Abstract
Based on elasto-plastic deformation straightening theory and by adopting 11 rolls straightening plates , the isothermal residual curvature straightening process was proposed for stainless steel clad plate. The mathematical model of straightening was established to realize plate shape finishing and stress reforming. By using finite element analysis software, establishing straightening process and determining intermesh, the effects of intermesh on shape and residual stress were analyzed. The results indicate that the straightening process met the finishing plainness of stainless steel clad plate after rolling. Longitudinal residual stress of the clad plate was evenly distributed across width. The cladding plate and steel substrate were observed to be symmetrical and the ascent of stress near the edge was greater. Longitudinal residual stress across length was distributed with the wave of pull-press-pull and the cladding plate and base plate were observed to be symmetrical. The above researches are based on the previous theory of the application of stainless steel clad plate straightening technology.
Highlights
Complying with the overall national planning for building a resource-saving and environment-friendly green steel industry, stainless steel clad plate combines high corrosion resistance of stainless steel and excellent mechanical properties of low-alloy steel, mainly used in petrochemical, marine engineering, nuclear and high-quality oil and gas pipelines and other major equipment industry [1, 2]
Parallel roller leveler can straighten the plate with different original curvature even after repeated bending, reduce the residual stress and make it homogenized [4]
Explicit dynamic finite element analysis software ANSYS/LS-DYNA was used to simulate roller-straightening process and analyze the effect of straightening process parameters on straightening quality, which provided some guidance for the production practices of stainless steel clad plate
Summary
Complying with the overall national planning for building a resource-saving and environment-friendly green steel industry, stainless steel clad plate combines high corrosion resistance of stainless steel and excellent mechanical properties of low-alloy steel, mainly used in petrochemical, marine engineering, nuclear and high-quality oil and gas pipelines and other major equipment industry [1, 2]. Because of different deformation resistance and thermal expansion coefficients of stainless steel cladding plate and steel substrate, the hot-rolled stainless steel clad plate shows great bending deformation and residual stress to the side of cladding plate after rolling. This defect is difficult to eliminate in the cold state and greatly influences the shape and quality [3]. Explicit dynamic finite element analysis software ANSYS/LS-DYNA was used to simulate roller-straightening process and analyze the effect of straightening process parameters on straightening quality, which provided some guidance for the production practices of stainless steel clad plate
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