Microstructure model for the heat-affected zone of X80 linepipe steel

被引：9

作者：

Garcin, T. ^{[1
]}

Militzer, M. ^{[1
]}

Poole, W. J. ^{[1
]}

Collins, L. ^{[2
]}

机构：

[1] Univ British Columbia, Ctr Met Proc Engn, 309-6350 Stores Rd, Vancouver, BC V6T 1Z4, Canada

[2] Evraz Inc NA, Regina, SK S4P 3C7, Canada

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Linepipe steel; Heat-affected zone; Microstructure modelling; Precipitate dissolution; Austenite grain growth; Austenite decomposition; Ferrite; Bainite; Martensite/austenite; AUSTENITE GRAIN-GROWTH; CARBON; EVOLUTION; SIZE; DECOMPOSITION; NUCLEATION; PREDICTION; PARTICLES; TOUGHNESS; DIAGRAMS;

D O I：

10.1080/02670836.2016.1142705

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An important aspect of the integrity of oil and gas pipelines is the heat-affected zone (HAZ) of girth welds where the microstructure of the as-hot rolled steel is altered with potentially adverse effects on the HAZ properties. Therefore, it is critical to evaluate the HAZ microstructure for different welding scenarios. Here, an integrated microstructure evolution model is proposed and applied to the HAZ of an X80 linepipe steel. The model considers dissolution of Nb-rich precipitates, austenite grain growth and austenite decomposition into ferrite and bainite. Microstructure maps showing the fraction of transformation products as a function of distance from the fusion line are obtained and used to compare the effect of different welding procedures on the HAZ microstructure.

引用

页码：708 / 721

页数：14

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