退火温度对441铁素体不锈钢组织性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20200210

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (3990 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract To explore the microstructure evolution and mechanical properties of 441 ultra-purified ferritic stainless steel during annealing,441 hot-rolled plates were annealled at 900-1 050 ℃,and the microstructure were characterized by OM,SEM and TEM. The effects of annealing temperature on mechanical properties were studied by tensile test and impact test. The results show that the rolling structure recrystallizes and the grains grow gradually with increasing annealing temperature. There are three precipitates in 441 hot-rolled-annealed plate,primary (Ti,Nb)(C,N),secondary Nb(C,N) and Laves phase. A large number of Laves phase,with the size of hundreds nanometers,precipitates in samples annealed at 900-950 ℃. As the annealing temperature increases,the yield strength of 441 firstly decreases and then increases,the tensile strength decreases gradually,while the elongation increases continually. Deformation strengthening has the greatest contribution to the yield strength,followed by solution strengthening and precipitation strengthening. The impact test indicates that 441 plate has the lowest ductile to brittle transition temperature after annealing at 1 000 ℃,and Laves phase and grain growth are detrimental to the impact toughness of this material.

Key words： ultra-purified ferritic stainless steel annealing temperature Laves phase grain size ductile to brittle transition temperature(DBTT)

Received: 20 April 2020

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WU Min
	LI Guo-ping
	ZOU Yong
	WANG Li-xin
	WEI Ying-hui

Cite this article:

WU Min,LI Guo-ping,ZOU Yong等. Effect of annealing temperature on microstructure and properties of ferritic stainless steel 441[J]. Iron and Steel, 2021, 56(1): 97-103.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200210 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I1/97

[1] 康喜范. 铁素体不锈钢[M]. 北京:冶金工业出版社,2012.(KANG Xi-fan. Ferritic Stainless Steel[M]. Beijing:Metallurgical Industry Press,2012.)
[2] Sello M P,Stumpf W E. Laves phase precipitation and its transformation kinetics in the ferritic stainless steel type AISI 441[J]. Materials Science and Engineering A,2011,528(3):1840.
[3] Juuti T,Rovatti L,Porter D,et al. Factors controlling ambient and high temperature yield strength of ferritic stainless steel susceptible to intermetallic phase formation[J]. Materials Science and Engineering A,2018,726:45.
[4] 陈安忠,任娟红,王军伟,等. 高温时效对铁素体不锈钢组织和性能的影响[J]. 中国冶金,2018,28(11):30. (CHEN An-zhong,REN Hong-juan,WANG Jun-wei, et al. Effect of high temperature aging on microstructure and properties of ferritic stainless steel[J]. China Metallurgy,2018,28(11):30.)
[5] Labonne M,Graux A,Cazottes S,et al. Precipitation kinetics in a nb-stabilized ferritic stainless steel[J]. Metallurgical and Materials Transactions A,2017,48(8):3655.
[6] Ikeda K I,Yamoah N K G,Reynolds W T,et al. Effect of laves phase on high-temperature deformation and microstructure evolution in an 18Cr-2Mo-0.5 Nb ferritic stainless steel[J]. Metallurgical and Materials Transactions A,2015(46):3460.
[7] Han J,Li H,Barbaro F. Precipitation and impact toughness of Nb-V stabilised18Cr-2Mo ferritic stainless steel during isothermal aging[J]. Materials Science and Engineering A,2014,612:63.
[8] 张晶晶. 时效温度对SUS444 超纯铁素体不锈钢冲击韧性的影响[J]. 材料热处理学报,2020,41(2):87.(ZHANG Jing-jing. Effect of aging temperature on impact toughness of SUS444 ultra-pure ferritic stainless steel[J]. Transactions of Materials and Heat Treatment,2020,41(2):87.)
[9] Kato Y,Ito M,Kato Y,et al. Effect of Si on precipitation behavior of Nb-laves phase and amount of Nb in solid solution at elevated temperature in high purity 17%Cr-0.5%Nb steels[J]. Materials Transactions,2010,51(9):1531.
[10] 束德林. 工程材料力学性能[M]. 2版. 北京:机械工业出版社,2008.(SHU De-lin. Mechanical Properties of Engineering Materials[M]. 2nd edition. Beijing:Mechanical Industry Press,2008.)
[11] Lu Q,Xu W,S van ver Zwaag S. Designing new corrosion resistant ferritic heat resistant steel based on optimal solid solution strengthening and minimisation of undesirable microstructural components[J]. Computational Materials Science,2014,84:198.
[12] Gladman T. The Physical Metallurgy of Microalloyed Steels[M]. London:Ashgate Publishing,1997.
[13] Yamamoto K,Kimura Y,Wei F G,et al. Design of Laves phase strengthened ferritic heat resisting steels in the Fe-Cr-Nb(-Ni) system[J]. Materials Science and Engineering A,2002,329:249.
[14] Miyazaki A,Takao K,Furukimi O. Effect of Nb on the proof strength of ferritic stainless steels at elevated temperatures[J]. ISIJ International,2002,42(8):916.
[15] Sim G M,Ahn J C,Hong S C,et al. Effect of Nb precipitate coarsening on the high temperature strength in Nb containing ferritic stainless steels[J]. Materials Science and Engineering A,2005,396:159.
[16] Van Zwieten A C T M,Bulloch J H. Some considerations on the toughness properties of ferritic stainless steels—A brief review[J]. International Journal of Pressure Vessels and Piping,1993,56(1):1.