Effects of hot rolled microstructure after twin-roll casting on microstructure, texture and magnetic properties of low silicon non-oriented electrical steel

Liu, Haitao; Wang, Yinping; An, Ling-Zi; Wang, Zhaojie; Hou, Dao-Yuan; Chen, Jun-Mou; Wang, Guodong

doi:10.1016/j.jmmm.2016.07.034

Cited by 43 publications

(4 citation statements)

References 26 publications

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“…2 (b)-(f)). After cold rolling processes, an inhomogeneous microstructure was formed, which can be attributed to the work hardening difference between grains with different orientations [27]. During annealing processes, a number of nucleation sites were generated with the increase of annealing temperatures from 800 to 850 ℃, causing a decline of average grain size (as shown in Table 2).…”

Section: Microstructurementioning

confidence: 99%

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Sun

et al. 2022

Int J Adv Manuf Technol

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Systematic study on the microstructural evolution and mechanical properties of ferritic stainless steel (FSS) 430 with different annealing processes were carried out in the present work. The results show that microstructural re nement can be achieved by optimization of annealing processes, improving elongation, yield strength and tensile strength of FSS 430. An optimal annealing temperature of 950 ℃ is found with better homogeneity and enhanced mechanical properties among the cold-rolled and annealed FSSs. During annealing processes, the fraction of high angle grain boundaries of FSS 430 annealed at 950 ℃ is found to be the highest, indicating that a homogeneous microstructure with high recrystallization rate is formed inside the FSS 430 strips. In addition, high fraction of the hard grains (SF < 0.4) and low fraction of the soft grains are found inside FSS 430 annealed at 950 ℃, improving the plasticity of material. Overall, the optimization of annealing processes bene ts the microstructural re nement of FSS and thereby improving the mechanical properties of materials.

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Section: Microstructurementioning

confidence: 99%

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Sun

et al. 2022

Int J Adv Manuf Technol

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“…Twin-roll strip casting is a novel forming technology with a near-net shape, directly producing a few millimeter-thick sheets (1-5 mm) from molten metal due to subrapid solidification (10 2 -10 4 • C/s) [23]. This forming technology has been widely utilized for the plate/strip production of magnesium alloys [24,25], aluminum alloys [26,27], low carbon steels [28,29], silicon steels [30,31] and TWIP/TRIP steels [32,33]. The most important characteristic of TRSC is that it can provide a fast cooling rate during casting, leading to subrapid solidification of the molten steel.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Characteristics, Mechanical Properties and Strain Hardening Behavior of B2 Intermetallic Compound-Strengthening Fe-16Mn-9Al-0.8C-3Ni Steel Fabricated by Twin-Roll Strip Casting, Cold Rolling and Annealing

et al. 2023

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In this study, the Fe-16Mn-9Al-0.8C-3Ni (wt.%) lightweight steel was fabricated by novel twin-roll strip casting technology. The microstructure, tensile properties and strain-hardening behavior of the present steel have been investigated and compared to those of conventionally processed steels with similar chemical compositions. After annealing, a unique gradient microstructure of intermetallic compound (B2)-austenite was obtained along the thickness direction, consisting of granular B2 (average: 430 nm) and fine austenite (average: 1.82 μm) at the surface layer, blocky B2 (average: 1.03 μm) and medium austenite (average: 3.98 μm) at the quarter layer and polygonal B2 (average: 1.94 μm) and coarse austenite (average: 6.13 μm) at the center layer. The cooperative action of B2 pinning dislocation, plane slip and back stress led to stronger strain hardening, among which the strong back stress effect originated from the multistage discontinuous austenite deformation and the mechanical incompatibility between austenite and B2 is believed to be the most important reason, thereby achieving an excellent balance of strength (ultimate tensile strength: 1147 MPa) and ductility (total elongation: 43.2%). This work not only developed a new processing way to fabricate Ni-containing Fe-Mn-Al-C lightweight steel with outstanding mechanical properties, but also provided a potential solution for manufacturing some other metallic materials accompanied by brittle B2 intermetallic.

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“…In addition, the presence of silicon in iron in an amount of 4 % or more increases the electrical resistivity compared to pure iron, resulting in reduced eddy current losses. Such a complex of chemical interactions of silicon leads to an increase in the probability of the formation of defects in the structure of electrical steel [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Determination the causes of premature destruction of sheet electrical steel

Kovbasiuk¹,

Duriagina²,

Kulyk³

et al. 2022

UJMEMS

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Sheets of electrical steel are produced by hot and cold working by pressure (mainly by rolling). In this case, the load during rolling should be chosen in such a way as not to impair the electrical properties of the steels. Received two sheets of electrical steel from different production batches. One of the sheets of electrical steel is prematurely destroyed at the stage of machining parts for electrical transformers. It has been established that an increased content of phosphorus worsens the characteristics of plasticity, which can complicate the process of pressure treatment in the manufacture of sheet electrical steel. Macrostructural analysis revealed longitudinal lines due to rolling. In places of greatest deformation, perpendicular to the direction of rolling, there are cracks and chipping of the insulating layer. Microstructural analysis showed that the cracks formed in the process of rolling sheet electrical steel propagate to a depth of 1.5–2.0 µm. The presence of linear depressions in the structure of the sheet steel indicates that the critical overload has been exceeded during rolling. The increased microhardness in samples of electrical steel is explained by the increased concentration of macro- and microstructural defects formed during the rolling process. It has been established that the main reasons for the premature destruction of electrical steel sheets are an increased content of harmful impurities and incorrectly selected pressure treatment modes, leading to the formation of macrocracks.

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Effects of hot rolled microstructure after twin-roll casting on microstructure, texture and magnetic properties of low silicon non-oriented electrical steel

Cited by 43 publications

References 26 publications

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

An analysis of microstructure and mechanical properties of ferritic stainless steel 430 during cold rolling and subsequent annealing

Microstructure Characteristics, Mechanical Properties and Strain Hardening Behavior of B2 Intermetallic Compound-Strengthening Fe-16Mn-9Al-0.8C-3Ni Steel Fabricated by Twin-Roll Strip Casting, Cold Rolling and Annealing

Determination the causes of premature destruction of sheet electrical steel

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