MORPHOLOGY OF CEMENTITE DECOMPOSITION IN AN FE-CR-C ALLOY

被引：39
作者：
LIU, ZK
AGREN, J
机构：
[1] Division of Physical Metallurgy, Royal Institute of Technology, Stockholm
来源：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1991年 / 22卷 / 08期
关键词：
D O I：
10.1007/BF02646499
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dissolution of spheroidal cementite in austenite at 910-degrees-C has been studied by means of scanning and transmission electron microscopy. Three different morphologies of transformation have been observed. Most of the particles undergo a more or less homogeneous shrinkage. However, some of the particles transform to austenite by a Widmanstatten type of reaction, whereby austenitic plates form inside the cementite. It is also observed that some of the cementite transforms to M7C3 carbide and austenite by a eutectoid reaction. The results can be understood by considering the phase diagram and assuming that local equilibrium prevails at the phase interface during the reaction.
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页码：1753 / 1759
页数：7
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