The Laser Alloying Process of Ductile Cast Iron Surface with Titanium Powder in Nitrogen Atmosphere

Lont, Aleksandra; Górka, Jacek; Janicki, D.; Matus, Krzysztof

doi:10.3390/coatings12020227

Cited by 14 publications

(14 citation statements)

References 27 publications

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“…During the laser treatment, nitrogen from the atmosphere was absorbed into the surface layer. TiCN was also observed in the experiment when titanium was used as an alloying substance during the laser treatment of ductile cast iron [ 14 ]. Titanium nitrides are often formed in austenitic, corrosive, resistible steels during welding (containing titanium).…”

Section: Resultsmentioning

confidence: 99%

“…Hardness, wear resistance as well as corrosion resistance can be increased by applying an element or substance during laser processing and performing an alloying of the surface layer [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. One of the elements that can increase hardness and wear resistance is silicon.…”

Section: Introductionmentioning

confidence: 99%

“…Such a reaction between carbon and titanium was observed after the cast iron laser treatment and after plasma titanium spraying [ 23 ]. Titanium, as an alloying substance, has been also used in research on ductile iron [ 14 ]. An element such as cobalt can also be used in the case of laser surface modification.…”

Section: Introductionmentioning

confidence: 99%

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The Comparison of the Effects of Nodular Cast Iron Laser Alloying with Selected Substances

Paczkowska

2022

Materials

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The aim of this research was to compare the effects of laser treatment, with the same heating conditions, using four selected alloying substances (silicon, cobalt, silicon nitride and titanium), in the surface layer of nodular cast iron. The treatment was performed with a molecular laser. As the microstructure observation revealed, the greatest amount of implemented elements was diluted during the treatment in a solid solution. In all cases (except during the alloying process with cobalt), in the alloying zone, a fine and homogeneous microstructure was found. In the alloying zone, cobalt counteracted the formation of the martensitic microstructure so effectively that austenite turned into exclusively fine perlite (or bainite at most). The size of the obtained alloyed zone was different, despite the same laser heat treatment parameters. A 30% smaller depth of zone after laser alloying with silicon nitride, as compared with alloying with cobalt or silicon, was observed. The highest strengthening of the alloyed zone could be expected when silicon (hardness was approx. 980HV0.1 and the modulus of elasticity was 208 GPa) and titanium (hardness was approx. 880HV0.1 and the modulus of elasticity was 194 GPa) were used. The lowest hardness (700HV0.1) was observed for the zone alloyed with cobalt due to pearlite (or bainite) existence.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Comparison of the Effects of Nodular Cast Iron Laser Alloying with Selected Substances

Paczkowska

2022

Materials

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“…The improvement of erosion and tribological wear resistance of the surface entails the use of metal matrix composite (MMC) coatings or surface layers reinforced with ceramic particles [ 6 , 7 ]. The fabrication of composite coatings with the nickel-based superalloy matrix has a high application potential due to numerous advantageous properties combined with increased erosion and tribological wear resistance [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

The Structure and Properties of Laser-Cladded Inconel 625/TiC Composite Coatings

2023

Self Cite

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This article presents production results concerning metal matrix composite-coatings made using the laser-cladding technology. The enhancement of the wear resistance of the material surface is the one of the main goals accompanying the manufacturing of composite coatings. Nickel-based superalloys are used in several industries because they are characterized by a number of desirable properties including high tensile and fatigue strength as well as resistance to high-temperature corrosion in aggressive environments. One of the most interesting materials from the group of superalloys is Inconel 625, used as a matrix material in tests discussed in this article. However, nickel-based superalloys are also characterized by an insufficient wear resistance of the surface, therefore, in relation to the tests discussed in this article, Inconel 625-based composite coatings were reinforced by adding 10%, 20% and 40% of titanium carbide particles. The addition of hard phases, i.e., TiC, WC or SiC particles can have a positive effect on the erosion resistance of cladded specimens. The aim of the experiment was to determine the impact of the titanium carbide content on the structure of the alloy and its resistance to corrosive wear, enabling the extension of the service life of Inconel 625/TiC composite coatings. The investigation included microhardness tests, corrosion resistance analysis, penetrant tests, macrostructure and microstructure analyses and X-ray diffraction (XRD) tests. The TiC particles increased the hardness of the coatings and, in general, had a negative impact on the corrosion resistance of pure Inconel 625 coatings. However, the increased homogeneity of composite coatings translated into the improvement of corrosion resistance.

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“…Deliberately increasing the N content in cast irons is done using nitrogen alloys and salts in order to increase (tensile strength -Rm and hardness -HB). On the other hand, the increased content of N in the liquid metal is the source of bubbles in the castings [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Quality of Cast Iron Made from Steel Scrap and Possibilities of its Improvement

Futáš¹,

Pribulová²,

Petrík³

et al. 2022

Preprint

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In the field of metallurgy, there are many factors that influence the final quality of cast iron. These are mainly charge materials, chemical composition, metallurgical preparation up to the final casting process. Even small deviations from metallurgical processing lead to fluctuations in melt quality and the occurrence of casting defects. Charge materials has a significant impact on the quality of cast iron, especially steel scrap, which is increasingly used from an economic and ecological point of view, especially when melting cast iron in electric furnaces. Cast iron produced from a higher proportion of steel scrap in the charge has higher hardness and tensile strength. On the other side, these cast irons has a higher tendency to chillout, brittleness, shrinkage, pearlitic microstructure, stresses and higher purity due to the difference in hardness at different wall thicknesses of the castings. It is the high hardness that is the problem in the final machining of castings. These negative properties are recorded mainly in heavy thick-walled castings with higher tensile strength and hardness. This negative effect is mainly due to the nitrogen content in the steel scrap. Based on these knowledges, operating melts were realized in the foundry's operating conditions. The influence of steel scrap in the charge and the possibility of eliminating its negative effects on the properties of cast iron were investigated.

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The Laser Alloying Process of Ductile Cast Iron Surface with Titanium Powder in Nitrogen Atmosphere

Cited by 14 publications

References 27 publications

The Comparison of the Effects of Nodular Cast Iron Laser Alloying with Selected Substances

The Comparison of the Effects of Nodular Cast Iron Laser Alloying with Selected Substances

The Structure and Properties of Laser-Cladded Inconel 625/TiC Composite Coatings

Metallurgical Quality of Cast Iron Made from Steel Scrap and Possibilities of its Improvement

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