水素ガス雰囲気中でのセメンタイト粉末の還元および焼結処理によるFe-C合金の創製(相変態・材料組織)

概要

論文の詳細を見る
In recent years, it has become important to reduce emission of CO_2 from the iron and steel making process in terms of preserving ecological environment. Cementite is recognized as a new iron resource because there is no CO_2 emission on the reduction of cementite to iron. In this study, a new steel making process through reduction and sintering treatment of cementite powder was proposed, and microstructure of the material obtained by this process was examined by scanning electron microscopy and EBSP analysis. The cementite powder obtained by mechanical alloying technique was compacted and then subjected to the reduction and sintering treatment in H_2 gas atmosphere at 1073-1273K in order to obtain bulky steel materials. The relative density of sintered material became 95% or more when the sintering was performed at 1173K. The sintered material has ferrite-pearlite structure of the grain size of around 5 μm. This result demonstrates that the reduction and sintering of cementite is one of useful methods to fabricate fine-grained steel without CO_2 emission.
社団法人日本鉄鋼協会の論文
2007-03-01