新型多尺度碳氮化物强化马氏体耐热钢的稳定性

doi:10.11896/j.issn.1005-023X.2018.20.020

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Abstract The microstructural model of a new type of multi-sized carbonitrides strengthened Martensitic heat-resistant steel model was proposed in this paper. Firstly, decrease the carbon content and remove Mo and B so as to attenuate the growth kinetics and retard the coarsening of M₂₃C₆ during aging, meanwhile minimize the coarsening rate of M₂X type of Laves phase and reduce the fragile borides in the matrix. Then, adjust the deformation temperature, the deformation rate, the stress relaxation time and optimize the heat treatment procedure to finally obtain the multi-sized carbonitrides which consist of various forms of M₂₃C₆ and MX phases with the size ranging within 0—50 nm and 100—200 nm. By using the designed model, we successfully developed the novel carbonitride-strengthened heat-resistant steel, which showed excellent primary strength and high temperature microstructure stability. The small sized precipitates (below 50 nm) were designed to strongly strengthen the matrix by cumbering the movement of dislocations during creep, while the 100—200 nm particles mainly contribute to the formation of sub-grain boundaries and the stability of the lath boundaries and the prior austenite boundaries. With the help of these two types of carbonitrides, the sub-grain boundaries barely changed during aging at 650 ℃ for 1 000 h. However, the hardness decreased slowly as the time extended, as compared with the steel produced by the traditional procedure.

Key words： multi-sized carbonitrides strengthening microstructure stability martensitic heat-resistant steel growth kine-tics coarsening rate

Published: 22 November 2018

CLC number:

TG142

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	Articles by authors
	ZHANG Wenfeng
	ZOU Aicheng
	LIU Yunqiang
	YE Dong
	LIU Xiaogang
	YAN Wei

Cite this article:

ZHANG Wenfeng,ZOU Aicheng,LIU Yunqiang, et al. A Newly Developed Martensitic Heat-resistant Steel Strengthened by Multi-sized Carbonitrides[J]. Materials Reports, 2018, 32(20): 3606-3611.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.20.020 OR http://www.mater-rep.com/EN/Y2018/V32/I20/3606

1 Kimura K, Toda Y, Kushima H, et al. Creep strength of high chromium steel with ferrite matrix [J]. International Journal of Pressure Vessels and Piping,2010,87:282.
2 Hagen I V, Bendick W.The plastic of metallic material, physical society[M].Duisburg, Germany: Duisburg-Essen University Press,2010.
3 Palaparti D P R, Samuel E I, Choudhary B K, et al. Creep properties of grade 91 steel steam generator tube at 923K [J]. Procedia Engineering,2013,55:70.
4 张文凤,李晓理,严伟,等.一种获得多尺度氮化物强化马氏体耐热钢的工艺:中国201310036788.7[P].2013-01-22.
5 Kimura K, Kushima H, Abe F, et al. Inherent creep strength and long term creep strength properties of ferritic steels [J]. Materials Science and Engineering A,1997,234-236:1079.
6 Toda Y, Seki K, Kimura K, et al. Effects of W and Co on long-term creep strength of precipitation strengthened 15Cr ferritic heat resis-tant steels [J]. ISIJ International,2003,43:112.
7 Yan W, Wang W, Shan Y Y, et al. Microstructural stability of 9-12%Cr ferrite/martensite heat-resistant steels [J]. Frontiers of Materials Science,2013,7:1.
8 Milovic′ L, Vuherer T, Blaic′ I, et al. Microstructures and mechanical properties of creep resistant steel for application at elevated temperatures [J]. Materials & Design,2013,46:660.
9 Zhang Wenfeng,Su Qingyong, Wei Yan, et al. Precipitation beha-vior in anitride-strengthened martensitic heat resistant steel during hot deformation [J]. Materials Science&Engineering A,2015,639:173.
10 Zhang Wenfeng, Su Qingyong, Xua Mi, et al. Precipitation behavior in a nitride-strengthened martensitic heat resistant steel during hot deformation [J]. Data in Brief,2015,4:395.
11 Zhang Wenfeng.Study on martensitic heat-resistant steels containing multi-sized carbonitrides[D]. Hefei:University of Science and Technology of China,2014.
张文凤.多尺度碳氮化物强化马氏体耐热钢[D].合肥:中国科学技术大学,2014.
12 Nagode A, Kosec L, Ulet B, et al. Review of creep resistant [J]. Metabk,2011,50:45.
13 张俊善.材料的高温变形与断裂[M].北京:科学出版社,2007.
14 Kostka A, Tak K, Hellmig R, et al. On the contribution of carbides and micrograin boundaries to the creep strength of tempered martensite ferritic steels [J]. Acta Materialia,2007,55:539.
15 Zhang W F, Hu Q P, Zhou G, et al. Effect of heat treatment on the mechanical properties and the carbide characteristics of a high strength low alloy steel[J]. Journals of Iron Steel Research International,2011,18:143.
16 Zhang W F, Yan W, Sha W, et al. The impact toughness of a nitride-strengthened martensitic heat resistant steel [J]. Science China Technological Sciences,2012,55:1858.17 Park J S, Ha Y S, Lee S J, et al. Dissolution and precipitation kinetics of Nb(C,N) in austenite of a low-carbon Nb-microalloyed steel[J]. Metallurgical and Materials Transactions A,2009,40:560.
18 Fujio Abe, Tabuchi M, Tsukamoto S, et al. Suppression of type Ⅳ fracture in welds of 9Cr-boron steel for A-USC boilers[C]∥The 5th Symposium on Heat Resistant Steels and Alloys for High Efficiency USC/A-USC Power Plants.Seoul, Korea,2013.
19 Zhang W F, Li X L, Sha W, et al. Hot deformation characteristics of a nitride strengthened martensitic heat resistant steel [J]. Mate-rials Science and Engineering A,2014,590:199.
20 Zhang W F, Sha W, Yan W, et al. Constitutive modeling, microstructure evolution and processing map for a nitride strengthened heat resistant steel [J]. Journal of Materials Engineering and Performance,2014,23(8):3042.
21 Zhang W F, Sha W, Yan W, et al. Analysis of deformation beha-vior and workability of advanced 9Cr-Nb-V ferritic heat resistant steels [J]. Materials Science and Engineering A,2014,604:207.