Cold rolling method for improving structure properties of ferritic stainless steel plate strips and analysis method thereof

Abstract

The invention discloses a cold rolling method for improving structure properties of ferritic stainless steel plate strips and an analysis method thereof, belongs to the technical field of cold rolling processes, and solves the problem of low structure properties of traditional cold-rolled ferritic stainless steel plate strips. Based on a deformation resistance model of a blank for cold rolling and thermophysical parameters of a material, a finite element analysis model of the plate strip cold rolling process is built according to a actual cold rolling production process; and under the condition of definite total reduction rate, the shear stress and the shear strain distribution in the plate strips under different gate reduction rate distribution systems are analyzed, and a total reduction rate and a reduction rate distribution system for improving the structure properties of the annealed plate strips are determined through calculating the shear strain energy distribution and change rules in the plate strips. The method can accurately analyze the cold rolling process parameters of the ferritic stainless steel annealed plate strips to improve the structure properties of the ferritic stainless steel annealed plate strips so as to obtain the ferritic stainless steel plate strips with excellent formability.

Description

technical field [0001] The invention belongs to the technical field of cold rolling technology, and in particular relates to a cold rolling method and an analysis method for improving the microstructure and properties of ferritic stainless steel strips. Background technique [0002] Cold rolling uses hot-rolled steel coils as raw materials. After pickling to remove scale, continuous cold rolling is carried out. The finished product is hard rolled coils. Due to cold hardening caused by continuous cold deformation, the strength, hardness, and toughness of hard rolled coils increase. The plastic index decreases, so the stamping performance will deteriorate, and it can only be used for parts with simple deformation. The process of cold rolling production generally includes raw material preparation, pickling, rolling, degreasing, annealing (heat treatment), finishing, etc. Cold rolling uses hot-rolled products as raw materials. Before cold rolling, the raw materials must be deph...

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Problems solved by technology

[0008] Aiming at the problem that the microstructure and properties of the existing cold-rolled ferritic stainless steel strips are not high, the present invention provides a cold rolling method and an analysis method for improving the microstructure and properties of the ferritic stainless steel strips. Through the improvement of the cold rolling process, the improvement The microstructure and properties of ferritic stainless steel strips have been improved, and cold-rolled ferritic stainless steel strips with excellent formability have been obtained

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