Effects of deformation temperature on the microstructure, ordering and mechanical properties of Fe–6.5wt% Si alloy with columnar grains

Effects of rolling temperature on microstructure, texture, formability and magnetic properties in strip casting Fe-6.5 wt% Si non-oriented electrical steel

“…High density of dislocation and high degree of dislocation tangles existed in the rolled samples at lower rolling temperature range (150-450°C). Both the densities of dislocation and dislocation tangles gradually reduced with raising rolling temperature, in good agreement with the result by Mo Yuanke et al [23]. At higher rolling temperature range (650-850°C), both the densities of dislocation and dislocation tangles significantly reduced.…”

“…3, which indicated that the plasticity of 6.5 wt% Si steel during rolling deformation could be much improved by increasing rolling temperature. It was previously reported that the deformation mechanism of the columnar-grained Fe-6.5 wt% Si alloy was twinning and dislocation glide [7,8,23]. By contrast, in the present work, the plasticity during rolling deformation was attributed to the dominant deformation mechanism, i.e.…”

Improved Plasticity and Cold-rolling Workability of Fe–6.5wt%Si Alloy by Warm-rolling with Gradually Decreasing Temperature

“…The Fe-6.5wt%Si alloy exhibits the characteristics of disordering by deformation [16,22,23] and reordering at high temperature [15,16] . These characteristics are related to the deformation temperature, and the lower deformation temperature leads to the higher disordering and the lower reordering [16] .…”

“…When the warmrolling temperature was increased to 500°C, warm-rolling with a total reduction of 93% and without obvious edge crack can be conducted on the alloy sheets. However, when deforming at high temperature, the order degree of the Fe-6.5wt%Si alloy sample is high due to the reordering [16] , which is unfavorable for the subsequent cold-rolling workability [5,15] .…”

Preparation of High Silicon Electrical Steel Sheets with Strong {100} Recrystallization Texture by the Texture Inheritance of Initial Columnar Grains

“…In this case, the formation of {100} recrystallization texture was not directly related to the deformation stored energy and rolling conditions but was predominately ascribed to both the initial microstructure and texture. In our previous studies, directional solidification method was used to prepare the high silicon electrical steel slabs with strong h001i oriented columnar grains (mainly containing near {100}h001i orientation), [12] afterwards, by using manifold toughening methods including deformation softening and heat treatment, [13][14][15] the heavy reduction of warm and cold rolling was successfully used to fabricate high silicon steel sheets with thickness of 0.1 to 0.4 mm. [16,17] It was possible to develop an advanced casting-rolling technology for producing high silicon electrical steel sheet by proper control of solidification and subsequent processes.…”