Archives of Metallurgy and Materials

Suliga, M.; Wartacz, Radosław

doi:10.24425/amm.2019.130093

2019

DOI: 10.24425/amm.2019.130093

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Archives of Metallurgy and Materials

M. Suliga

Radosław Wartacz

Abstract: The paper discusses experimental studies to determine the effect of the die working portion angle on the lubrication conditions, zinc coating thickness and the mechanical properties of medium-carbon steel wires. The test material was 5.5 mm-diameter wire rod which was drawn into 2.2 mm-diameter wire in seven draws at a drawing speed of v = 10 m/s. Conventional drawing dies of a working portion angle of α = 3, 4, 5, 6, 7°, respectively, were used for the drawing process. After the drawing process, the quantity … Show more

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Cited by 8 publications

References 9 publications

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Evolution of zinc coatings during drawing process of steel wires

Suliga

Wartacz²,

Hawryluk

2023

Archiv.Civ.Mech.Eng

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The paper shows a significant influence of the multi-stage wire drawing technology on deformability and phase transformations in the zinc coating. SEM tests proved that the coating after hot-dip galvanizing consists of a number of thin layers, ranging from 1 to 5 µm, and differing in thickness, chemical composition and properties. When pulled through the drawing die the zinc coating heats up (as a result of friction between the material and the tool) and its dynamic plastic deformation. It resulted in the fracture and partial crushing of the hard-intermetallic phases. It has been proven that as the wire passes through successive drawing dies, the coating is thinned and diffusion as well as phase remodelling of individual structural components occurs; in the place of phase ζ, the intermetallic phase δ1 develops, increasing its share in the diffusion layer. The crystals of intermetallic phases located on the border of the diffusion and outer layers break up and remain dispersed in the zinc. An analysis of the microhardness of the coating has proven that the level of the increase in the microhardness of the zinc coating is contingent on percentage of iron in particular layers of coating.

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Evolution of zinc coatings during drawing process of steel wires

Suliga

Wartacz²,

Hawryluk

2023

Archiv.Civ.Mech.Eng

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Influence of the drawing process on corrosion behaviour of hot-dip galvanised wires

Suliga

Wartacz²,

Hawryluk

2023

Materials Science and Technology

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The phenomenon of corrosion on wires and springs covered with an anti-corrosive zinc coating was investigated. To assess the corrosion resistance of galvanised wires, tests were carried out in the standard neutral salt spray corrosion test and in the sulphur dioxide test with general moisture condensation. The spring corrosion process depends on the wire drawing technology. The research showed that the higher the drawing speed and angle, the more dynamic the corrosion development.

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Structure and Corrosion Resistance of Coatings Obtained by the Batch Double Hot Dip Method in Eutectoid ZnAl Bath with the Addition of Mg and Si

Kania

2022

Coatings

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The article presents the results of the research determining the synergistic effect of Mg and Si additives in the ZnAl23 bath on the microstructure (SEM), growth kinetics, and corrosion resistance of coatings obtained by the batch double hot dip method. On the basis of the research on the chemical composition in micro-regions (EDS) and the research on the phase composition (XRD), the structural components of the coatings with a content of 3 and 6 wt.% Mg and 0.2–0.4 wt.% Si were identified. The corrosion resistance of the coatings was compared with that of the reference coating obtained in the ZnAl23Si0.4 bath in the neutral salt spray test (EN ISO 9227), and the test with sulfur dioxide in a humid atmosphere (EN ISO 6988). The parameters of electrochemical corrosion of the coatings were determined. This allowed for the conclusion that the addition of Mg and Si to the ZnAl23 bath improved the microstructural uniformity of the coating. In the area of the diffusion layer, the presence of the FeAl3 intermetallic phase was found, while in the outer layer the dendrite of the Al-rich solution with interdendritic spaces, where it locates areas of Zn-rich solution, eutectic Zn/MgZn2 or phase separation MgZn2 and Mg2Si are located. Additions of Mg and Si stabilize the kinetics of the coating’s growth, and its course is parabolic. The conducted corrosion tests showed better corrosion resistance of the coatings obtained in the bath with Mg addition compared to the reference coating obtained in the ZnAl23Si bath. The increase in corrosion resistance results from the presence of a more anodic MgZn2 phase, which, however, may be weakened by the presence of Mg2Si phase precipitates.

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Archives of Metallurgy and Materials

Cited by 8 publications

References 9 publications

Evolution of zinc coatings during drawing process of steel wires

Evolution of zinc coatings during drawing process of steel wires

Influence of the drawing process on corrosion behaviour of hot-dip galvanised wires

Structure and Corrosion Resistance of Coatings Obtained by the Batch Double Hot Dip Method in Eutectoid ZnAl Bath with the Addition of Mg and Si

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