Separation of electrically neutral non-metallic inclusions from molten steel by pulsed electric current

Zhang, Xinfang; Qin, Rongshan

doi:10.1080/02670836.2016.1275451

Cited by 13 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…EPT has been used for auxiliary turning operations to enhance the plastic deformation and cutting performance of the workpiece [ 39 , 40 ]. In addition, electropulsing could induce the redistribution of particles in liquid suspensions and helps clean molten materials from insulating oxides [ 41 , 42 ] and electrically neutral non-metallic inclusions [ 43 ]. By combining EPT with other material processing techniques, such as conventional heat treatment [ 44 ], high energy electron beam treatment [ 45 ] and ultrasonic shock treatment [ 46 , 47 ], enhanced material properties and performance could be achieved, including improved dynamic ductility of alloys due to the formation of ultra-fine grains microstructure and higher surface quality of alloys [ 48 , 49 , 50 ].…”

Section: Introductionmentioning

confidence: 99%

Application of High-Density Electropulsing to Improve the Performance of Metallic Materials: Mechanisms, Microstructure and Properties

et al. 2018

View full text Add to dashboard Cite

The technology of high-density electropulsing has been applied to increase the performance of metallic materials since the 1990s and has shown significant advantages over traditional heat treatment in many aspects. However, the microstructure changes in electropulsing treatment (EPT) metals and alloys have not been fully explored, and the effects vary significantly on different material. When high-density electrical pulses are applied to metals and alloys, the input of electric energy and thermal energy generally leads to structural rearrangements, such as dynamic recrystallization, dislocation movements and grain refinement. The enhanced mechanical properties of the metals and alloys after high-density electropulsing treatment are reflected by the significant improvement of elongation. As a result, this technology holds great promise in improving the deformation limit and repairing cracks and defects in the plastic processing of metals. This review summarizes the effect of high-density electropulsing treatment on microstructural properties and, thus, the enhancement in mechanical strength, hardness and corrosion performance of metallic materials. It is noteworthy that the change of some properties can be related to the structure state before EPT (quenched, annealed, deformed or others). The mechanisms for the microstructural evolution, grain refinement and formation of oriented microstructures of different metals and alloys are presented. Future research trends of high-density electrical pulse technology for specific metals and alloys are highlighted.

show abstract

Section: Introductionmentioning

confidence: 99%

Application of High-Density Electropulsing to Improve the Performance of Metallic Materials: Mechanisms, Microstructure and Properties

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The flow of the electric current created a self-induction magnetic field inside and outside the melt pool. Considering the axial symmetry of current distribution and according to Kirchhoff’s current law, the magnetic flux density along the radius can be expressed as [ 24 ]:

where

is the magnetic permeability,

is the current through the melt pool,

is the current density,

is the distance from any point to the axis, and

is the radius of the melt pool.…”

Section: Resultsmentioning

confidence: 99%

“…The flow of the electric current created a self-induction magnetic field inside and outside the melt pool. Considering the axial symmetry of current distribution and according to Kirchhoff's current law, the magnetic flux density along the radius can be expressed as [24]:…”

Section: The Effect Of Pulsed Currentmentioning

confidence: 99%

Effects of Pulsed Current on the Microstructure and Properties of Laser Cladded TC17 Titanium Alloy

Liu,

Zhou

et al. 2023

Materials

View full text Add to dashboard Cite

In this study, a titanium alloy substrate was cladded with TC17 titanium alloy powder using the pulsed-current (PC)-assisted laser cladding technique. The primary objective of this research was to assess the impact of varying pulsed current intensities on the morphology, microstructure, and properties of samples. It is observed that the utilization of pulsed currents significantly enhances the metallurgical adhesion between the samples, concurrently diminishing the occurrence of porosity within the cladding layer. The incorporation of a pulsed current also has a positive impact on the microhardness and corrosion resistance of the samples. Furthermore, the synergistic influence of laser energy and a pulsed electrical current is found to promote a structural evolution in materials towards a state with lower electrical resistance. The introduction of a pulsed current leads to preferential growth of β grains with <100>// cladding direction in the cladding zone and obtains the typical {100} < 001 > cube texture, while the substrate zone exhibits a distinctive stripe-like configuration formed by the primary α-phase constituents. The outcomes of this study show the pivotal role of pulsed currents as an auxiliary technique for enhancing the properties and effecting microstructural modifications in titanium alloys during the laser cladding process.

show abstract

“…The process should simplify and improve production efficiency while ensuring a good structural uniformity (eliminating network carbides). As a high-density energy input method, the pulsed electric current has the advantages of rapid response speed and high energy conversion rate [22]. Previous research show that the current can promote the precipitate dissolution, such as the Crrich carbide in M50 bearing steel, the secondary carbide precipitated during tempering in M2 high-speed steel, the η phase in nickel-based superalloy, and so on [23][24][25], thus significantly revamping the microstructure and properties in metallic materials [26,27].…”

Section: Introductionmentioning

confidence: 99%

Realising carbide ultrafast homogenisation under pulsed electric current

Hao

Qin

Liu

et al. 2022

Materials Science and Technology

View full text Add to dashboard Cite

Network carbides, as a deleterious precipitate to the mechanical properties of bearing steel, are difficult to eliminate by traditional heat treatment. Here, an innovative strategy to rapidly dissolve network carbides using electric current pulses to improve the uniformity of the microstructure is proposed. The results show that the diffusion driven by electromigration is significantly enhanced compared to traditional heat treatment due to the high-density current on the network carbide surface. Furthermore, grain boundaries as fast diffusion paths play a key role in accelerating the dissolution of network carbides.

show abstract

Separation of electrically neutral non-metallic inclusions from molten steel by pulsed electric current

Cited by 13 publications

References 18 publications

Application of High-Density Electropulsing to Improve the Performance of Metallic Materials: Mechanisms, Microstructure and Properties

Application of High-Density Electropulsing to Improve the Performance of Metallic Materials: Mechanisms, Microstructure and Properties

Effects of Pulsed Current on the Microstructure and Properties of Laser Cladded TC17 Titanium Alloy

Realising carbide ultrafast homogenisation under pulsed electric current

Contact Info

Product

Resources

About