A Study on the smelting process of low carbon steel scrap and sponge iron in medium frequency induction furnace for production of front bumper beams

MS1200 steel grade is now widely utilized in the automotive sector because it is a good solution for the current trend of vehicle chassis frame construction. This research presents a technology procedure for producing MS1200 steel grade from low carbon steel scrap and sponge iron – a product of MIREX Vietnam. The smelting using up to 30 % sponge iron briquettes combined with low carbon scrap, FeSi, FeMn, FeCr, FeTi,… was realized in a medium frequency induction furnace. The heat treatment for forged steel was performed to obtain required properties. The steel product has the following properties: tensile strength σb = 1280 MPa, yield strength σ0.2 = 990 MPa and impact toughness ak = 769 J/mm2, that meets the need of industrial use.

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Factors Influencing Dephosphorization of Low Carbon Steel in Converter

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1047.111 ◽

2021 ◽

Vol 1047 ◽

pp. 111-119

Author(s):

Zhao Liu ◽

Shu Sen Cheng ◽

Liang Wang

Keyword(s):

Carbon Steel ◽

Low Temperature ◽

Slag Composition ◽

Phosphorus Content ◽

Low Carbon Steel ◽

Smelting Process ◽

Low Carbon ◽

Factors Influencing ◽

High Basicity ◽

Metal Yield

A 300-metric ton converter in a steel plant in China was studied. The influence of factors such as slag composition and temperature in the smelting process on the dephosphorization effect was statistically analyzed. The dephosphorization ability of slag increased firstly and then decreased with the increase of temperature, basicity and FeO content. Low-temperature, high-basicity and high-oxidizing slag are thermodynamically beneficial to promote the dephosphorization reaction, but the basicity is higher than 4.0, and the temperature is higher than 1640 °C are not conducive to the slag to obtain better fluidity. At the same time, too high FeO content will increase the activity coefficient of P2O5, thereby increasing its activity, which is not conducive to the progress of the dephosphorization reaction. As the end point content of carbon decreases, the oxygen content increases and the phosphorus content decreases. A very low carbon content is not conducive to metal yield and temperature control.

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Research and Application of Basic Tundish Covering Flux

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.941-944.178 ◽

2014 ◽

Vol 941-944 ◽

pp. 178-181

Author(s):

Zhi Zheng Yang ◽

Gang Qiang Li ◽

Jiang Ping Rao ◽

Yan Feng Wang ◽

Cheng Hong Huang ◽

...

Keyword(s):

Carbon Steel ◽

Elementary Theory ◽

Process Condition ◽

Low Carbon Steel ◽

Steel Grade ◽

Low Carbon ◽

Content Change ◽

Basic Flux ◽

Ultra Low Carbon Steel ◽

Micro Alloyed Steel

The elementary theory of functions of the basic tundish coving flux is analyzed at the beginning of this paper. Several types of the flux used in deferent steel grade include ultra-low carbon steel, low carbon steel and micro-alloyed steel. The result shows that the basic flux with CaO/SiO2 to be 3~5 can help to control the SiO2 be reduced by Al in steel within ±2%, and whole cleaness keeps stable with suitable component and proper process condition, marked with the T[O] content change ranged within 3ppm. But the basicity should be variable considering the productivity for different steel grade.

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Microstructure and Formation Mechanism of Two-Liquid Bimetal Composite Interface

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.390 ◽

2013 ◽

Vol 690-693 ◽

pp. 390-393 ◽

Cited By ~ 1

Author(s):

Yong Chang Zhu ◽

Shou Fan Rong ◽

Han Song Yang ◽

Zun Jie Wei ◽

Miao Miao Han

Keyword(s):

Carbon Steel ◽

Induction Furnace ◽

High Carbon Steel ◽

Low Carbon Steel ◽

Bonding Layer ◽

Low Carbon ◽

Obvious Effect ◽

Metallurgical Bonding ◽

Composite Interface ◽

Bimetal Composite

Two-liquid bimetal composite casting technology by double induction furnace fusion was utilized for preparing bimetal product in tradition. Single induction furnace fusion has been investigated between the high carbon steel and the low carbon steel, and varying casting thickness has an obvious effect on the bimetal bonding layer. The results have shown that the bimetal bonding layer can not been generated under over thinness or thickness. In the condition of the thicker low carbon steel, two kinds of metal liquid were easy to rush mixture without the distinct interface, whereas the thinner low carbon steel can also effectively form metallurgical bonding. While the low carbon steel owned the proper thickness, metallurgical bonding can been observed distinctly, confirming the feasibility of the single induction fusion for preparing the bimetal.

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Reasearch and Application of Basic Tundish Covering Flux in Continuous Casting Process in WISCO

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1089.346 ◽

2015 ◽

Vol 1089 ◽

pp. 346-349

Author(s):

Jiang Ping Rao ◽

Gang Qiang Li ◽

Zhi Zheng Yang ◽

Yan Feng Wang

Keyword(s):

Carbon Steel ◽

Process Condition ◽

Low Carbon Steel ◽

Casting Process ◽

Steel Grade ◽

Low Carbon ◽

Content Change ◽

Basic Flux ◽

Ultra Low Carbon Steel ◽

Micro Alloyed Steel

Fundamental theory of functions of basic tundish coving flux is analyzed at the first step. Several types of the flux used in deferent steel grade include ultra-low carbon steel, low carbon steel and micro-alloyed steel are involved . The result shows that the basic flux with CaO/SiO2 to be 3~5 can help to control the SiO2 be reduced by Al in steel within ±2%, and whole cleaness keeps stable with suitable component and proper process condition, marked with the T[O] content change ranged within 3ppm. But the basicity should be variable considering the productivity for different steel grade.

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