ON THE M_7C_3 IN Cr27 CAST IRON

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Acta Metallurgica Sinica (English Letters) ›› 1992, Vol. 5 ›› Issue (6): 459-464.

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ON THE M_7C_3 IN Cr27 CAST IRON

LI Yuqing WANG Cirong GU Zhaofeng Research Institute of Daye Steel Works,Huangshi,China Senior Engineer,Research Institute of Daye Steel Works,Huangshi 435001,China

Received:1992-12-25 Revised:1992-12-25 Online:1992-12-25 Published:2009-10-10

Abstract

Abstract: Determination of(Fe,Cr)_7C_3 in Cr27 cast iron results about 30 v.-%.Minor Si and Mn are present.Sectional area of the M_7C_3 grains is 1—50μm~2.Combining matrix analysis of elec- tron diffraction pattern with calculated angle between plane traces,{011}twins and also {013}twins producing local environment for Ru_7B_3 are observed in the orthorhombic M_7C_3. A crystallographic model for M_7C_3 is proposed.

Key words: cast iron, M_7C_3, twin, plane trace, Cr 27

LI Yuqing WANG Cirong GU Zhaofeng Research Institute of Daye Steel Works,Huangshi,China Senior Engineer,Research Institute of Daye Steel Works,Huangshi 435001,China. ON THE M_7C_3 IN Cr27 CAST IRON[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(6): 459-464.

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ON THE M_7C_3 IN Cr27 CAST IRON

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