Non classical eutectoid decomposition products morphologies in Fe-Cr-C and Fe-Cr-Mo-C steels

被引：0

作者：

Goldenstein, Helio ^{[1
]}

Cifuentes, John Alexander Bustos ^{[1
]}

Sinatora, Amilton ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Met & Mat Engn, BR-05508900 Sao Paulo, Brazil

来源：

SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS 2005, VOL 1 | 2005年

关键词：

austenite decomposition; morphology; kinetics;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The morphology of eutectoid microconstituents originated from the austenite isothermal decomposition above the TTT curve's bay of both a high purity Fe-5.2%Cr-0.46%C alloy and a commercial Fe-C-Mo tool steel are described. Microstructural chances were observed with the gradual lowering of the transformation temperature in both alloys: formation of classical lamellar pearlite at intermediate temperatures pearlite at high temperatures, ragged "arborescent" morpholologies at intermeduate temperatures and acicular ferrite plus carbide aggregates at low temperatures near the bay. The carbides were characterized using optical and electron microscopy and X-Ray diffraction of extracted carbides: the result was compared with thermodynamic calculations. In both steels the precipitation of M7C3 alloy carbides was associated with the unusual morphologies.

引用

页码：673 / 686

页数：14

共 26 条

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