On coarsening of cementite during tempering of martensitic steels

被引：12

作者：

Hou, Ziyong ^{[1
]}

Babu, R. Prasath ^{[1
]}

Hedstrom, Peter ^{[1
]}

Odqvist, Joakim ^{[1
]}

机构：

[1] KTH Royal Inst Technol, Dept Mat Sci & Engn, Brinellvagen 23, SE-10044 Stockholm, Sweden

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 07期

关键词：

Martensitic steel; tempering; precipitation; coarsening; particle size distribution; PARTICLE-SIZE DISTRIBUTION; OSTWALD RIPENING THEORIES; NICKEL-BASE SUPERALLOYS; CARBIDE PRECIPITATION; ALLOYING ELEMENTS; KINETICS; STRENGTH; BEHAVIOR; GROWTH; MICROSTRUCTURE;

D O I：

10.1080/02670836.2020.1740380

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coarsening of cementite in a martensitic Fe-1C-1Cr (wt-%) alloy upon tempering at 700 degrees C is investigated. When considering that the main location of cementite is at grain boundaries, classical coarsening theory can accurately predict the mean size evolution, while the predicted size distribution evolution disagrees with the experimentally observed log-normal distribution maintained throughout the whole tempering (5000 h). We conclude that classical theory of coarsening, as given by Lifshitz-Slyozov-Wagner and included in the Langer-Schwartz Kampmann-Wagner numerical approach for modelling precipitation reactions, is not fully adequate to simulate coarsening of cementite for tempering in practice.

引用

页码：887 / 893

页数：7

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