THE CHANGES IN STRUCTURE OF STEEL P91 AFTER SHORT ANNEALINGS

被引：0
|
作者：
Kral, Lubomir [1 ]
Cermak, Jiri [2 ]
Kral, Petr [1 ]
机构：
[1] AS CR, Vvi, Inst Phys Mat, Prague, Czech Republic
[2] CEITEC IPM, Brno, Czech Republic
来源：
METAL 2015: 24TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS | 2015年
关键词：
P91; carbides; carbon; precipitation; MARTENSITE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase composition of the steel P91 during annealing was studied with the aim to reveal the evolution of new phases. In this paper, the precipitation was characterized using energy-dispersive X-ray spectroscopy (EDS) and electron diffraction in transmission microscopy (TEM). Only Nb-rich particles were found in the studied samples austenitized at 1423 degrees C for 20h and water cooled. After tempering at 673 degrees C for 2 h, the formation mainly M3C type carbides and after tempering at 873 degrees C for 2 h, the formation of M7C3 and M23C6 was observed. These structure changes play an important role for stability and also carbon diffusion.
引用
收藏
页码：729 / 735
页数：7
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