Effect of Ultrasonic Treatment on the Solidification Structure of High Carbon Steel Containing Rare Earth Elements

2008 ◽  
Vol 79 (5) ◽  
pp. 358-363 ◽  
Author(s):  
Jie LI ◽  
Wei-qing CHEN ◽  
Qing LIU ◽  
Xiao-feng WANG
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Rare Earth Elements ◽  
Ultrasonic Treatment ◽  
High Carbon Steel ◽  
Solidification Structure ◽  
High Carbon

Effect of Ultrasonic Treatment Time on Inclusions in High Carbon Steel

2011 ◽  
Vol 194-196 ◽  
pp. 336-340 ◽  
Author(s):  
Jie Lie ◽  
Cheng Ling Ge ◽  
Hai Chuan Wang ◽  
Ling Li ◽  
Qi Xuan Rui ◽  
...  
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Oxygen Content ◽  
Ultrasonic Treatment ◽  
Treatment Time ◽  
High Carbon Steel ◽  
Average Diameter ◽  
High Carbon ◽  
Total Oxygen ◽  
Total Oxygen Content

Effect of ultrasonic treatment time on inclusions in high carbon steel with the addition of pure rare earth Ce was investigated. The results showed that ultrasonic treatment could disperse, refine and remove inclusions in molten high carbon steel with rare earth. With the increase of ultrasonic treatment time, total oxygen content of high carbon steel and average diameter of inclusions decreased evidently, inclusions in high carbon steel could be removed in a certain degree, but the number of the inclusions increased significantly. Total oxygen content (mass fraction) of high carbon steel, equivalent number I and average diameter d of inclusions in ingot was respectively 59×106, 134 entries•mm-2 and 2.91 μm when the ultrasonic treatment time was 60 s, at the same time, the percentage of inclusions with diameter D＜2.31 μm is up to more than 43 % of the total.

Deformation and Structure Difference of Steel Droplets during Initial Solidification

2017 ◽  
Vol 36 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Yang Li ◽  
Jing Wang ◽  
Jiaquan Zhang ◽  
Changgui Cheng ◽  
Zhi Zeng
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Carbon Steels ◽  
Solidification Structure ◽  
Low Carbon ◽  
High Carbon ◽  
Peritectic Steel ◽  
Initial Solidification

AbstractThe surface quality of slabs is closely related with the initial solidification at very first seconds of molten steel near meniscus in mold during continuous casting. The solidification, structure, and free deformation for given steels have been investigated in droplet experiments by aid of Laser Scanning Confocal Microscope. It is observed that the appearances of solidified shells for high carbon steels and some hyper-peritectic steels with high carbon content show lamellar, while that for other steels show spherical. Convex is formed along the chilling direction for most steels, besides some occasions that concave is formed for high carbon steel at times. The deformation degree decreases gradually in order of hypo-peritectic steel, ultra-low carbon steel, hyper-peritectic steel, low carbon steel, and high carbon steel, which is consistent with the solidification shrinkage in macroscope during continuous casting. Additionally, the microstructure of solidified shell of hypo-peritectic steel is bainite, while that of hyper-peritectic steel is martensite.

Morphology characteristics of solidification structure in high-carbon steel billet based on fractal theory

2019 ◽  
Vol 54 (19) ◽  
pp. 12851-12862 ◽  
Author(s):  
Jianghai Cao ◽  
Zibing Hou ◽  
Dongwei Guo ◽  
Zhongao Guo ◽  
Ping Tang
Keyword(s):  
Carbon Steel ◽  
Fractal Theory ◽  
High Carbon Steel ◽  
Solidification Structure ◽  
High Carbon ◽  
Steel Billet ◽  
Morphology Characteristics

Effects of Rare Earth on the Impact Toughness of High-Carbon Steel

2011 ◽  
Vol 284-286 ◽  
pp. 1223-1227
Author(s):  
Cheng Jun Liu ◽  
Hong Liang Liu ◽  
Chun Long Li ◽  
Mao Fa Jiang
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Impact Toughness ◽  
Internal Friction ◽  
High Carbon Steel ◽  
The State ◽  
Sulfide Inclusion ◽  
High Carbon ◽  
Friction Curve ◽  
The Impact

