Research on micromagnetic non-destructive evaluation method of mechanical properties of DP590 cold rolled high strength steel
DP590 is one of the representative products of cold rolled high strength steel,and its production process requirements are extremely strict.Due to the temperature drop at the edge of the strip in production,the mechanical properties of the edge and middle of the strip fluctuate greatly,but the evaluation of the mechanical properties of the whole area along the width of the strip is an important reference for the adjustment of production process parameters.At present,the sampling and destructive testing methods used cannot meet the evaluation requirements of the whole and the whole area of the properties along the width of the strip.Micromagnetic detection is a non-destructive and efficient property evaluation method,based on the principle of micromag-netism,and a variety of magnetic features collected are related to the mechanical properties of the corresponding position.DP590 high strength steel produced by Shougang Shunyi Cold Rolling Company was selected as the research object,and the correlation between various micromagnetic characteristics and their yield strength,tensile strength and elongation after break(A80)were an-alyzed,and the corresponding quantitative prediction model was established by neural network method,and the prediction accu-racy of the model was more than 93％,which can be used for actual production.
cold rolled high strength steelmechanical propertiesmicromagnetic non-destructive detectionquantitative forecas-tingneural networks
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