Study of Transverse Crack Formation of a Nb-Peritectic Steel

2012 ◽  
Vol 706-709 ◽  
pp. 1466-1473
Author(s):  
S. Nafisi ◽  
L. Collins ◽  
E.S. Szekeres
Keyword(s):  
Transverse Crack ◽  
Crack Formation ◽  
Cast Steel ◽  
Infrared Camera ◽  
Temperature History ◽  
Hot Ductility ◽  
Peritectic Steel ◽  
Ductility Trough ◽  
Continuously Cast ◽  
Crack Susceptibility

The problem of transverse crack formation in continuously cast steel has been an issue for over 30 years. The crack susceptibility depends not only to the steel composition, but also to the temperature history during casting. To improve the surface quality, two key solutions have been suggested; adjusting the straightening stage to an appropriate temperature range, out of hot ductility trough, and/or alloy modification. These solutions have certain limitations and difficulties still exist for grades such as peritectic steels containing Nb or V. In this article, the hot ductility of a peritectic steel grade with Nb has been studied under direct cast conditions. This was performed using a Gleeble 3800 thermo-mechanical simulator under two critical strain rates. In addition, the transverse crack formation and appearance, as well as the application of infrared camera to study the surface temperature profile of the slabs is presented.

Hot Ductility Variations of ST52-3 Continuously Cast Steel within the Cast Strand

2010 ◽  
Vol 659 ◽  
pp. 13-18
Author(s):  
Viktor Gonda ◽  
Zsolt Csepeli ◽  
Ibolya Kardos ◽  
Balázs Verő ◽  
József Csizmadia
Keyword(s):  
Mechanical Properties ◽  
Cast Steel ◽  
Steel Grade ◽  
Hot Ductility ◽  
Microstructural Properties ◽  
Melt Temperature ◽  
Columnar Grains ◽  
Continuously Cast ◽  
Metallurgical Length ◽  
Crack Susceptibility

Along the metallurgical length at continuous casting, the temperature within the strand ranges from above melt temperature (>1500) to about 900 oC. In this range, mechanical properties drastically drop at above the zero deformation temperature (ZDT) and the zero strength temperature (ZST), therefore crack susceptibility increases. These temperatures depend on (local) chemical and microstructural properties. We investigated the change in ZDT and ZST for ST52-3 steel grade by taking samples from the as-cast strand from positions of the columnar grains and from the centreline segregated zone. We found more than 100 oC drop in ZDT due to segregations in the centreline compared to the columnar zone within the strand.

Simulation of transverse crack formation on continuously cast peritectic medium carbon steel slabs

1999 ◽  
Vol 70 (10) ◽  
pp. 412-419 ◽  
Author(s):  
Mikio Suzuki ◽  
Hiroshi Hayashi ◽  
Hiroyuki Shibata ◽  
Toshihiko Emi ◽  
In-Jae Lee
Keyword(s):  
Carbon Steel ◽  
Transverse Crack ◽  
Crack Formation ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Continuously Cast ◽  
Steel Slabs

Inter-Columnar Macro-Segregation in Continuously Cast Steel; Characterization, Possible Reasons, and Consequences

2021 ◽  
Author(s):  
Seenivasan Rajiah ◽  
Manjini Sambandam ◽  
Sethu Prasanth Shanmugam ◽  
Saju Vikraman ◽  
Rajendra Taticherla
Keyword(s):  
Cast Steel ◽  
Continuously Cast

scholarly journals An evaluation of critical strain for internal crack formation in continuously cast slabs.

1986 ◽  
Vol 26 (6) ◽  
pp. 540-546 ◽  
Author(s):  
Tooru MATSUMIYA ◽  
Michihisa ITO ◽  
Hiroyuki KAJIOKA ◽  
Shigehiro YAMAGUCHI ◽  
Yasushi NAKAMURA
Keyword(s):  
Critical Strain ◽  
Crack Formation ◽  
Internal Crack ◽  
Continuously Cast

Improvement of hot ductility of C-Mn Steel containing arsenic by rare earth Ce

2018 ◽  
Vol 115 (4) ◽  
pp. 419 ◽  
Author(s):  
Wenbin Xin ◽  
Jing Zhang ◽  
Guoping Luo ◽  
Ruifen Wang ◽  
Qingyong Meng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Grain Boundary ◽  
Boundary Segregation ◽  
Fracture Morphology ◽  
Grain Boundary Segregation ◽  
Hot Ductility ◽  
Ductility Trough ◽  
Reduction Of Area ◽  
Mn Steel ◽  
Ce Content

The effect of different Ce content on the hot ductility of C-Mn steel containing arsenic was investigated at the temperature ranging from 700 to 1100 °C conducting Gleebel-1500 thermal-mechanical simulator. The reduction of area (RA%) was used to evaluate the hot ductility. The 0.16 mass% As widened the ductility trough range and especially, decreased the RA value at 850–950 °C. Conversely, adding Ce in the steel could remedy the arsenic-induced hot ductility deterioration. Moreover, with the increase of Ce content from 0 to 0.035 mass%, the RA value at 800–950 °C significantly increased, compared to that of the arsenic steel. When the content of Ce reached 0.027–0.035 mass%, the RA value at 800–850 °C was even higher than that of steel without As. Besides, the corresponding fracture morphology was changed from intergranular feature to ductile and/or interdendritic feature. Grain refinement by Ce addition, the formation of arsenious rare earth inclusions and grain boundary segregation of Ce were considered to improve the hot ductility of the steel containing As.

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