Effect of austenitization temperature on phase transition features of high Cr ferritic heat-resistant steel

被引：2
|
作者：
Gao, Qiuzhi [1 ]
Liu, Yongchang [1 ]
Di, Xinjie [1 ]
Yu, Liming [1 ]
机构：
[1] Tianjin Univ, Tianjin Key Lab Adv Jointing Technol, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
来源：
ADVANCED MATERIALS AND PROCESSES II, PTS 1-3 | 2012年 / 557-559卷
基金：
中国国家自然科学基金;
关键词：
high Cr ferritic heat-resistant steel; differential scanning calorimeter; austenitization temperature; delta-ferrite; thermo-calc computation; 9CR-1MO STEEL; POWER-PLANTS; MICROSTRUCTURE;
D O I：
10.4028/www.scientific.net/AMR.557-559.175
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phase transformation of high Cr ferritic heat-resistant steel has been investigated by using differential scanning calorimeter and predicted by Thermo-calc calculation. The steel specimens were hot rolled and followed by air cooling, and then heated from room temperature up to different austenitization temperature as 800 degrees C, 900 degrees C, 1000 degrees C and 1100 degrees C. The DSC curves during heating process showed that the magnetic transition temperature and the A(c1) temperature are 744.9 degrees C and 850.9 degrees C, respectively. The austenitization range was about 58 degrees C. The onset and offset temperature of martensite transformation both increase with the increase of austenitization temperature. The experimental results and the Thermo-calc calculated results both displayed that M23C6 carbides precipitated at around 950 degrees C, and delta-ferrite started to form at about 1020 degrees C.
引用
收藏
页码：175 / +
页数：2
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