Numerical Simulation Study On Influence Of Cold Rolling Parameters Of 301L Stainless Steel Sheet On Shape

301L stainless steel plate is an important material for urban rail vehicle body.However,in the process of cold rolling of steel plate,various plate shape problems are easy to occur due to improper cold rolling process parameters,which affects the qualification rate of steel plate products.In order to study the shape problem of 301 L stainless steel plate under different cold rolling parameters,the article uses ABAQUS finite element numerical simulation software,firstly,establishes the 3D geometric model of 301 L stainless steel plate and roll to be rolled and assigns the material properties;secondly,The actual cold rolling process parameters are guided by the definition of mutual contact,determining the load and boundary conditions.Finally,the finite element mesh is divided and submitted for analysis,and the dynamic numerical simulation of the cold rolling process of the steel plate is carried out.Under this process,through the control variable method,the parameters of the single cold rolling process are changed while maintaining other cold rolling process parameters,and the rolling pressure and transverse direction of the steel plate under different tensions,friction coefficients and cold rolling speed are obtained.The distribution of thickness deviation,residual stress after rolling and equivalent plastic strain,and its influence on the shape of the plate.By comparison and analysis,the front tension is in the range of 95 MPa~145 MPa,and the back tension is in the range of 45 MPa~95 MPa.With the increase of the front and rear tensions,the rolling pressure decreases and the reduction decreases.The current tension is When 135 MPa and the back tension is 65 MPa,the transverse thickness deviation of the 301 L stainless steel plate after cold rolling is small,the longitudinal residual stress distribution is uniform,and the equivalent plastic strain fluctuation is small;the friction coefficient is in the range of 0.06~0.1,with the increase of friction coefficient Large,rolling pressure increases,the amount of reduction increases.When the friction coefficient is 0.08,the lateral thickness deviation of the 301 L stainless steel plate after cold rolling is small,the longitudinal residual stress distribution is uniform,and the equivalent plastic strain fluctuation is small;the cold rolling speed is In the range of 5 m/s~10 m/s,as the cold rolling speed increases,the rolling pressure decreases and the reduction decreases.When the cold rolling speed is 7.5 m/s,the cold rolled 301 L stainless steel The lateral thickness deviation of the plate is small,the longitudinal residual stress distribution is uniform,and the equivalent plastic strain fluctuation is small;that is,the front-rear tension is matched to 135 MPa,65 MPa,the frictioncoefficient is 0.08,and the cold rolling speed is 7.5 m/s.Smooth,no deviation,card board,after rolling Excellent shape.In order to verify the reliability of the numerical simulation analysis,the single pass rolling of 301 L stainless steel plate was carried out with different front and rear tensions on the actual production line,and the lateral thickness deviation of the steel plate along the width direction of the plate was recorded,and the numerical simulation results and experimental results were obtained by comparison.The agreement shows that the numerical simulation analysis method can provide guidance for the actual production of reasonable process parameters.