金属粉の瞬間抵抗焼結法に関する研究(第2報) : 鉄粉の抵抗焼結について

概要

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Experimental studies were made on the flash resistance sintering of iron powder. The influences of electric charging and processing conditions on the mechanical properties of sintered compacts were studied. The results obtained are as follows. (1) In order to obtain high density products, pressure more than 1 ton/cm2 and correct sintering time are necessary. (2) The density and tensile strength of the sintered compacts from electrolytic iron powder are higher than those of compacts from Hoganas iron powder. (3) The finer the particle size of the iron powder used, the denser the structure of the sintered compacts obtained. Among the compacts blended in various weight ratios of coarse to fine iron powders, the compact blended with same weight of powders showed the highest sintered density. (4) To get the sintered products with high density and uniform structure, acute angle and high projection on the sample are prohibited. (5) Application of thin refractory metal plates between the electrode and the metal powder is effective to obtain high density sintered products. (6) On the apparent density and tensile strength of the sintered compacts, the influence of the input power is greater than that of sintering atmosphere.
社団法人粉体粉末冶金協会の論文