The effects and mechanism of cerium, lanthanum and cerium-lanthanum alloys on microstructure and the impact toughness of high-carbon steel were studied in the present work. For high-carbon steel, the state and the content of RE were measured, and the effects and the mechanism of RE on sulfide inclusions, microstructure and the impact toughness of steel were determined. With increasing the RE addition, the sulfide inclusion can be changed from strip-like, spindle, ellipsoidal and spheric in shape. Strip-like sulfide disappears in high-carbon steel with the RE addition being 0.05%. A small quantity of RE can fine the austenitic grain, decrease the height of the SKK peak of the internal friction curve, and improve the impact toughness of high-carbon steel evidently. And the effects of lanthanum on fining the austenitic grain and improving the impact toughness is the largest, next to that of cerium-lanthanum alloys, and that of cerium is the least, which can be verified by the internal friction experiments.

Effects of Ce or Nb Addition on Nucleation of Pearlite in High Carbon Steel

2013 ◽  
Vol 734-737 ◽  
pp. 1531-1535 ◽  
Author(s):  
Yu Liang ◽  
Zhi Yi Shi ◽  
Yi Long Liang
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Strain Energy ◽  
High Carbon Steel ◽  
Pearlitic Steel ◽  
Activation Energies ◽  
High Carbon ◽  
Pearlitic Transformation ◽  
Proeutectoid Ferrite ◽  
Nb Addition

The high-carbon steel was micro-alloying by Ce and Nb respectively, and the effect of micro-alloying on the nucleation of pearlite was reported in the present work. The results show that the pearlite could nucleate in rare earth sulfide inclusions and Nb-containing precipitates. The formation of NbC caused the C-depleted zone, promote the formation of proeutectoid ferrite of the pearlite. And the strain energy caused by rare earth sulfide inclusions will provide activation energies for pearlitic transformation. The inclusion and precipitates will increase the rate of nucleation of pearlite and refined the microstructures of pearlitic steel.

Bending Property of Liner Laser Irradiated Thin High Carbon Steel

2010 ◽  
Vol 638-642 ◽  
pp. 3302-3306 ◽  
Author(s):  
Hiroshi Kawakami ◽  
Ahmad Faisal ◽  
Hitoshi Ozaki ◽  
Jippei Suzuki
Keyword(s):  
Carbon Steel ◽  
Laser Irradiation ◽  
Heat Input ◽  
Steel Plate ◽  
High Carbon Steel ◽  
Solidification Structure ◽  
Bending Test ◽  
Irradiation Condition ◽  
High Carbon ◽  
Bending Property

Effect of liner laser irradiation on bending properties of thin high carbon steel plate was investigated in this study. Laser-transformed zone included solidification structure and quenched zone by laser irradiation was observed in cross section area of specimen by double-etching. Shape of laser-transformed zone changed significantly with changing of heat input. Deformation after laser irradiation occurred by the excess of heat input. Average area ratio of laser-transformed zone for normal bending specimen without deformation was cleared at each thickness. Sensitivity for laser deformation increased with decreasing of thickness. Three points bending test was executed to obtain Flexural load-deflection curve. Bending property of thin steel plate improved by laser liner irradiation and flexural load per unit deflection increased by suitable laser irradiation condition. Absorb energy of bending test also increased by existence of laser-transformed zone.

scholarly journals Morphology of Solidification Structure and MnS Inclusion in High Carbon Steel Continuously Cast Bloom

2017 ◽  
Vol 57 (11) ◽  
pp. 2000-2009 ◽  
Author(s):  
Sen Luo ◽  
Bingyu Wang ◽  
Zhaohui Wang ◽  
Dongbin Jiang ◽  
Weiling Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
High Carbon Steel ◽  
Solidification Structure ◽  
High Carbon ◽  
Continuously Cast
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