EVOLUTION OF SECOND PHASE IN 2.25Cr-1Mo-0.25V STEEL WELD METAL DURING HIGH TEMPERATURE TEMPERING

被引：0

作者：

Tao Peng ^{[1
]}

Zhang Chi ^{[1
]}

Yang Zhigang ^{[1
]}

Hiroyuki, Takeda ^{[2
]}

机构：

[1] Tsinghua Univ, Key Lab Adv Mat, Minist Educ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

[2] Kobe Steel Ltd, Mat Design Sect, Mat Res Lab, Kobe, Hyogo 6512271, Japan

来源：

ACTA METALLURGICA SINICA | 2009年 / 45卷 / 01期

关键词：

weld metal; second phase; carbide; tempering; low alloy steel 2.25Cr-1Mo-0.25V; HEAT-AFFECTED ZONE; LOW-ALLOY STEELS; CR-MO-V; MECHANICAL-PROPERTIES; MICROSTRUCTURE; PRECIPITATION; EXPOSURE;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The evolution of the second phase in 2.25Cr-1Mo-0.25V steel weld metal during holding at 700 degrees C for a series of durations was studied by TEM and EDX. The precipitates in the as-welded specimen are M3C carbides, and during tempering M7C3 and M23C6 carbides appeared. After long term tempering M3C carbides spheroidized and disappeared. In the early tempering stage M7C3 carbide with low w(Cr)/w(Fe) is metastable phase. M23C6 carbide can exist only under low tempering parameter, and M7C3 carbide with high w(Cr)/w(Fe) formed in the late stage is the stable phase. M3C carbides are often sphere-liked, M7C3 and M23C6 carbides are rod-shaped and lump-shaped.

引用

页码：51 / 57

页数：7

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