Discussion Session

Program of the 153rd ISIJ Meeting (March 27-29, 2007)
Discussion Session Only

High Temperature Processes

Lecture No.

Title

Speaker

Page

New developments on the sintering process by designing of composite granulation & bed structure


D1	Development of production process of pre-reduced agglomerates using sinter bed	H.Sato
··· 2
D2	Granule design for the sintering with less amount of liquid phase formation	T.Otomo	··· 5
D3	Viscosity measurements of calcium ferrite melts and evaluations of penetration behavior into sintered hematite	S.Yoshimura	··· 9

D4	Organization structure and reduction behavior of composite iron ore sinter	H.Ono-Nakazato	··· 13
D5	Structure of the SFCA-I phase and its behavior under reducing condition	K.Sugiyama	··· 17

D6	Numerical simulation of the mosaic embedding iron ore sintering (MEBIOS) process	N.Hayashi	··· 21

D7	Measurement for thermal diffusivity of iron ore compact during sintering process	H.Shibata	··· 25

D8	Numerical simulation of air and particle motions and agglomeration processes in sintering beds	T.Umekage	··· 28

D9	Effect of moisture-retention capacity and Stokes deformation number on optimum iron ore pelletization	I.Sekiguchi	··· 32
D10	Relationship between particle size and strength of granulated particle for iron ore sinter	T.Maeda
··· 36
D11	Computer simulation of granulation of iron ores and factors correlating to granulation phenomena	J.Kano
··· 40

Social Engineering on Iron and Steel Industry

Lecture No.

Title

Speaker

Page

Sustainable use of iron scraps in Japan and Asian countries and development of methodologies
for assessing the reduction potential of environmental impactsII


D12	Global circulation of the ferrous materials and the use of steel scrap (Details of steel production and the composition of ferrous raw materials-1)	S.Hayashi	··· 204

D13	Estimation of steel scrap flow in Japan and Asian countries in the future	Y.Igarashi	··· 206
D14	Relationship between collection rate of steel scraps and its market	I.Daigo	··· 209

D15	Development of dynamic waste input output model considering contamination of tramp elements	K.Yokoyama	··· 211

D16	Estimation of tramp elements amount in the accumulative quantity of iron and steel	W.Tamaki	··· 215

D17	Resource productivity and recycling	K.Halada	··· 216

Instrumentation, Control and System Engineering

Lecture No.

Title

Speaker

Page

Proposal from the system field to the technical skill succession and personnel training
in the steel industry


D18	Acquisition and inherit of technological knowledge in chemical industry	M.Konishi	··· 278

D19	Collaborative skill succession support systems allowing users' proactive generation of meanings	T.Sawaragi	··· 282

D20	Construction of OJT support system and trial toward analysis of work knowledge	T.Tateno	··· 286

D21	An efficient method of patent information retrieval using text mining	K.Tsuda	··· 288

D22	(Invited Lecture)Understanding and acquisition of human skills :Embedded rule observation and slump inducing	H.Mochiyama	··· 290

Processing for Quality Products

Lecture No. Title Speaker   Page

Recent welding technology applied for pipes and other use

D23 (Keynote Lecture)Welding of gas and oil transport linepipes
Y.Komizo ···  308

D24 Welding of austenitic heat resistant steel for boiler tube
H.Morimoto ···  312

D25 Electro magnetic and heat conductive FE analysis on high frequency tube welding process
T.Okabe ···  316

D26 (Invited Lecture)Butt-welding of layered sheets by pulsed TIG welding
and trial fabrication of a double-walled pipe
Y.Kasuga ···  319

D27 (Invited Lecture)Application of friction stir welding into steels
T.Shinoda ···  323

Microstructure and Properties of Materials

Lecture No. Title Speaker   Page

Fundamentals of martensite and bainite toward future steels with high performance

D28 Examples and unresolved issues in applications of bainitic microstructures
to high strength steel sheets for auto-bodies
M.Takahashi ···  368

D29 Key to improve fatigue resistance in high strength martensitic steels
H.Yaguchi ···  372

D30 Recent utilization examples of steels with bainitic microstructure for welded structures and a proposal
for future works on their microstructural controls
S.Endo ···  376

D31 Improvement of strength and toughness by ausforming and it's productive problems
H.Yoshida ···  380

D32 Materials science and technology on matrensitic steels for advanced USC power plants
M.Igarashi ···  384

D33 Crystallographical analysis of lath martensite morphology in the ultra-low carbon steels
S.Morito ···  388

D34 Controlling factors of grain sizes in martensite and bainite structures
T.Furuhara ···  392

D35 A new approach for interpretation of strengthening mechanism of martensitic steel through characterization
of local deformation behavior
T.Ohmura ···  396

D36 Contribution of mobile dislocations to yielding behavior of martensitic steel
K.Nakashima ···  400

