Structural Refinement of 15%Cr-2%Mo White Irons

Adel Nofal; Reham Reda; Khaled M. Ibrahim; Abdelhamid Hussein

doi:10.4028/www.scientific.net/KEM.457.231

Paper Titles

Microstructure and Properties of Isothermally Quenched High Boron White Cast Iron
p.207

Effect of Rare Earth-Al Additions on the Structural Variations of Medium Carbon Fe-B Cast Alloy
p.213

Influence of Boron Concentration on the Corrosion Resistance of High Boron White Cast Iron to Liquid Zinc Bath
p.219

Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron White Cast Iron
p.225

Structural Refinement of 15%Cr-2%Mo White Irons
p.231

Effect of Chromium and Vanadium Contents on Continuous Cooling Transformation Behavior of Multi-Component White Cast Iron
p.237

Abrasion Behavior of High Cr-V-Nb Cast Iron
p.243

Wear Characteristics of Spheroidal Carbides Cast Irons in Uniaxial Rotary Glass Shredder
p.249

High Temperature Erosion Behaviors of High V-Cr-Ni Spheroidal Carbides Cast Iron
p.255

HomeKey Engineering MaterialsKey Engineering Materials Vol. 457Structural Refinement of 15%Cr-2%Mo White Irons

Structural Refinement of 15%Cr-2%Mo White Irons

Abstract:

This research aims at studying the structural refinement of 15%Cr-2%Mo hypo- and hypereutectic white irons through dynamic solidification and Nb-alloying (1-2%Nb). Solidification behavior was studied using DSC. Microstructure investigation and analysis were performed using optical, image analyzer as well as SEM, EDX and XRD analysis. Refinement mechanisms proposed involved both enhancing nucleation and altering the growth process of the primary and eutectic phases either by fragmentation of the primary growing phase in the case of dynamic solidification or by consuming the available carbon from the liquid and hence the amount and size of M7C3 will decrease in the case of addition of Nb-alloying. Nb has higher affinity to carbon during solidification, higher formation temperature than the main microstructure constituents and forms fine carbide so Nb achieves refinement of the microstructure.

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Periodical:

Key Engineering Materials (Volume 457)

Pages:

231-236

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.457.231

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Online since:

December 2010

Authors:

Adel Nofal, Reham Reda, Khaled M. Ibrahim, Abdelhamid Hussein

Keywords:

Combined Action, Dynamic Solidification, Hypereutectic, Nb, Solidification Behavior, Structural Refinement Hypoeutectic, White Iron

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