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2 2020

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Thermodynamic approach to the development and selection of hardfacing materials in energy industry

Shihab Thaer, Prysyazhnyuk Pavlo, Semyanyk Iryna, Anrusyshyn Roman, Ivanov Olexandr, Troshchuk Lyubomyr

Management Systems in Production Engineering

2020

nr 2 (28)

84--89

The overall study objection is selection and optimization all available thermodynamic data required for using calculation of phase diagram (CALPHAD) technique within the Fe-C-Cr-Mn-Si-Ti system. Such data collected in the thermodynamic database can be used for predicting the phase constitution states of a given composition for Fe-based hardfacing materials, which often use in energy industry in order to increase the abrasion and impact wear resistance of equipment parts. In order to compare theroretical calculation results with experimental data, four different types of hardfacing were deposited using flux-cored arc welding. Microstructure and chemical composition of deposited layers was investigated using optical and scanning electron microscopy together with energy dispersive X-ray spectroscopy. Comparison of experimental and computed results shows that they are in good agreement in meaning of presence of all-important phase equilibrium regions. The developed database can be used for rational selection of hardfacing materials for energy industry equipment and reasonable choice of new alloying systems.

The effect of a welding technology on the abrasive wear resistance of joints in abrasion-resistant plates

Szymura Michał, Czupryński Artur

Biuletyn Instytutu Spawalnictwa w Gliwicach

2020

Vol. 64, No. 5

49--60

The article presents results of tests concerning the metal-mineral abrasive wear resistance of butt welded joints with abrasion-resistance overlay weld HARDPLATE 100S 5+3 made using a covered electrode with the solid core and the flux core as well as a self-shielded flux-cored wire. The significance of the above-named effect was determined using a completely randomized design. The scope of tests also included the analysis of the chemical and phase compositions, hardness measurements as well as the macro and microscopic metallographic tests of welded joints in abrasion-resistant plates.

Przedstawiono wyniki badań odporności na zużywanie ścierne typu metal-minerał złączy doczołowych blach z napoiną trudno ścieralną HARDPLATE 100S 5+3 wykonanych elektrodą otuloną z rdzeniem litym i proszkowym oraz drutem proszkowym samoosłonowym. Istotność wpływu ustalono prowadząc badania przy zastosowaniu programu statycznego randomizowanego kompletnego. Zakres badań obejmował także analizę składu chemicznego i fazowego, pomiar twardości oraz badania metalograficzne makro- i mikroskopowe złączy płyt trudno ścieralnych.