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Effect of Corrosion on Wear Resistance of the Composite Based on GX120Mn13 Cast Steel Zonally Reinforced with Particles (Al2O3+ZrO2)

Daniel Medyński
Archives of Foundry Engineering | 2023 | vol. 23 | No 3 | 133-139 | DOI: 10.24425/afe.2023.146675
Keywords abrasive wear cast steels ceramics composites corrosion
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Abstract

The subject of the work are modern composite materials with increased wear resistance intended for elements of machines operating in difficult conditions in the construction and mining industries. The study determined the effect of zone reinforcement of GX120Mn13 cast steel with macroparticles (Al 2O 3+ZrO 2) on the corrosion resistance and abrasion wear of the composite thus obtained. SEM studies have shown that at interface between two phases, and more precisely on the surface of particles (Al 2O 3+ZrO 2) a durable diffusion layers are formed. During the corrosion tests, no significant differences were found between the obtained parameters defining the corrosion processes of GX120Mn13 cast steel and GX120Mn13 with particles (Al 2O 3+ZrO 2) composite. No intergranular corrosion was observed in the matrix of the composite material, nor traces of pitting corrosion at both phases interface. This is very important in terms of tested material’s service life. Reinforcement of cast steel with particles (Al 2O 3+ZrO 2) resulted in a very significant improvement in the abrasion resistance of the composite – by about 70%. After corrosion tests, both materials were subjected to further operational investigations. These examinations consisted in determining the impact of corrosion processes on the durability of the composite in terms of abrasion. The obtained results indicate that corrosion processes did not significantly deteriorate the wear resistance of both the cast steel and the composite.
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Bibliography

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Authors and Affiliations

Daniel Medyński
1
ORCID: ORCID
  1. Witelon Collegium State University, Poland

Effect of Cr, Mo and Al on Structure and Selected Mechanical Properties of Austenitic Cast Iron

Daniel Medyński A. Janus
Archives of Foundry Engineering | 2019 | vol. 19 | No 4 | 39-44 | DOI: 10.24425/afe.2019.129627
Keywords Austenitic cast iron Austenite transformation Heat treatment Nickel equivalent Mechanical properties of cast iron
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Abstract

Results of a research on influence of chromium, molybdenum and aluminium on structure and selected mechanical properties of Ni-Mn-Cu cast iron in the as-cast and heat-treated conditions are presented. All raw castings showed austenitic matrix with relatively low hardness, making the material machinable. Additions of chromium and molybdenum resulted in higher inclination to hard spots. However, a small addition of aluminium slightly limited this tendency. Heat treatment consisting in soaking the castings at 500 °C for 4 h resulted in partial transformation of austenite to acicular, carbon-supersaturated ferrite, similar to the bainitic ferrite. A degree of this transformation depended not only on the nickel equivalent value (its lower value resulted in higher transformation degree), but also on concentrations of Cr and Mo (transformation degree increased with increasing total concentration of both elements). The castings with the highest hard spots degree showed the highest hardness, while hardness increase, caused by heat treatment, was the largest in the castings with the highest austenite transformation degree. Addition of Cr and Mo resulted in lower thermodynamic stability of austenite, so it appeared a favourable solution. For this reason, the castings containing the highest total amount of Cr and Mo with an addition of 0.4% Al (to reduce hard spots tendency) showed the highest tensile strength.

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Authors and Affiliations

Daniel Medyński
ORCID: ORCID
A. Janus

Microsegregation of Elements in Steel Composite Reinforced with Ceramic

Daniel Medyński A.J. Janus
Archives of Foundry Engineering | 2021 | vo. 21 | No 1 | 63-66 | DOI: 10.24425/afe.2021.136079
Keywords Composite materials Cast reinforced Cast steel Ceramic materials Abrasive wear
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Abstract

The paper presents results of research on steel castings GX120Mn13 (L120G13 by PN-89/H-83160), zone-reinforced by elektrocorundum particles (Al2O3), with a grain size from 2 to 3.5 mm. Studies revealed continuity at interface between composite components and formation of a diffusion zone in the surface layer of electrocorundum grains. In the area of this zone, simple manganese segregation and reverse iron and chromium segregation were found. The transfer of these elements from cast steel to electrocorundum grains resulted superficial depletion in aluminum and oxygen in this area. No porosity was observed at the interface between two components of the composite. We found it very beneficial from an exploitation point of view, as confirmed by the study of resistance to abrasive wear.
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Bibliography

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Authors and Affiliations

Daniel Medyński
ORCID: ORCID
A.J. Janus
1
  1. Witelon State University of Applied Science in Legnica ul. Sejmowa 5A, 59 – 220 Legnica, Poland

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