QUANTITATIVE ANALYSIS OF STABILITY OF 9% Cr STEEL MICROSTRUCTURE AFTER LONG-TERM AGEING

被引：14
作者：
Golanski, G. [1 ]
Jasak, J. [1 ]
Zielinski, A. [2 ]
Kolan, C. [1 ]
Urzynicok, M. [3 ]
Wieczorek, P. [1 ]
机构：
[1] Czestochowa Tech Univ, Inst Mat Engn, 19 Armii Krajowej Av, PL-42200 Czestochowa, Poland
[2] Inst Ferrous Met, 12-14 K Miarki Str, PL-44100 Gliwice, Poland
[3] Boiler Elements Factory Zelkot, Koszecin, Poland
来源：
ARCHIVES OF METALLURGY AND MATERIALS | 2017年 / 62卷 / 01期
关键词：
High-chromium martensitic steels; microstructure; carbide precipitation; MECHANICAL-PROPERTIES; HIGH-TEMPERATURE; CAST STEEL; P92; STEEL; CREEP; STRAIN;
D O I：
10.1515/amm-2017-0040
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The paper presents the results of research on the microstructure of martensitic X10CrMoVNb9-1 (P91) and X13CrMoCoVNbNB9-2-1( PB2) steel subject to long-term ageing at the temperature of 620 degrees C and holding times up to 30 000 hours. The microstructural tests of the examined steel types were performed using a scanning microscope Joel JSM - 6610LV and a transmission electron microscope TITAN 80 - 300. The stability of the microstructure of the investigated steels was analyzed using a quantitative analysis of an image, including measurements of the following: the density of dislocations inside martensite/subgrain laths, the width of martensite laths, and the mean diameter of precipitates. It has been concluded that during long-term ageing, the microaddition of boron in PB2 steel significantly influenced the slowing of the process of degradation of the martensitic steel microstructure, as a result of slowing the process of coagulation of M23C6 carbides and Laves phase. It had a favorable effect on the stabilization of lath microstructure as a result of retardation of the processes of recovery and polygonization of the matrix.
引用
收藏
页码：263 / 271
页数：9
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