|
|
EFFECTS OF AGING TEMPERATURE ON PRECIPITATION PHASE OF A CAST SUPER DUPLEX\par STAINLESS STEEL |
XIANG Hongliang; HE Fushan; LIU Dong |
School of Mechanical Engineering and Automation of Fuzhou University; Fuzhou 350108 |
|
Cite this article:
XIANG Hongliang HE Fushan LIU Dong. EFFECTS OF AGING TEMPERATURE ON PRECIPITATION PHASE OF A CAST SUPER DUPLEX\par STAINLESS STEEL. Acta Metall Sin, 2009, 45(12): 1456-1460.
|
Abstract Super duplex stainless steels have been extensively used in many applications owing to their excellent mechanical properties and corrosion resistance. But subjected to “aging” treatments at temperatures of 600 to 1000℃, duplex stainless steels will precipitate a certain amount of intermetallic phases such as σ phase, χ phase and chromium nitride, etc., which decrease mechanical properties and corrosion resistance of these steels. In this paper, the effects of aging treatments on the type, size and quantity of precipitation particles of a cast super duplex stainless steel after solution treatment were studied by means of OM, SEM, XRD and TEM. The results indicate that the soloution annealing cast super duplex stainless steel is aged in temperatures ranging from 650 to 950℃, no phase transformation occurs in the original austenite but the intermetallic phases are precipitated in ferrite and at ferrite/austenite interfaces. The precipitated intermetallic phases are mainly χ phases during aging at 650℃. They are σ and χ phases at aging temperature of 750℃. When temperature increased to 850℃, the intermetallic phase is only σ phase. At
temperature of 950℃, there is a little σ phase precipitated at ferrite/austenite interfaces. The formation of intermetallic phases is analyzed by thermodynamics, which shows that metastable χ phase can invert to σ phase at aging temperatures from 650 to 750℃. When temperature ranging from 850 to 950℃, σ phase can be directly precipitated.
|
Received: 09 June 2009
|
|
Fund: Supported by Program for Service of Enterprise by Technical Personnel, The Ministry of Science and Technology of PRC (2009GJC40018), Innovation Foundation for Young Talent of Fujian (No.2008F3061) and Technological Development Foundation of Fuzhou University (No.2008–XQ–16) |
[1] Wu J. Duplex stainless steel. Beijing: Metallurgy Industry Press, 1999: 1
(吴 玖. 双相不锈钢. 北京: 冶金工业出版社, 1999: 1)
[2] Sun W . Ord Mater Sci Eng, 2001; 24: 49
(孙文山. 兵器材料科学与工程. 2001; 24: 49)
[3] Wang J Y. Petrochem Des, 2006; 23: 40
(汪建羽. 石油化工设计. 2006; 23: 40)
[4] Jan O, Malin S. Desalination, 2007; 205: 104
[5] Ezuber H M, El–Houd A, El–Shawesh F. Desalination, 2007; 207: 268
[6] Maehara Y, Masao K, Fujino N. J ISIJ, 1983; 63: 577
[7] Long J M, Fan A M. Phys Test, 1997; 15(1): 1
(龙晋明, 樊爱民. 物理测试. 1997; 15(1): 1)
[8] Otarola T, Hollnr S, Bonnefois B. ng Fail Anal, 2005; 12: 930
[9] Huang C, Shih C. Mater Sci Eng, 2005; A402: 66
[10] Russell SW, Lundin C D. Final Report for the Department of Energy: the Development of Qualification Standards for Cast Duplex Stainless Steel the University of Tennessee, Knoxville, 2005, 2: 8
[11] Chen J Y, Yang Z Y, Yang W, Su J, Luo F H. J Iron Steel Res, 2006; 18: 2
(陈嘉砚, 杨卓越, 杨 武, 苏 杰, 罗丰华. 钢铁研究学报. 2006; 18: 2)
[12] Mao P L, Su G Y, Yang K. J Shenyang Univ Technol, 2003; 25: 193
(毛萍莉, 苏国跃, 杨柯. 沈阳工业大学学报. 2003; 25: 193)
[13] Wang S H, Chiu P K, Yang J R. Mater Sci Eng, 2006; A420: 27
[14] Pohl M, Storz O, Glogowski T. Mater Charact, 2007; 58: 66
[15] Redja A, Proult A, Donnadieu P, Morniroli J. J Mater Sci, 2004; 39: 2386
[16] Calliari I, Zanesco M, Ramous E. J Mater Eng Perform, 2007; 16: 112
[17] Sieurin H, Sandstrom R. Mater Sci Eng, 2007; A444: 271
[18] Jang Y, Son J, Kim S. Metall Mater Trans, 2004; 35A: 3432
[19] Jang Y, Kim S, Lee J. Metall Mater Trans, 2005; 36A: 1229
[20] Kim Y J, Ugurlu O, Jiang C. Metall Mater Trans, 2007; 38A: 203 |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|