Experimental and computational study of cementite precipitation in tempered martensite

被引：24

作者：

Zamberger, S. ^{[1
]}

Whitmore, L. ^{[2
]}

Krisam, S. ^{[2
]}

Wojcik, T. ^{[2
]}

Kozeschnik, E. ^{[2
]}

机构：

[1] Voestalpine Stahl Donawitz GmbH, A-8700 Leoben, Austria

[2] Vienna Univ Technol, Inst Mat Sci & Technol, Christian Doppler Lab Early Stages Precipitat, A-1040 Vienna, Austria

来源：

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING | 2015年 / 23卷 / 05期

关键词：

microalloyed steels; cementite precipitation; precipitation kinetics; MULTICOMPONENT MULTIPHASE SYSTEMS; CARBO-NITRIDE PRECIPITATION; PARAEQUILIBRIUM CEMENTITE; IRREVERSIBLE-PROCESSES; RECIPROCAL RELATIONS; GERM-FORMATION; FE; KINETICS; GROWTH; EQUILIBRIUM;

D O I：

10.1088/0965-0393/23/5/055012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, we investigate cementite precipitation during tempering of quenched 0.3C-1Cr-1Mo steel with martensitic microstructure at temperatures between 400 and 700 degrees C. Particular focus is laid on the evolution of the Cr-content of particles during tempering, where we observe a transition from fast C diffusion-controlled to slow Cr diffusion-controlled kinetics. For characterization of the precipitates, transmission electron microscopy (TEM) in combination with thermokinetic simulation is applied. With a new concept for treatment of inner-particle diffusion in the framework of the SFFK model implemented in the software MatCalc, a successful simulation of cementite precipitation kinetics and Cr enrichment of precipitates is carried out over the entire temperature range.

引用

页数：22

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