Improved corrosive wear resistance of carbidic austempered ductile iron by addition of Cu

Yang, Penghui; Fu, Hanguang; Absi, Rafik; Bennacer, Rachid; Guo, Xingye

doi:10.1016/j.matchar.2020.110577

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…The hardness of diffusion coatings on cast iron cannot be greater than the load of their destruction 𝑃𝑃 𝑚𝑚𝑎𝑎𝑚𝑚 = 𝑃𝑃 𝑚𝑚𝑎𝑎𝑚𝑚 𝑎𝑎𝑎𝑎 . The load of destruction of an abrasive soil particle is [15] 𝑃𝑃…”

Section: Calculation Methodsmentioning

confidence: 99%

Investigation of the Strength of Diffusion Coatings on Cast Iron Friction Pairs in Contact with Hard Abrasive Soil Particles

Veselovsky¹,

Erofeev

Troyanovskaya

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Replacing steel parts with cast iron is a promising task for agricultural engineering. However, high-strength cast iron VCh 60, widely used in mechanical engineering and studied in this work, is inferior in abrasive resistance to steel parts that have undergone chemical-thermal and subsequent heat treatment. This disadvantage was eliminated by the formation of high-hard diffusion coatings with vanadium or chromium, by the method of saturation of their powders. But these coatings, despite their hardness, are brittle and lie on a softer base of cast iron. This paper estimates the minimum thickness of the above-mentioned coatings that can withstand the specified level of contact load without destruction when solid non-crushed soil particles or particles of other origin enter the interface. Based on the conducted research, the empirical dependences of the minimum thickness of the coating that can withstand a given level of load without destruction are derived from the size of the resulting imprint of the Vickers pyramid pressed into the surface. The graphs are convenient to use when designing gears and worm gears with a given contact load in the engagement, the part of the space located above the critical line 6 in the figures shown in the work is a safe area of coating thicknesses at the identified contact pressure.

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Section: Calculation Methodsmentioning

confidence: 99%

Investigation of the Strength of Diffusion Coatings on Cast Iron Friction Pairs in Contact with Hard Abrasive Soil Particles

Veselovsky¹,

Erofeev

Troyanovskaya

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Yang et al (2020) [ 40 ] studied varying Cu percentages mixed with carbidic austempered ductile iron (CADI) in order to increase corrosion resistance. They noticed that the morphology of CADI comprised graphite nodules and carbides, and the matrix comprised bainitic ferrite laths and retained austenite ( Figure 12 ).…”

Section: Effect Of Heat Treatment On Microstructure and Phase Evoluti...mentioning

confidence: 99%

“… Morphological structures of carbidic austempered ductile iron with varying Cu percentages: ( a ) 0 wt.% Cu, ( b ) 0.5 wt.% Cu, ( c ) 1 wt.% Cu, ( d ) 1.5 wt.% Cu, and ( e ) 2 wt.% Cu [ 40 ]. …”

Section: Figurementioning

confidence: 99%

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A Review on Heat Treatment of Cast Iron: Phase Evolution and Mechanical Characterization

et al. 2022

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The isothermal heat treatment process has been identified as a unique process of fabricating exceptional graphite cast iron due to its remarkable mechanical properties, such as excellent machinability, toughness, and high level of ultimate tensile strength. Austempered ductile iron (ADI), ductile iron (DI), and gray cast iron (GCI), known as spheroidal cast irons, are viable alternative materials compared to traditional steel casting, as well as aluminum casting. The graphite nodules from the microstructures of DI, ADI, and GCI are consistently encompassed by acicular ferrite and carbon-saturated austenite in the matrix, forming a distinctive ausferritic structure. All these materials are extensively used in the fabrication of engine sleeves, engine blocks, valves, gears, and camshafts in the automobile sector. With relative motion and outward loads, these components are regularly exposed to surface contact. In this project, it was observed that austempering temperature and a shorter holding period could also be used to manufacture needle-like ferrite platelets for austempered ductile iron (ADI) and other graphite cast irons. To overcome the brittleness challenges and catastrophic failures encountered by applied loads in present-day applications, it is essential to comprehend the isothermal treatments, morphological behaviors, phase analyses, processing techniques, and mechanical properties needed to properly incorporate these materials into future designs. This review article provides detailed information on the characterization and relevant potential mechanisms of ADI, DI, and GCI.

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“…However, the surfaces of rubbing parts after restoration of diffusion coatings have increased roughness. This contributes to the development of cavitation pitting [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Improving the Quality of Friction Surface by Applying Antifriction Materials to Them

Veselovsky¹,

Erofeev

Troyanovskaya

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The article investigated the process of applying antifriction coatings to the surface of hardened cast iron gear wheels. The diffusion coating of cast iron wheels with vanadium greatly strengthened the surface and increased its wear resistance. Aluminium, tin bronze and copper were used as antifriction materials. The coating was applied with metal brushes. The brushes tore off individual fragments of anti-friction metal particles and smeared them over the surface of the coated product. Research results have confirmed the acceptability of this method instead of expensive finishing operations that cannot be applied to diffusion-hardened gears due to the shallow depth of the vanadium coating. The proposed method is universal for all types of metal products operating under sliding friction conditions. Results are presented as spatial histograms.

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Improved corrosive wear resistance of carbidic austempered ductile iron by addition of Cu

Cited by 16 publications

References 22 publications

Investigation of the Strength of Diffusion Coatings on Cast Iron Friction Pairs in Contact with Hard Abrasive Soil Particles

Investigation of the Strength of Diffusion Coatings on Cast Iron Friction Pairs in Contact with Hard Abrasive Soil Particles

A Review on Heat Treatment of Cast Iron: Phase Evolution and Mechanical Characterization

Improving the Quality of Friction Surface by Applying Antifriction Materials to Them

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