarized as follows:
(1) The tensile strength of all sintered iron compacts were scattered according to the normal distribution curves in spite of difference in material and the sintered density.
(2) Sintered iron compacts produced by fine powder showed the highest tensile strength. The coefficient of variation in tensile strength had a tendency to become high as the iron powder particle size is increasing and the density of sintered compact is decreasing.
(3) The tensile strength and its coefficient of variation in sintered compacts produced by blended iron powder were similar to those of compacts produced by single powder.
(4) The coefficient of variation in tensile strength of sintered alloyed iron compacts was increased with addition of Cu, while the addition of Ni had slightly influence on the coefficient of variation.
