Improvement of High-Temperature Mechanical Properties of Low-Carbon RAFM Steel by MX Precipitates

被引：40

作者：

Chen, Jianguo ^{[1
]}

Liu, Yongchang ^{[1
]}

Xiao, Yantong ^{[2
]}

Liu, Yihuan ^{[2
]}

Liu, Chenxi ^{[1
]}

Li, Huijun ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300350, Peoples R China

[2] Tianjin Special Equipment Inspect Inst, Tianjin 300192, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2018年 / 31卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Low-carbon RAFM steels; Tantalum addition; Precipitates; High-temperature mechanical properties; RESISTANT STEELS; TANTALUM CONTENT; CREEP-PROPERTIES; HEAT-TREATMENT; CLAM STEEL; BEHAVIOR; MICROSTRUCTURE; FUSION; PHASES;

D O I：

10.1007/s40195-018-0703-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To investigate the influence of tantalum content on high-temperature mechanical properties of low-carbon reduced activation ferritic/martensitic (RAFM) steels, RAFM steels containing different tantalum contents (0 and 0.073%) were fabricated, and the tensile tests at room temperature and high temperature were performed, as well as the creep tests were conducted at 550 degrees C with the applied stress of 180 and 220 MPa. It was found that 0.073% tantalum addition results in the increase in amount of stable carbonitrides (MX), and the creep rupture time of the steel under 180 MPa is obviously increased. In addition, the increase in MX caused by tantalum addition also leads to the improvement of high-temperature tensile strength. The improvement of high-temperature mechanical properties of RAFM steels is primarily related to the evolution of precipitates.

引用

页码：706 / 712

页数：7

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