Abstract:
Based on
R.H.Yü's Empirical Electron Theory of Solids and Molecules, the
austenite structure in industry alloys is analyzed by using the
Bond Length Difference (BLD) method. Combined with obtained
information of Valence Electron Structure (VES) of the
materials, the following are proposed: 1. C-Me segregation
regions exist in the austenite of Fe-C-Me alloys. 2. C-Me
segregation resists phase transformation. The structures,
morphologies and properties of transformed products can be
changed by the murual action of such resistance and driving
force of phase transformation. 3. New explainations on some
metallography problems can be made from C-Me segregation: ⑴ The
formation residual austenite; ⑵ The incompleteness of bainite
transformation in some alloys and bainite morphology variation;
⑶ The formation of both dislocation and twin martensite.
Key words:
Empirical electron theory of solids
and molecules Material Phase transformation
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