アトマイズ法により作製された亜共晶Fe-C系鋳鉄系粉末のパルス通電焼結特性(III) -アトマイズ鋳鉄粉末多孔質焼結体の強度特性- Pulse Electric Current Sintering Behavior of Atomized Cast-iron Powder of Fe-C System Containing Hypo-eutectic Carbon (III) -Mechanical Properties of Atomized Cast-iron Porous Sintered Body-
The relationships between the bending strength and the relative density in the atomized cast-iron porous sintered bodies, which were made by the vacuum sintering method and the pulse electric current sintering method, were studied. The results were as follows:<BR>(1) In the vacuum sintered body, the bending strength depended on the carbon content of powder. The bending strength of both the relative density over 65% of Fe-2.46mass%C compact and the relative density over 90% of Fe-3.96mass%C compact were dependent on the particle size, and the bending strength of the sintered body made from small size powder was larger than that of made from large size powder.<BR>(2) In the pulse electric current sintered body, the bending strength did not depend on the particle size, the carbon content and the sintering condition.<BR>(3) In the relative density range from 60% to 90%, the bending strength of the vacuum sintered body was larger than that of the pulse electric current sintered body. Over the relative density 90%, the bending strength of the pulse electric current sintered body was larger than that of the vacuum sintered body. In the low relative density range (60-90%), the bending strength was affected by the pore shape. However, in the high relative density range (90%-), the bending strength was influenced by the size of Fe<SUB>3</SUB>C.
粉体および粉末冶金 45(8), 715-720, 1998-08-15
Japan Society of Powder and Powder Metallurgy