Two-Step Quenching & Partitioning of 42SiCrB Steel

Abstract:

In recent years, Quenching and Partitioning (Q&P) became an interesting thermal process route for semi-finished high strength low alloyed steel components. Recent publications demonstrate promising mechanical properties with considerable ductility enhancement. To assess the potential of the two-step Q&P heat treatment in seamless tube production, corresponding tests are carried out on 42SiCrB steel (0.42wt% C, 2.0wt% Si, 1.3wt.% Cr, 0.6wt.% Mn, 0.002wt.% B). Feasible Q&P heat treatment process parameters are identified using the Constrained-Carbon-Equilibrium (CCE) model, carbon diffusion calculations and isothermal TTT curves with previous quenching. Furthermore achieved volume fraction of retained austenite is analyzed by XRD experiments.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 738-743
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.738
• Online since: May 2014
• Authors: Niko Grosse-Heilmann*, Isabella Maria Zylla, Ernst Kozeschnik, Andreas Peters
• Keywords: Martensite, Quenching and Partitioning (Q&P), Retained Austenite, TRIP

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