Characterisation of different lubricants concerning the friction coefficient in forging of AA2618

Buchner, Bernhard; Maderthoner, Gerhard; Buchmayr, Bruno

doi:10.1016/j.jmatprotec.2007.06.057

Cited by 18 publications

(8 citation statements)

References 6 publications

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“…The results were compared to the results of a previous study [4] employing a pin-on-disc test for lubricant evaluation, and good qualitative agreement was found in terms of friction coefficient and friction evolution during the tests.…”

Section: Discussionmentioning

confidence: 76%

Investigation of friction in warm forging of AA6082

2008

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This paper presents an experimental investigation of friction in hot forging of AA6082, which is a standard forging alloy in automotive engineering, mechanical engineering and in naval architecture, by employing a modified ring-on-disc test. The experiments were performed with three different commercial graphite-based lubricants and at various loads, sliding velocities and specimen surface conditions. In addition, some tests were performed without lubrication.

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Section: Discussionmentioning

confidence: 76%

Investigation of friction in warm forging of AA6082

2008

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“…The authors concluded that the film thickness in the flash zone and particle size affected the friction and wear behavior. Buchner et al examined the tribological performance of four aluminum forging (graphitebased) lubricants by using the rotational forging tribometer in the temperature range of 250-450 °C [60]. Each lubricant provided ranges of friction coefficient under different conditions, which one could select to fit certain condition.…”

Section: Tribological Effect Of Lubricants At Elevated Temperaturesmentioning

confidence: 99%

“…Buchner et al evaluated the behaviors of different lubricants used in hot forging (250-450 °C ) of aluminum by using the rotational forging test as shown in Fig. 25 [60]. In this test, the specimen was mounted on a rotary disc, compressed by the tool, and the frictional torque was measured.…”

Section: Friction 3(1): 1-27 (2015)mentioning

confidence: 99%

Tribology in metal forming at elevated temperatures

et al. 2015

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Abstract:The tribo-characteristics of metal forming at high temperatures have not yet been well understood due to the complex nature of thermal, microstructural, interaction, and process parameters. This is a review paper on the effects of temperature, coating, and lubrication to the tribological characteristics in hot forming as well as the tribometers for different metal forming processes at elevated temperatures mainly based on the experimental work. The tribological behaviors of oxides in hot forming, such as rolling and stamping, were reviewed and presented. Some commonly used surface coatings and lubricants in hot forming were given. Many types of tribometer were selected and presented and some of them provided a great potential to characterize friction and wear at elevated temperatures. Nevertheless, more testing conditions should be further investigated by developing new tribometers. Eventually, experimental results obtained from reliable tribometers could be used in theory and model developments for different forming processes and materials at high temperatures. The review also showed the great potential in further investigations and innovation in tribology.

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“…In forging operations, graphite-based lubricants, for having lower cost and great resistance to high pressures and temperatures, are the most common, being employed in approximately 80% of the forges. These lubricants are historically composed by an oilbased graphite emulsion and, more recently, by water-based graphite particle suspensions [12].…”

Section: Introductionmentioning

confidence: 99%

Treatment of a forging industry graphite-rich wastewater and sludge characterization

Reckziegel¹,

Thiesen²,

Osório³

et al. 2018

Desalination and Water Treatment

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Forging is a manufacturing process involving the shaping of metal using localized compressive forces. It is necessary to apply a lubricant, in many cases composed by graphite, and the process generate a wastewater that requires a proper treatment. The objective of this study was to evaluate the efficiency of the treatment of such effluent and characterize the sludge generated at a forging industry that recently changed in industrial process the oil-based lubricant by water-based lubricants. Initially, wastewater was treated by coagulation/flocculation with poly-aluminum chloride and a cationic flocculant. The treatment substantially reduced the pollutants load, exceeding in 90% the efficiency for most parameters assessed. The sludge generated in the wastewater treatment plant was characterized in terms of its microstructure, particle size distribution, chemical and mineralogical composition, and immediate analysis in terms of a solid energetic material. The sludge is composed mainly by graphite particles and, after dehydration, resulted in a material with possibilities for safe discharge, recycling or reuse. Considering the amount of sludge generated and the regional context, one possibility for destination is as energetic material for electric power generation.

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Characterisation of different lubricants concerning the friction coefficient in forging of AA2618

Cited by 18 publications

References 6 publications

Investigation of friction in warm forging of AA6082

Investigation of friction in warm forging of AA6082

Tribology in metal forming at elevated temperatures

Treatment of a forging industry graphite-rich wastewater and sludge characterization

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