|
|
Relationship Between Retained Austenite Stability and Cryogenic Impact Toughness in 0.12C-3.0Mn Low Carbon Medium Manganese Steel |
Long HUANG,Xiangtao DENG(),Jia LIU,Zhaodong WANG |
State Key Laboratory of Rolling Technology and Automation, Northeastern University, Shenyang 110819, China |
|
Cite this article:
Long HUANG,Xiangtao DENG,Jia LIU,Zhaodong WANG. Relationship Between Retained Austenite Stability and Cryogenic Impact Toughness in 0.12C-3.0Mn Low Carbon Medium Manganese Steel. Acta Metall Sin, 2017, 53(3): 316-324.
|
Abstract Low carbon and low alloy steels require good combination of strength and ductility to ensure safety and stability of structures, and the low temperature toughness has become more significant to low carbon low alloyed high performance steel recently. Retained austenite plays a great role in a multiphase system to improve the toughness of steel as a result of the deformation induced transformation of retained austenite when the steel deformed. In this work, the characterization of multiphase microstructure including retained austenite, tempered martensite and intercritical ferrite which obtained by a three-step intercritical heat treatment in a low carbon medium manganese steel were studied, and the low-temperature impact toughness evolution from -40~-196 ℃ during the process were analyzed. The results showed that C and Mn distributed unevenly after intercritical quenching and were benefit to martensite inverse transformation to austenite, and the enriched C and Mn elements can improve the stability of reverted austenite during the tempering process. The impact energy of the steel is 200 J at -80 ℃ during the processes at intercritical quenching temperature 720 ℃ and tempering temperature 640 ℃, and the energy of impact crack formation and propagation at different temperature were also analyzed.
|
Received: 17 August 2016
|
Fund: Supported by National Natural Science Foundation of China (Nos.51234002, 51504064 and 51474064) and National Basic Research Program of China (No.2016YFB0300601) |
[1] | Wang C J, Liang J X, Liu Z B, et al.Effect of metastable austenite on mechanical property and mechanism in cryogenic steel applied and oceaneering[J]. Acta Metall. Sin., 2016, 52: 385 | [1] | (王长军, 梁剑雄, 刘振宝等. 亚稳奥氏体对低温海工用钢力学性能的影响与机理[J]. 金属学报, 2016, 52: 385) | [2] | Zhang K, Tang D, Wu H B.Effect of heating rate before tempering on reversed austenite in Fe-9Ni-C alloy[J]. J. Iron Steel Res. Int., 2012, 19: 73 | [3] | Gao G H, Zhang H, Gui X L, et al.Enhanced ductility and toughness in an ultrahigh-strength Mn-Si-Cr-C steel: The great potential of ultrafine filmy retained austenite[J]. Acta Mater., 2014, 76: 425 | [4] | Chen J, Lv M Y, Tang S, et al.Correlation between mechanical properties and retained austenite characteristics in a low-carbon medium manganese alloyed steel plate[J]. Mater. Charact., 2015, 106: 108 | [5] | Chen J, Lv M Y, Liu Z Y, et al.Combination of ductility and toughness by the design of fine ferrite/tempered martensite-austenite microstructure in a low carbon medium manganese alloyed steel plate[J]. Mater. Sci. Eng., 2015, A648: 51 | [6] | Xie Z J, Yuan S F, Zhou W H, et al.Stabilization of retained austenite by the two-step intercritical heat treatment and its effect on the toughness of a low alloyed steel[J]. Mater. Des., 2014, 59: 193 | [7] | Hoshino M, Saitoh N, Muraoka H, et al.Development of super-9% Ni steel plates with superior low-temperature toughness for LNG storage tanks[J]. Nippon Steel Technical Report, 2004, 90 | [7] | (星野学, 斎藤直樹, 村岡寛英等. LNGタンク用高靭性スーパー9%Ni鋼の開発[J]. 