Mathematical modelling of controlled cooling and properties of hot rolled steel

10th International Symposium Machine and Industrial Design in Mechanical Engineering

工业技术;机械制造

Smoljan, B.^1 ; Iljki, D.^2 ; Hanza, S.S.^2 ; Štic, L.^2 ; Bori, A.^2 ; Joki, M.^1 ; Seni, B.^3 ; Vertnik, R.^3

Polytechnic of Pula, University of Applied Sciences, Riva 6, Pula

52100, Croatia^1

University of Rijeka, Faculty of Engineering, Department of Materials Science and Engineering, Vukovarska 58, Rijeka

51000, Croatia^2

Štore Steel D.o.o., elezarska cesta 3, Štore, Slovenia^3

关键词: Austenite decomposition;    Chemical compositions;    Control volume methods;    Industrial production;    Low alloyed steels;    Micro-structure evolutions;    Model and algorithms;    Transient temperature fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/393/1/012035/pdf
DOI  :  10.1088/1757-899X/393/1/012035

学科分类：工业工程学

来源: IOP

【 摘 要 】

Numerical model of controlled cooling in the production of steel hot rolled bars was developed. The numerical model and algorithm are completed to solve problems in controlled cooling of hot rolled bars in cooling beds. The controlled cooling is performed by special placement of hot rolled bars on cooling beds. By numerical model of controlled cooling is possible to predict a transient temperature field, microstructure evolution and hardness of round steel bars during their cooling in cooling beds. The numerical model of transient temperature field is based on control volume method. The hardness and microstructure distribution in steel bars has predicted by using equations of austenite decomposition kinetic. The algorithm for prediction is based the real chemical composition. Numerical model and computer program were experimentally verified by experimental work in a real industrial production of low-alloyed steel bars. The verification of developed numerical model was performed by comparison of simulated with experimentally evaluated results hardness and cooling curve.