Microstructural Features Intervening in Hot Workability of Free Cutting Steels

N. Gonzalez; M.C. Revilla; Beatriz López; J.M. Rodriguez-Ibabe

doi:10.4028/www.scientific.net/MSF.783-786.777

Paper Titles

Revealing the Strain-Hardening Mechanisms of Advanced High-Mn Steels by Multi-Scale Microstructure Characterization
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The Mechanical and Deformation Behavior of TWIP Steel Prepared by Directional Solidification
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Thermodynamic and Kinetic Calculation of Non-Equilibrium Microstructure Design of TRIP Steel
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Effect of Heating Rate and Silicon Content on Kinetics of Austenite Formation during Continuous Heating
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Microstructural Features Intervening in Hot Workability of Free Cutting Steels
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Microstructure-Mechanical Properties Relationships for Complex Microstructures in High Strength Steels
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Assessing Dislocation Densities in the Gamma Prime Phase of a Superalloy from High Resolution Diffraction Peak Shape
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Surface Roughness and Friction in Hot Rolling of Stainless Steels
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Semi-Solid Processing of Powder Steels in Cryogenically-Cooled Die
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Microstructural Features Intervening in Hot Workability of Free Cutting Steels

Abstract:

Free cutting steels belong to a family associated with hot workability problems. This study has focused on the analysis of microstructural features located near the surface of the billet before and after reheating and how they can affect the nucleation/propagation of damage during initial hot working operations. The work has been done with free cutting steels containing sulfur contents ranging from 0.32 to 0.42%. The relevance of clustering of inclusions, their location at grain boundaries or triple points and the influence of softening mechanisms (as recrystallization) have been considered with the help of several parameters determined by image analysis techniques.