Formation of coatings resistant to contact impact loading by various borochromizing methods

Kolesnikov, Yu. V.; Anan'evskii, V. A.; Govorov, I. V.

doi:10.1007/bf00727936

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The resulting layer, despite its good properties, can show cracking in the subsurface zone. Many scientists attempt to counteract this unfavorable phenomenon by introducing additional elements such as chromium or copper [ 10 , 11 , 12 , 13 , 14 , 15 ] in order to reduce brittleness. Laser modification is also used for this purpose [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Bartkowska¹

2021

Materials

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The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Bartkowska¹

2021

Materials

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Corrosion Behavior of Boronized and Borochromized AISI 4140 Steel After Acid Exposure Evaluated by Electrochemical Impedance Spectroscopy

Zagkliveris

Mavropoulos

Triantafyllidis

2023

J. of Materi Eng and Perform

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Boronizing of steel is a widely used method for superficial protection and strengthening of various components. Although it is an effective solution for most applications, it can be improved by adding metallic elements to enrich the coating with mixed borides that have exceptional properties. In the present study, we investigated the actual upgrade of a boronized AISI 4140 steel after an additional chromizing process in terms of corrosion resistance. Samples of boronized and borochromized steel were immersed in 10% vol. HCl or H2SO4 solutions for 0.5-4 h and assessed with Electrochemical Impedance Spectroscopy. It is shown by the results that the borochromized specimens started with higher impedance values than the boronized ones, but they gradually degraded by immersion time and tended to approach the values of the boronized specimens, a fact attributed to the weakening of the resistance of the coating due to the corrosion. On the contrary, the boronized samples showed lower but stable values of impedance. The porosity of the boronized specimens did not contribute to their total impedance, as deduced by equivalent electrical circuit analysis. The impedance of the bulk region of both coatings did not decrease significantly during the corrosion. XRD and SEM/EDS measurements supported our findings.

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Laser production of B–Ni complex layers

Bartkowska

Pertek

2014

Surface and Coatings Technology

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Formation of coatings resistant to contact impact loading by various borochromizing methods

Cited by 3 publications

References 2 publications

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Corrosion Behavior of Boronized and Borochromized AISI 4140 Steel After Acid Exposure Evaluated by Electrochemical Impedance Spectroscopy

Laser production of B–Ni complex layers

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