Sliding wear characteristics of molybdenum containing Stellite 12 coating at elevated temperatures

Motallebzadeh, Amir; Atar, Erdem; Çi̇menoǧlu, Hüseyin

doi:10.1016/j.triboint.2015.06.006

Cited by 65 publications

(34 citation statements)

References 43 publications

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“…The oxide layer can be utilized as a lubricant. Motallebzadeh et al reported that the wear mechanisms of Stellite 12 alloy are plasticity at 300°C and oxidative wear at 700°C [ 33 ]. The friction coefficient at 300°C is lower than that at room temperature, which coincided with the results of wear rate shown in Figure 5 .…”

Section: Resultsmentioning

confidence: 99%

Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

et al. 2017

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The microstructure and wear resistance of Stellite 6 alloy hardfacing layer at two different temperatures (room temperature and 300°C) were investigated by plasma arc surfacing processes on Q235 Steel. Tribological test was conducted to characterize the wear property. The microstructure of Stellite 6 alloy coating mainly consists of α-Co and (Cr, Fe)7C3 phases. The friction coefficient of Stellite 6 alloys fluctuates slightly under different loads at 300°C. The oxide layer is formed on the coating surface and serves as a special lubricant during the wear test. Abrasive wear is the dominant mechanism at room temperature, and microploughing and plasticity are the key wear mechanisms at 300°C.

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Section: Resultsmentioning

confidence: 99%

Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

et al. 2017

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“…As a kind of cemented carbide, Co-based alloys have excellent wear resistance, thermal fatigue resistance, and corrosion resistance [1][2][3][4]. Stellite 6 alloy is a typical Co-based alloy, and is widely used under extremely corrosive and wearing conditions, such as the aero engine, industrial gas turbine, and nuclear industries [5,6].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Cui

Wang³

et al. 2019

Metals

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Stellite 6 alloy has excellent wear resistance, corrosion resistance, and oxidation resistance, however the difficulties in traditional processing limit its wide application. Additive manufacturing technology that has emerged in recent years is expected to provide a new way for the processing of stellite 6 alloy. In this study, two square thin-walled stellite 6 parts were fabricated through the wire arc additive manufacturing technology. At the same time, the effect of stress relief annealing on the mechanical performance of the fabricated stellite 6 part was studied and compared with the corresponding casting part. The results indicate that the additive manufacturing stellite 6 components exhibit satisfactory quality and appearance. Moreover, the microstructure of the additive manufacturing part is much finer than that of the casting part. From the substrate to the top region of the additive manufacturing part, the morphology of the dendrites changes from columnar to equiaxed, and the hardness increases firstly and then decreases gradually. In addition, the average hardness of the additive manufacturing part is ~7–8 HRC higher than the casting part. The ultimate tensile strength and yield strength is ~150MPa higher than the casting part, while the elongation is almost the same. The stress relief annealing has no significant effect on the hardness of the AM part, but it can slightly improve the strength.

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“…Therefore, this alloy is generally employed in the form of coating in order to protect different metallic substrates like stainless steels and superalloys against corrosion and wear particularly at elevated temperatures (Ref 5). Stellite 6 coatings have extensive applications in aerospace and automotive industries (coatings on gas turbines and exhaust parts), petroleum industries (coatings on gate valves and drilling components), energy conversion industries (coatings on boilers and turbines), etc (Ref [6][7][8][9][10]. Various thermal spray techniques such as atmospheric plasma spraying (APS) and high velocity oxygen fuel (HVOF) have been utilized to deposit Stellite 6 alloy, but the as-sprayed coatings suffer from several drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Treatment of Stellite 6 Coating Deposited by HVOF on 316L Alloy

Razavi

2016

J. of Materi Eng and Perform

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This research aimed to study the effects of laser glazing treatment on microstructure, hardness, and oxidation behavior of Stellite 6 coating deposited by high velocity oxygen fuel (HVOF) spraying. The assprayed Stellite 6 coating (ST-HVOF) was subjected to single-pass and multiple-pass laser treatments to achieve the optimum glazing parameters. Microstructural characterizations were performed by x-ray diffractometry and field emission scanning electron microscopy equipped with energy-dispersive spectroscopy. Two-step optimization showed that laser treatment at the power of 200 W with a scan rate of 4 mm/s causes a surface layer with a thickness of 208 ± 32 lm to be remelted, while the underlying layers retain the original ST-HVOF coating structure. The obtained sample (ST-Glazing) exhibited a highly dense and uniform structure with an extremely low porosity of $0.3%, much lower than that of ST-HVOF coating (2.3%). The average microhardness of ST-Glazing was measured to be 519 Hv 0.3 indicating a 17% decrease compared to ST-HVOF (625 Hv 0.3 ) due to the residual stress relief and dendrite coarsening from submicron size to $3.4 lm after laser treatment. The lowest oxidation mass gain was obtained for STGlazing by 2 mg/cm 2 after 8 cycles at 900°C indicating 52 and 84% improvement in oxidation resistance in comparison to ST-HVOF and bare 316L steel substrates, respectively.

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Sliding wear characteristics of molybdenum containing Stellite 12 coating at elevated temperatures

Cited by 65 publications

References 43 publications

Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Laser Surface Treatment of Stellite 6 Coating Deposited by HVOF on 316L Alloy

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