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

页码：263 / 271

页数：9

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