D37 Work hardening mechanism studied by in situ neutron diffraction during tensile deformation
S.Morooka ···  404

D38 Effects of a high magnetic field on martensitic and bainitic transformations in Fe-based alloys
H.Ohtsuka ···  408

D39 Bainite transformation behavior from γ+α' structure
H.Kawata ···  411

New aspects of steels disclosed by severe plastic deformation

D40 Grain refinement using severe plastic deformation mechanism and limitation
Z.Horita ···  414

D41 Possibility to manage both high strength and high ductility-toughness in nanostructured metals fabricated
by severe plastic deformation
N.Tsuji ···  418

D42 Ultrafine grained structure formation on the high speed machined surface in carbon steels
M.Umemoto ···  420

D43 Nanocrystallization by rolling contact fatigue
K.Hiraoka ···  424

Process Evaluation and Material Characterization

Lecture No. Title Speaker   Page

Progress in evaluation of inclusion particles in steel

D44 Characterization and analysis of inclusion and precipitate in steels
T.Takayama ···  562

D45 New development method for inclusion and precipitates analysis
A.Chino ···  566

D46 Electrolytic extraction method for evaluation of size distribution of inclusion particles in steel
R.Inoue ···  568

D47 Analysis of inclusions in steel by helium microwave induced plasma atomic emission spectrometry
T.Aiura ···  572

D48 Determination of inclusion elements in steels by microwave-induced atmospheric-pressure helium plasma spectrometry
H.Iwata ···  573

D49 (Invited Lecture)Hierarchical characterization of inclusions and precipitates in steel
S.Suzuki ···  574

D50 (Invited Lecture)Microstructure control of steels using inclusions -Current understandings and future directions
T.Koseki ···  576


D23	(Keynote Lecture)Welding of gas and oil transport linepipes	Y.Komizo	··· 308

D24	Welding of austenitic heat resistant steel for boiler tube	H.Morimoto	··· 312

D25	Electro magnetic and heat conductive FE analysis on high frequency tube welding process	T.Okabe	··· 316

D26	(Invited Lecture)Butt-welding of layered sheets by pulsed TIG welding and trial fabrication of a double-walled pipe	Y.Kasuga	··· 319

D27	(Invited Lecture)Application of friction stir welding into steels	T.Shinoda	··· 323


D28	Examples and unresolved issues in applications of bainitic microstructures to high strength steel sheets for auto-bodies	M.Takahashi	··· 368

D29	Key to improve fatigue resistance in high strength martensitic steels	H.Yaguchi	··· 372

D30	Recent utilization examples of steels with bainitic microstructure for welded structures and a proposal for future works on their microstructural controls	S.Endo	··· 376

D31	Improvement of strength and toughness by ausforming and it's productive problems	H.Yoshida	··· 380

D32	Materials science and technology on matrensitic steels for advanced USC power plants	M.Igarashi	··· 384

D33	Crystallographical analysis of lath martensite morphology in the ultra-low carbon steels	S.Morito	··· 388

D34	Controlling factors of grain sizes in martensite and bainite structures	T.Furuhara	··· 392

D35	A new approach for interpretation of strengthening mechanism of martensitic steel through characterization of local deformation behavior	T.Ohmura	··· 396

D36	Contribution of mobile dislocations to yielding behavior of martensitic steel	K.Nakashima	··· 400

D37	Work hardening mechanism studied by in situ neutron diffraction during tensile deformation	S.Morooka	··· 404

D38	Effects of a high magnetic field on martensitic and bainitic transformations in Fe-based alloys	H.Ohtsuka	··· 408

D39	Bainite transformation behavior from γ+α' structure	H.Kawata	··· 411


D40	Grain refinement using severe plastic deformation mechanism and limitation	Z.Horita	··· 414

D41	Possibility to manage both high strength and high ductility-toughness in nanostructured metals fabricated by severe plastic deformation	N.Tsuji	··· 418

D42	Ultrafine grained structure formation on the high speed machined surface in carbon steels	M.Umemoto	··· 420

D43	Nanocrystallization by rolling contact fatigue	K.Hiraoka	··· 424


D44	Characterization and analysis of inclusion and precipitate in steels	T.Takayama	··· 562

D45	New development method for inclusion and precipitates analysis	A.Chino	··· 566

D46	Electrolytic extraction method for evaluation of size distribution of inclusion particles in steel	R.Inoue	··· 568

D47	Analysis of inclusions in steel by helium microwave induced plasma atomic emission spectrometry	T.Aiura	··· 572

D48	Determination of inclusion elements in steels by microwave-induced atmospheric-pressure helium plasma spectrometry	H.Iwata	··· 573

D49	(Invited Lecture)Hierarchical characterization of inclusions and precipitates in steel	S.Suzuki	··· 574

D50	(Invited Lecture)Microstructure control of steels using inclusions -Current understandings and future directions	T.Koseki	··· 576