Elevated-temperature mechanical properties of sintered iron-base materials containing calcium fluoride additions

Fedorchenko, I. M.; Shevchuk, Yu. F.; Miroshnikov, V. N.; Borisenko, V. A.

doi:10.1007/bf00806537

Cited by 10 publications

(4 citation statements)

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“…The materials have excellent antipeeling properties and can perform at high temperatures in the extremely heavy mode [9][10][11]. For example, the Fe-15 Mo-6 CaF 2 material [10] is used for a hightemperature sliding bearing for bell-less top charger of the 2000 m 3 blast furnace at the Krivorozhstal Plant.…”

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confidence: 99%

Sintered antifriction materials

Косторнов

Фущич

2007

Powder Metall Met Ceram

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621.762Some classes of sintered antifriction materials that form the basis for the development of new materials are discussed. Metal-and nonmetal-based materials with high wear resistance, low friction coefficient, and maximum lifetime are described. They differ in composition, structure (microheterogeneous, macroheterogeneous, layered, fibrous), carrying capacity, and potential for operation under various loads, at sliding rates, and in various conditions (high and low temperatures, corrosive and aggressive media, i.e., in water, acids, alkalis, melted metals, burning-hot gases, with and without lubrication, under high vacuum), in different friction modes (light, medium, heavy, and extremely heavy). The above materials are intended for application in the aviation, motorcar, chemical, oil, metallurgical, transportation, nuclear, textile, and food industries, in cryogenic, rocket, missile, and turbine engineering.The general advance in mechanical engineering, transportation, communications, and other industries, associated with higher rates, pressure, power, operating temperatures of machines and mechanisms, and in space, nuclear, and cryogenic engineering are impossible without new materials. Of them, antifriction materials with high wear resistance, low friction coefficient, and maximum lifetime hold the lead. They are used to produce sliding bearings (cylindrical and ball bearings, thrust bearings, inserts, guides, end and side seals, etc.) for friction units of most contemporary machines and mechanisms.Along with conventional cast antifriction materials, sintered powder materials are taking a leading role since they are long-run, can be operated in various conditions, and their mechanical and tribotechnical properties and economic indicators often surpass those of cast alloys. The long-term experience of applying sintered antifriction materials in various engineering areas shows that they increase the wear resistance of friction units by a factor of 1.5 to 3.0 as compared with cast materials, lubricant supply being limited.Powder metallurgy methods make it possible to produce materials from components that have different melting temperatures or show liquid immiscibility, to obtain a homogenous material of desired porosity, to control the grain size by varying the reduction ratio of the initial components, and to develop composites by combining a high-strength component (which has high fracture toughness under friction and forms the load-bearing matrix of the material) and antifriction components (which form secondary structures on rubbing surfaces to prevent seizure). These methods result in sintered antifriction materials with ample solid and liquid lubricants of virtually any structure, composition, and

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confidence: 99%

Sintered antifriction materials

Косторнов

Фущич

2007

Powder Metall Met Ceram

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“…Also, more necking has been observed at 5% clay resulted in reduced crushing strength. The crushing strength of composite 2 has been found improved compared to composite 1 due to addition of nickel and molybdenum which results in formation of the Cu-Mo-Ni ternary alloy [33][34].…”

Section: Effect Of Wt % Of Clay On Crushing Strength (Kn)mentioning

confidence: 98%

“…The porosity at 1% clay has been found to be little higher compared to composite 1 due to formation of Cu-Ni-Mo ternary alloys [32]. The porosity range was observed as 11.63%-15.54% which has better than the porosity range of 28-30% observed in mineral calcium uoride addition in iron alloy [33].…”

Section: Effect Of Wt % Of Clay On Density and Porosity Assessmentmentioning

confidence: 99%

“…The hardness 75 HRB to 67 HRB of composite 2 has been observed high compared to composite 1. As the nickel and molybdenum increases several properties like high interatomic bonding force at room temperature and high temperature, high melting point, excellent thermal conductivity, good electrical conductivity and corrosion resistance, and hardness due to formation of the Cu-Mo-Ni ternary alloy, the improved the properties has been observed in composite 2 [33][34].…”

Section: Effect Of Wt % Of Clay On Hardness (Hrb)mentioning

confidence: 99%

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An influence of Nano particles of bentonite clay on mechanical properties of ferrous clay composite through additive manufacturing route

Bhosale¹,

Bhowmik²,

Ray³

2022

Preprint

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The powder metallurgy (P/M) components have been extensively used in industrial applications and P/M components properties has been influenced by alloying elements and porosity. In the present work, the bentonite clay (aluminum silicate) as porosity filler has been mixed in the ferrous alloy for manufacturing of low porosity P/M components. The specimens have been manufactured by using iron-carbon-copper and iron-carbon-copper-nickel- molybdenum with bentonite clay. The bentonite clay has varied with wt. % of 1–5% at the interval of 1%. To recognize the effect of bentonite clay, the mechanical properties such as density and porosity have measured and the crushing strength, and hardness test has carried out. Also, microstructure analysis has been carried out by optical microstructure study and scanning electron microscopy (SEM). Further the X-ray diffraction (XRD) and Energy Dispersive Spectrometry (EDS) analysis has been carried out for clay particles location and homogeneous mixing. The micro-structure and chemical composition analysis shows that the clay remains at grain boundary. The test results shows that the porosity has significantly reduced while, slightly reduction has been found in density, hardness and crushing strength with an increase in wt. % of clay. This analysis show that the 1% of Nano-particles of bentonite clay is helpful as porosity fillers with acceptable mechanical properties.

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