Effect of Nb on Microstructure Evolution in Cold Rolled Dual-Phase Steels:Interaction of Recovery,Recrystallization and Phase Transformations

被引：0

作者：

Pottore N ^{[1
]}

Fonstein N ^{[1
]}

Bhatta Charya D ^{[1
]}

Jansto S ^{[2
]}

机构：

[1] ArcelorMittal Global R and D,3001 E Columbus Dr,East Chicago,IN 46312,USA

[2] CBMM-Reference Metals Company,1000 Old Pond Road,Bridgeville,PA 15017,USA

来源：

Journal of Iron and Steel Research(International) | 2011年 / 18卷 / S1期

关键词：

niobium; dual-phase steel; recovery; recrystallization; phase transformation;

D O I：

10.13228/j.boyuan.issn1006-706x.2011.s1.054

中图分类号：

TG331 [轧制理论];

学科分类号：

080201 ; 080503 ;

摘要：

The effects of Nb addition,individually and in combination with Ti,were evaluated over a range of coiling temperatures.Coiling temperature influences the ratio of soluble and precipitated Nb in the hot rolled steel containing 0.08 % C and 2.2 % Mn.Nb bearing precipitates can co-precipitate on TiN and impact the microstructure and mechanical properties of the steel after annealing treatment.Microstructure characterization revealed that recovery and recrystallization processes preceded austenite formation.The effects of Nb on austenite formation in cold rolled steels during heating and isothermal holding and on austenite decomposition during subsequent cooling were investigated using dilatometry.The addition of Nb retarded ferrite recrystallization starting temperature,but had no significant effect on the starting temperature of austenite formation during heating.The Nb addition also accelerated austenite formation once the transformation started,and was beneficial for the formation of a finer and homogeneous microstructure.

引用

页码：228 / 232

页数：5

共 6 条

[1]

Interactions between Recrystallisation and Phase Transformations during Annealing of Cold Rolled Nb-Added TRIP-Aided Steels[J] . Andrade-Carozzo V.,Jacques Pascal J..Materials Science Forum . 2007 (539)

[2]

Microalloying of Cold-Formable Multi Phase Steel Grades[J] . Bleck Wolfgang,Phiu-On Kriangyut.Materials Science Forum . 2005 (500)

[3]

New Microalloyed Steel Applications for the Automotive Sector[J] . Matlock David K.,Krauss George,Speer John G..Materials Science Forum . 2005 (500)

[4]

The Role of Niobium in Cold Rolled TRIP Steel[J] . Hulka Klaus.Materials Science Forum . 2005 (473)

[5] Austenite formation during intercritical annealing [J].

Huang, J ;

Poole, WJ ;

Militzer, M .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (11) :3363-3375

[6] Modeling recovery and recrystallization kinetics in cold-rolled Ti-Nb stabilized interstitial-free steel [J].

Mukunthan, K ;

Hawbolt, EB .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (11) :3410-3423

← 1 →