Microstructural Modeling and Processing Optimization during Hot Strip Rolling of High-Nb Steels

被引：0

作者：

Xu, Yun Bo ^{[1
]}

Yu, Yong Mei ^{[2
]}

Xiao, Bao Liang ^{[1
]}

Wang, Guo Dong ^{[1
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling Technol & Automat, Shenyang, Peoples R China

[2] Shenyang Univ Chem Technol, Sch Mech Engn, Shenyang, Peoples R China

来源：

STEEL RESEARCH INTERNATIONAL | 2010年 / 81卷 / 09期

关键词：

High-Nb steel; Recrystallization; Precipitation; Microstructure Evolution; Modeling; DYNAMIC RECRYSTALLIZATION; CARBON-STEEL; FLOW-STRESS; INITIATION;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The microstructure modeling during thermo-mechanical processing of high-Nb HSLA steels has been developed to predict austenite recrystallization, grain size and precipitation. When rolled at higher temperatures with reasonable rolling schedule, high-Nb steels often display the typical behaviour of dynamic and metadynamic recrystallization (DRX+MRX) followed by strain accumulation again, which can not only intensely refine austenite grain size but also greatly increase the strain accumulation effect. The transformed microstructures in high-Nb steel, comprising fine acicular ferrite and quasi-polygonal ferrite in a relatively wide range of cooling rate, are markedly different in shape, morphology and volume fraction of each phase from those in low-Nb steel.

引用

页码：74 / 77

页数：4

共 15 条

[1]

Dutta B., 1987, MAT SCI TECHNOL, V22, P217

[2]

Hulka K., 2006, MICROALLOY TECHNOL, V6, P1

[3] Prediction of dynamic recrystallisation behaviour of AISI type 4140 medium carbon steel [J].

Kim, SI ;

Yoo, YC .

MATERIALS SCIENCE AND TECHNOLOGY, 2002, 18 (02) :160-164

[4] Initiation of dynamic recrystallization under inhomogeneous stress states in pure copper [J].

Manonukul, A ;

Dunne, FPE .

ACTA MATERIALIA, 1999, 47 (17) :4339-4354

[5] Microstructural model for hot strip rolling of high-strength low-alloy steels [J].

Militzer, M ;

Hawbolt, EB ;

Meadowcroft, TR .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2000, 31 (04) :1247-1259

[6] Mathematical modeling of mean flow stress during the hot strip rolling of Nb steers [J].

Minami, K ;

Siciliano, F ;

Maccagno, TM ;

Jonas, JJ .

ISIJ INTERNATIONAL, 1996, 36 (12) :1507-1515

[7] MODELING THE THERMOMECHANICAL AND MICROSTRUCTURAL EVOLUTION DURING ROLLING OF A NB HSLA STEEL [J].

PIETRZYK, M ;

ROUCOULES, C ;

HODGSON, PD .

ISIJ INTERNATIONAL, 1995, 35 (05) :531-541

[8] A one-parameter approach to determining the critical conditions for the initiation of dynamic recrystallization [J].

Poliak, EI ;

Jonas, JJ .

ACTA MATERIALIA, 1996, 44 (01) :127-136

[9]

ROUCOULES C, 1993, P INT C MOD MET ROLL, P165

[10] FLOW-STRESS, DYNAMIC RESTORATION, STRAIN-HARDENING AND DUCTILITY IN HOT-WORKING OF 316-STEEL [J].

RYAN, ND ;

MCQUEEN, HJ .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1990, 21 (02) :177-199

← 1 2 →