Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades

Keywords: mixer blades, wear resistance coefficient, ultimate strength, hypoeutectic cast iron, alloying

Abstract

The object of research is hypoeutectic cast iron intended for cast parts operating under abrasive friction conditions. Such parts are mixer blades, the operational properties of which include durability, assessed by abrasion resistance and strength. To give the blades such properties, cast irons, which are materials of the blades, are alloyed with elements that contribute to the formation of carbides of various compositions. The main problem that impedes the targeted selection of materials for mixer blades or finished blades from different materials or different chemical composition is the lack of substantiated selection criteria. If the shipment is carried out only with the provision of data on the chemical composition of the alloy, it is necessary to be able to evaluate the expected mechanical properties, in particular abrasion resistance and strength.

Using the methods of regression analysis, a mathematical model has been obtained that includes two regression equations, which allows for a targeted selection of the chemical composition that provides the maximum possible value of mechanical properties – ultimate strength and coefficient of wear resistance. Optimization of the chemical composition, carried out according to this model, made it possible to determine the following chemical composition: C=2.94 %, Ceq=3.3 %, Ti=1.56 %, providing the maximum ultimate strength σb=391 MPa; C=2.78 %, Ceq=3.14 %, Ti=1.61 %, providing a maximum wear resistance coefficient Kwr=12 %.

In the case of priority of the strength criterion, the calculated optimal chemical composition makes it possible to reduce the mass-dimensional characteristics of the mixing units of the mixers.

A procedure is proposed for using this model to select a batch of blades with the expected best performance properties

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Author Biographies

Sergei Kharchenko, Kharkiv Petro Vasylenko National Technical University of Agriculture

Department of Technological Systems

Andriy Barsuk, Kharkiv Petro Vasylenko National Technical University of Agriculture

Department of Technological Systems

Nurlana Karimova, Azerbaijan State University of Economics(UNEC)

Department of Engineering and Applied Sciences

Yevhen Pelypenko, National Technical University "Kharkiv Polytechnic Institute"

Department of Car and Tractor Industry

Vadim Shevtsov, National Technical University "Kharkiv Polytechnic Institute"

Department of Car and Tractor Industry

Ivan Morozov, Kharkiv Petro Vasylenko National Technical University of Agriculture

Department of Agricultural Machines

Vladimir Morozov, Kharkiv Petro Vasylenko National Technical University of Agriculture

Department of Economics and Marketing

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Published
2021-05-27
How to Cite
Kharchenko, S., Barsuk, A., Karimova, N., Nanka, A., Pelypenko, Y., Shevtsov, V., Morozov, I., & Morozov, V. (2021). Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades. EUREKA: Physics and Engineering, (3), 99-110. https://doi.org/10.21303/2461-4262.2021.001830
Section
Engineering