Abstract

The influence of the temperature, applied stress, degree of creep deformation, and aging time on the formation of Z-phase (CrVN) particles in 9% Cr 10Kh9K3V2MFBR martensitic steel at temperatures of 650 and 675°С upon long aging is studied in this work. The particles with a chemical composition determined by energy dispersive spectrometry as 50% (Cr + Fe) and 50% (V + Nb) are detected and identified as particles of the Z‑phase. An increase in the creep test time at both temperatures led to the growth of Z-phase particles. An increase in the temperature provokes earlier nucleation of small Z-phase particles with a change in the mechanism of their nucleation. An enlargement of particles is observed upon localization of plastic deformation. Long-term annealing at temperatures of 650 and 675°C does not lead to the formation of Z-phase particles. Plastic deformation has a crucial effect on the formation of Z-phase particles in steels containing 9% Cr. The temperature, time, applied stress, and strain localization are aggravating factors that cause the growth of this phase.

中文翻译：

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蠕变和长时间退火条件对Z相颗粒形成的影响

摘要

研究了温度，外加应力，蠕变变形程度和时效时间对9％Cr 10Kh9K3V2MFBR马氏体钢在650和675°С温度下长时效时Z相（CrVN）颗粒形成的影响。工作。通过能量色散法测定的化学成分为50％（Cr + Fe）和50％（V + Nb）的颗粒被检测到并鉴定为Z相颗粒。在两个温度下蠕变测试时间的增加导致Z相颗粒的生长。温度升高引起小Z的早期成核相粒子的成核机理发生了变化。在塑性变形的局部观察到颗粒的增大。在650和675℃的温度下长期退火不会导致Z相颗粒的形成。塑性变形对含9％Cr的钢中Z相颗粒的形成至关重要。温度，时间，施加的应力和应变局部化是导致该相生长的加剧因素。