Effect of thermal treatment on the evolution of delta ferrite in 11Cr-3Co-2.3W steel

被引：11

作者：

Cui, Chenshuo ^{[1
]}

Gao, Xiuhua ^{[1
]}

Su, Guanqiao ^{[1
]}

Gao, Cairu ^{[1
]}

Liu, Zhenguang ^{[2
]}

Misra, R. D. K. ^{[3
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China

[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang, Peoples R China

[3] Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steel Res, El Paso, TX 79968 USA

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2018年 / 34卷 / 17期

基金：

国家高技术研究发展计划(863计划);

关键词：

Delta ferrite; precipitation; Laves phase; annealing; dissolution; AUSTENITIC STAINLESS-STEELS; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; MARTENSITIC STEEL; LAVES PHASE; CREEP; TEMPERATURE; STRENGTH; TRANSFORMATIONS;

D O I：

10.1080/02670836.2018.1510072

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of thermal treatment on the evolution of delta ferrite was studied in 11Cr-3Co-2.3W steel. Ferrite-forming alloy elements promoted the formation of delta ferrite during thermo-mechanical processing. The results of JMatPro and chromium equivalent calculations indicated that 11Cr-3Co-2.3W steel partially contained delta ferrite. Cr and W were segregated in/around delta ferrite. Delta ferrite had a bamboo-type morphology and it contained MX-type carbonitrides inside and the Laves phase at the interface between delta ferrite and martensite. On annealing, delta ferrite dissolved especially during the early stage of annealing. After ageing at 600 degrees C for 500 h, some Laves phases were observed in delta ferrite which is regarded as a favourable nucleation site. In the meantime, its precipitation resulted in the reduction of dissolved W and Mo in the matrix.

引用

页码：2087 / 2096

页数：10

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