Building low-cycle fatigue curve to assess remaining lifetime of steel-teeming ladle turret

International Conference on Construction, Architecture and Technosphere Safety 2018

土木建筑工程

Gubaidulin, R.G.^1 ; Tingaev, A.K.^2

Building Structures and Facilities, South Ural State University, Lenin Avenue, 76, Chelyabinsk

454080, Russia^1

Facility and Welding Production Technology, South Ural State University, Lenin Avenue, 76, Chelyabinsk

454080, Russia^2

关键词: Confidence interval;    Experimental values;    High temperature detectors;    Lateral deformation;    Regression equation;    Sample deformation;    Stress and deformation;    Thermomechanical simulator;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/451/1/012056/pdf
DOI  :  10.1088/1757-899X/451/1/012056

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The tests were performed for low-cycle fatigue at the temperature of 90°C on the 15XCH steel samples, which were taken from a lifting beam of CCM turret No.6 of PJSC Magnitogorsk Iron & Steel Works (MMK). The tests were performed using the Gleeble 3800 thermomechanical simulator in air atmosphere. The measurements of the sample deformations in the course of the testing were performed using a high-temperature detector of lateral deformations. According to the test results, fatigue curves were built for stress and deformation conditions, as well as a cycle curve of deformation. Regression equations were obtained for the low-cycle fatigue curve for stress and deformation conditions, as well as the regression equation for the cycle curve of deformation. It was demonstrated that the experimental values of stress and deformation conditions fit into the confidence interval of these equations with a probability of 99.5%, which allows using them for the assessment of the remaining lifetime of cyclically loaded structures of CCM ladle turret No.6.