Martensite transformation in the modified high Cr ferritic heat-resistant steel during continuous cooling

被引：25

作者：

Gao, Qiuzhi ^{[1
]}

Liu, Yongchang ^{[1
]}

Di, Xinjie ^{[1
]}

Yu, Liming ^{[1
]}

Yan, Zesheng ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Jointing Technol, Tianjin 300072, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2012年 / 27卷 / 21期

基金：

中国国家自然科学基金;

关键词：

MICROSTRUCTURAL PATH-ANALYSIS; DUPLEX STAINLESS-STEEL; ISOTHERMAL MARTENSITE; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; ATHERMAL MARTENSITE; 9CR-1MO STEEL; POWER-PLANTS; GRAIN-SIZE; KINETICS;

D O I：

10.1557/jmr.2012.308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal dilation experiment and the martensite transformation features of modified high Cr ferritic heat-resistant steel upon continuous cooling were explored at various cooling rates. The "spread" martensite transformation model was introduced to investigate the influence of the cooling rate applied on the martensite transformation behaviors. The martensite fraction, martensite formation rate, and the density of martensite laths were obtained as a function of cooling rate. Both the onset and offset temperatures of the martensite transformation decrease with the increase of cooling rate, and the martensite formation rate bursts at the beginning of transformation and then reaches a peak rapidly. The fitted data based on the proposed kinetic model indicated that the aspect ratio of martensite lath decreases, instead the density of martensite laths increases, with the increase of cooling rate.

引用

页码：2779 / 2789

页数：11

共 43 条

[1] Ferritic power plant steels: remanent life assessment and approach to equilibrium [J].