新日鉄技報, 2004, 90) | [8] | Niikura M, Morris J W.Thermal processing of ferritic 5Mn steel for toughness at cryogenic temperatures[J]. Metall. Trans., 1980, 11A: 1531 | [9] | Kim J I, Syn C K, Morris J W.Microstructural sources of toughness in QLT-treated 5.5Ni cryogenic steel[J]. Metall. Trans., 1983, 14A: 93 | [10] | Speer J G, Edmonds D V, Rizzo F C, et al.Partitioning of carbon from supersaturated plates of ferrite, with application to steel processing and fundamentals of the bainite transformation[J]. Curr. Opin. Solid St. M., 2004, 8: 219 | [11] | Clarke A J, Speer J G, Miller M K, et al.Carbon partitioning to austenite from martensite or bainite during the quench and partition (Q&P) process: a critical assessment[J]. Acta Mater., 2008, 56: 16 | [12] | Wu R M, Li W, Zhou S, et al.Effect of retained austenite on the fracture toughness of quenching and partitioning (Q&P)-treated sheet steels[J]. Metall. Mater. Trans., 2014, 45A: 1892 | [13] | Xu Z Y.New processes for steel heat treatment[J]. Heat Treat., 2007, 22(1): 1 | [13] | (徐祖耀. 钢热处理的新工艺[J]. 热处理, 2007, 22(1): 1) | [14] | Xu Z Y.A brief introduction to quenching-partitioning-tempering (Q-P-T) process[J]. Heat Treat. Met., 2009, 34(6): 1 | [14] | (徐祖耀. 淬火-碳分配-回火, 2009, 34(6): 1) | [15] | Zhou W H, Guo H, Xie Z J, et al.High strength low-carbon alloyed steel with good ductility by combining the retained austenite and nano-sized precipitates[J]. Mater. Sci. Eng., 2013, A587: 365 | [16] | Zhou W H, Wang X L, Venkatsurya P K C, et al. Structure-mechanical property relationship in a high strength low carbon alloy steel processed by two-step intercritical annealing and intercritical tempering[J]. Mater. Sci. Eng., 2014, A607: 569 | [17] | Zhou W H, Xie Z J, Guo H, et al.Regulation of multi-phase microstructure and mechanical properties in a 700 MPa grade low carbon low alloy steel with good ductility[J]. Acta Metall. Sin., 2015, 51: 407 | [17] | (周文浩, 谢振家, 郭晖等. 700 MPa级高塑低碳低合金钢的多相组织调控及性能[J]. 金属学报, 2015, 51: 407) | [18] | Xie Z J, Han G, Zhou W H, et al.Study of retained austenite and nano-scale precipitation and their effects on properties of a low alloyed multi-phase steel by the two-step intercritical treatment[J]. Mater. Charact., 2016, 113: 60 | [19] | Hu J, Du L X, Sun G S, et al.The determining role of reversed austenite in enhancing toughness of a novel ultra-low carbon medium manganese high strength steel[J]. Scr. Mater., 2015, 104: 87 | [20] | Cai Z H, Ding H, Misra R D K, et al. Austenite stability and deformation behavior in a cold-rolled transformation-induced plasticity steel with medium manganese content[J]. Acta Mater., 2015, 84: 229 | [21] | Zhang S, Findley K O.Quantitative assessment of the effects of microstructure on the stability of retained austenite in TRIP steels[J]. Acta Mater., 2013, 61: 1895 | [22] | Zhou Q, Qian L H, Tan J, et al.Inconsistent effects of mechanical stability of retained austenite on ductility and toughness of transformation-induced plasticity steels[J]. Mater. Sci. Eng., 2013, A578: 370 | [23] | Fultz B, Kim J I, Kim Y H, et al.The stability of precipitated austenite and the toughness of 9Ni steel[J]. Metall. Trans., 1985, 16A: 2237 | [24] | Yuan L, Ponge D, Wittig J, et al.Nanoscale austenite reversion through partitioning, segregation and kinetic freezing: Example of a ductile 2 GPa Fe-Cr-C steel[J]. Acta Mater., 2012, 60: 2790 | [25] | Tan X D, Xu Y B, Yang X L, et al.Microstructure-properties relationship in a one-step quenched and partitioned steel[J]. Mater. Sci. Eng., 2014, A589: 101 | [26] | Santofimia M J, Nguyen-Minh T, Zhao L, et al.New low carbon Q&P steels containing film-like intercritical ferrite[J]. Mater. Sci. Eng., 2010, A527: 6429 | [27] | Yen H W, Ooi S W, Eizadjou M, et al.Role of stress-assisted martensite in the design of strong ultrafine-grained duplex steels[J]. Acta Mater., 2015, 82: 100 |
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|