Sead Spuzic

Publications (3) View all

• Conference Proceeding: Development of parameterized roll pass design based on a hybrid model

  Bin Huang, Ke Xing, S. Spuzic, K. Abhary
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  ABSTRACT: Hot steel rolling is an important manufacturing process used to efficiently provide a wide range of products of high quantity and quality. In order to meet the continuously increasing demands, both an improved quality and a broader variety of products must be delivered along with improvements in efficiency, reliability and sustainability of rolling mill systems. Further development of roll pass design presents one of the central aspects in these efforts. However, to optimize roll pass design, numerous combinations of system parameters must be analyzed and correlated. This cannot be done through a single deterministic model. Therefore, a parameterized hybrid model based on combining cross-disciplinary knowledge is proposed to improve the quality and efficiency of roll pass design. Application of artificial intelligent algorithms is envisaged for the roll pass design optimization and a methodology for constructing the relevant hybrid model is described.
  Mechanical and Electrical Technology (ICMET), 2010 2nd International Conference on; 10/2010
• Article: Fractional design of experiments applied to a wear simulation

  S. Spuzic, M. Zec, K. Abhary, R. Ghomashchi, I. Reid
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  ABSTRACT: A multidisciplinary approach to wear simulation to investigate rolling-sliding abrasion is described. Wear is a stochastic process where fatigue combines with abrasion, adhesion and corrosion. Statistical methods were found to be highly suitable for conceiving and analysing laboratory simulation of the wear process. A special procedure of so-called two-level complex design of experiments is described. By the way of an example, a fractional experimental design is presented showing a procedure for simulataneous evaluation of the influence of force, temperature, material and sliding on abrasion of rolling mill tool materials. A set of laboratory treatments was conducted via two-disc testing and single-scratch testing.The results, including analyses of the wear track via profilometry and metallography are described. Wear phenomena are discussed from statistical, mechanistic and microstructural viewpoints. The heterogeneous polycrystalline materials exhibit inherently stochastic attributes. The additional factors causing the dispersion in the measured wear rate were the technical characteristics of the laboratory devices. However, by virtue of the statistical design of the experiments and subsequent analyses, these variations were monitored, and the main effects and interactions, characterising the abrasive wear, were satisfactorily diagnosed.
  Wear.
• Article: Wear of hot rolling mill rolls: an overview

  S. Spuzic, K.N. Strafford, C. Subramanian, G. Savage
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  ABSTRACT: Rolling is today one of the most important industrial processes because a greater volume of material is worked by rolling than by any other technique. Roll wear is a multiplex process where mechanical and thermal fatigue combines with impact, abrasion, adhesion and corrosion, which all depend on system interactions rather than material characteristics only. The situation is more complicated in section rolling because of the intricacy of roll geometry. Wear variables and modes are reviewed along with published methods and models used in the study and testing of roll wear. This paper reviews key aspects of roll wear control — roll material properties, roll pass design, and system factors such as temperature, loads and sliding velocity. An overview of roll materials is given including adamites, high Cr materials, high speed tool steels and compound rolls. Non-uniform wear, recognised as the most detrimental phenomenon in section rolling, can be controlled by roll pass design. This can be achieved by computer-aided graphical and statistical analyses of various pass series. Preliminary results obtained from pilot tests conducted using a two-disc hot wear rig and a scratch tester are discussed.
  Wear.