Improvement of wear resistance for C45 steel using plasma nitriding, nitrocarburizing and nitriding/ manganese phosphating duplex treatment

Doan, Thanh Van; Kusmič, David; Pospíchal, Miroslav; Dobrocký, David

doi:10.1088/1757-899x/179/1/012017

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…[47,48] Plasma-nitrided AISI D2 steel shows a good wear resistance due to the optimal precipitates mainly recognized in c¢-Fe 4 N, this is reported to be very effective to improve the wear properties. [49,50] The HAPC 1+ plasma-nitriding coating is shown to have higher wear resistance due to the huge precipitation of hard Si 3 N 4 silicides. These silicides result excellent for the further increase in wear resistance and are responsible for the remarkable decrease of the friction coefficient (Figure 13, the fitting curve for the friction coefficient is shown in red).…”

Section: Siliconizing Coatingmentioning

confidence: 99%

Characterization of Tribological and Mechanical Properties of the Si3N4 Coating Fabricated by Duplex Surface Treatment of Pack Siliconizing and Plasma Nitriding on AISI D2 Tool Steel

Najafizadeh

Ghasempour-Mouziraji

Sadeghi

et al. 2021

Metall Mater Trans A

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Silicon nitride (Si3N4) coating was deposited on AISI D2 tool steel through employing duplex surface treatments—pack siliconizing followed by plasma nitriding. Pack cementation was performed at 650 °C, 800 °C, and 950 °C for 2 and 3 hours by using various mixtures to realize the silicon coating. X-ray diffraction analyses and scanning electron microscopy observations were employed for demonstrating the optimal process conditions leading to high coating adhesion, uniform thickness, and composition. The optimized conditions belonging to siliconizing were employed to produce samples to be further processed via plasma nitriding. This treatment was performed with a gas mixture of 75 pct H2-25 pct N2, at the temperature of 550 °C for 7 hours. The results showed that different nitride phases such as Si3N4-β, Si3N4-γ, Fe4N, and Fe3N can be recognized as coatings reinforcements. It was demonstrated that the described composite coating procedure allowed to obtain a remarkable increase in hardness (80 pct higher with respect to the substrate) and wear resistance (30 pct decrease of weight loss) of the tool steel.

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Section: Siliconizing Coatingmentioning

confidence: 99%

Characterization of Tribological and Mechanical Properties of the Si3N4 Coating Fabricated by Duplex Surface Treatment of Pack Siliconizing and Plasma Nitriding on AISI D2 Tool Steel

Najafizadeh

Ghasempour-Mouziraji

Sadeghi

et al. 2021

Metall Mater Trans A

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“…The maximum values of the hardness measured in a vicinity of the surface oscillated around 720 HV. In the literature, an increase of the microhardness in the surface layer is associated with an increase of the wear-resistance [20]. Thus, it is possible to assume the wear-resistance enhancement by application of the plasma nitriding.…”

Section: Microhardness Measurementmentioning

confidence: 99%

wear resistance enhancement of Case-hardening steels by utilizing plasma nitriding in military applications

Procházka

Studeny

Nguyen

2021

METAL 2021 Conference Proeedings

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“…Previous studies have shown that a microstructure layer formed on the surface of the substrate after this treatment substantially influences surface roughness, corrosion resistance and wettability (Cheng et al, 2006;Xu et al, 2009;Li et al, 2010). Currently, black phosphating processes such as zinc series phosphating and manganese series phosphating have been used in engines to promote wear resistance (Doan et al, 2017;Jian and Hongwei, 2016). Because of the complex processes involved with phosphating and water pollution issues, several researchers prefer organic phosphating, which is the phosphating of metal substrates with organic solvents as base liquids and phosphate esters or phosphates as film-forming agents (Carpenter, 2010).…”

Section: Introductionmentioning

confidence: 99%

Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

Liu³

et al. 2021

ILT

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Purpose Copper-graphite (Cu/C) is a type of seal material that has been widely used in liquid rocket engines and with normal metal pairs, has a high wear rate under liquid oxygen lubrication. In this study, bearing steel disks were subjected to a high-temperature oxidization and phosphating progress to create an oxidized tricresyl phosphating film (OTCP) film, using tricresyl phosphate (TCP) as the phosphating solvent. It is hoped that the surface wear rate and friction coefficient can be reduced by this method. Design/methodology/approach This study aim to form an anti-wear film on the surface of bearing steel, which can significantly improve the lubrication performance of Cu/C and bearing steel. The surfaces of bearing steel disks were dried to remove surface water and then put on a heating plate with a magnetic stirrer and a blue glazed oxide film obtained by heating the disks in the air at 200°C for 1 h. To create the OTCP film, bearing steel disks with a blue glazed oxide film were cleaned ultrasonically three times in ethanol and then placed in baths of TCP. After heating for 2 h at 120°C, excess TCP liquid was removed from the disks using ethanol, leaving an OTCP film on the disk surface. Findings It was found that steel coated with an OTCP film demonstrated better tribological performance (lower coefficient of fiction and wear rate) when pairing with Cu/C than either oxidized or untreated bearing steel. Additional chemical reactions occur when the oxide disk is immersed in TCP and the FePO4 film is formed after heating. Additionally, the OTCP film coated steel displayed good corrosion resistance, as confirmed by electrochemical corrosion tests. This finding demonstrates the potential for this process in the aerospace industry. Originality/value The preparation of OTCP films via high-temperature oxidization and phosphating of bearing steel was demonstrated, with the tribological properties of the OTCP film being investigated alongside those of the original surface and an oxidized film surface. The fabrication of OTCP films is easily scaled up and exhibits significant advantages as a new technology for applications in mechanical contact seal lubrication.

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Improvement of wear resistance for C45 steel using plasma nitriding, nitrocarburizing and nitriding/ manganese phosphating duplex treatment

Cited by 5 publications

References 3 publications

Characterization of Tribological and Mechanical Properties of the Si3N4 Coating Fabricated by Duplex Surface Treatment of Pack Siliconizing and Plasma Nitriding on AISI D2 Tool Steel

Characterization of Tribological and Mechanical Properties of the Si3N4 Coating Fabricated by Duplex Surface Treatment of Pack Siliconizing and Plasma Nitriding on AISI D2 Tool Steel

wear resistance enhancement of Case-hardening steels by utilizing plasma nitriding in military applications

Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

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