Study on the Microstructure Evolution and Tungsten Content Optimization of 9Cr-3W-3Co Steel

被引：6

作者：

Ma, Longteng ^{[1
]}

Wang, Yanfeng ^{[1
]}

Di, Guobiao ^{[1
]}

机构：

[1] Shougang Res Inst Technol, Beijing 100043, Peoples R China

来源：

MATERIALS | 2018年 / 11卷 / 11期

关键词：

tungsten; creep rupture life; lath substructure recovery; precipitation coarsening; CREEP DEFORMATION-BEHAVIOR; LAVES PHASE; HIGH-TEMPERATURE; STRENGTH; PRECIPITATION; DESIGN;

D O I：

10.3390/ma11112080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Creep rupture tests of 9Cr-3W-3Co steel were conducted in the range of 120 to 200 MPa at 650 degrees C. The influence of stress on microstructure evolution was investigated in detail. In the high stress regime, a large density of dislocation was generated and induced precipitation of fine and dispersive particles. However, at lower stresses, a transformation from martensite laths to large size subgrains and a coarsening of precipitates took place due to significant recovery and loss of pinning effect during long term exposure. Thermodynamic results revealed decreasing tungsten content effectively retarded the coarsening behavior of M23C6 and Laves phase, hence further improvement of creep rupture time was achieved experimentally.

引用

页数：14

共 28 条

[1] Effect of fine precipitation and subsequent coarsening of Fe2W laves phase on the creep deformation Behavior of tempered martensitic 9Cr-W steels [J].

Abe, F .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (02) :321-332

[2] Effect of quenching, tempering, and cold rolling on creep deformation behavior of a tempered martensitic 9Cr-1W steel [J].

Abe, F .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34A (04) :913-925

[3]

Abe F., 2014, ENERGY MAT, V2014, P129, DOI [10.1007/978-3-319-48765-6_13, DOI 10.1007/978-3-319-48765-6_13]

[4] Alloy Design of Creep- and Oxidation-resistant 9%Cr Steel for High Efficiency USC Power Plant [J].

Abe, Fujio .

THERMEC 2011, PTS 1-4, 2012, 706-709 :3-8

[5] The effect of strain distribution on microstructural developments during forging in a newly developed nickel base superalloy [J].

Buckingham, R. C. ;

Argyrakis, C. ;

Hardy, M. C. ;

Birosca, S. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 654 :317-328

[6] Creep behavior and microstructure of a 9Cr-3Co-3W martensitic steel [J].

Fedoseeva, A. ;

Dudova, N. ;

Kaibyshev, R. .

JOURNAL OF MATERIALS SCIENCE, 2017, 52 (05) :2974-2988

[7] Degradation of microstructure and mechanical properties in martensitic cast steel after ageing [J].

Golanski, G. ;

Zielinski, A. ;

Zielinska-Lipiec, A. .

MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK, 2015, 46 (03) :248-255

[8] Microstructure and long-term creep properties of 9-12% Cr steels [J].

Hald, J. .

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2008, 85 (1-2) :30-37

[9] PRECIPITATION BEHAVIOR OF LAVES PHASE AND ITS EFFECT ON TOUGHNESS OF 9CR-2MO FERRITIC MARTENSITIC STEEL [J].

HOSOI, Y ;

WADE, N ;

KUNIMITSU, S ;

URITA, T .

JOURNAL OF NUCLEAR MATERIALS, 1986, 141 :461-467

[10] EFFECTS OF SILICON AND MOLYBDENUM ON LONG-TERM HEATING EMBRITTLEMENT AND PRECIPITATION OF LAVES PHASE OF HIGH CHROMIUM FERRITIC HEAT-RESISTANT STEELS [J].

ISEDA, A ;

TERANISHI, H ;

YOSHIKAWA, K .

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1990, 76 (12) :2190-2197

← 1 2 3 →