New steel making process through reduction and sintering of cementite powder

被引：0

作者：

Ouchida, N ^{[1
]}

Egashira, M ^{[1
]}

Nakashima, K ^{[1
]}

Tsuchiyama, T ^{[1
]}

Takaki, S ^{[1
]}

机构：

[1] Kyushu Univ, Dept Mat Sci & Engn, Fukuoka 812, Japan

来源：

14TH CONGRESS OF INTERNATIONAL FEDERATION FOR HEAT TREATMENT AND SURFACE ENGINEERING, VOLS 1 and 2, PROCEEDINGS | 2004年

关键词：

cementite; powder metallurgy; reduction; sintering; hydrogen;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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 was compacted under high pressure up to 1000MPa, and then reduced during sintering in a hydrogen (H-2) gas atmosphere at elevated temperatures. The cementite compacts were completely reduced by the sintering at 1073K to 1273K for l8ks. The relative density of sintered material became 95% or more when the temperature was elevated above 1173K. The SEM observation and EBSP analysis indicated that the obtained steel has equiaxed ferrite-pearlite structure with grain size of around 5 mu m and the crystallographic orientations of ferrite grains are randomly distributed.

引用

页码：76 / 79

页数：4