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.

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  • アトマイズ法により作製された亜共晶Ｆｅ‐Ｃ系鋳鉄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
  • アトマイズホウ ニ ヨリ サクセイ サレタ アキョウショウ Fe-Cケイチュウ
  • Mechanical Properties of Atomized Cast-iron Porous Sinterde Body
  • アトマイズ鋳鉄粉末多孔質焼結体の強度特性

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Abstract

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 Fe3C.

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