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Chip control in turning with lowEntering angle in SAF-2205 and SS-2541 stainless steel
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
2020 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Spånkontroll i svängning med låg ingångsvinkel i SAF-2205 och SS-2541 rostfritt stål (Swedish)
Abstract [en]

Machining is recognized as one of the essential manufacturing processes. Over the last few years, through the study of machining processes, the growth of the most advanced cutting materials, tool design, and tool geometries has led to a significant improvement in machining performance and productivity. Turning is one of the most widely used machining processes for the manufacture of cylindrical components. In turning operations of stainless steel, the formation of unbroken chips poses the main obstacle to maintain stable machining processes. Due to the continuous chip formation, this negatively affects the workpiece surface finish and causes risks to the operator. Stainless steels are identified initially for their excellent mechanical properties like corrosion resistance, high strength, ductility, etc., and used in various advanced applications in fields of automotive, aerospace, construction materials, etc. This research work is focused on investigating the influence of low entering and inclination angle on-chip curl in the machining of SS-2541 and SAF-2205 duplex stainless steel. Various experiments were conducted to see the effect of cutting speed, feed rate, and depth of cut on chip morphology and tool chip contact con-ditions. The influence of low entering angles and inclination angles on chip curl (chip up curl and chip side curl) in oblique turning for different feed rate, depth of cut, and cutting speed is studied using an experimental approach. Machining was carried out, and the chips are distinguished using combined Analysis of high-speed videography and the Kharkevich math-ematical model used to describe chip curl. The result obtained from the experiment shows that Chip side flow angle increases with low entering angle (15°, 25°) as well as broken chips are formed, which favours stable machining process whereas, chip side flow angle decreases with a large entering angle (35°) leading to unbroken chips. Further studies to understand the influence of microstructure and mechanical properties of material SAF-2205 and SS-2541 on chip formation are to be carried out.

Place, publisher, year, edition, pages
2020. , p. 42
Keywords [en]
chip flow, angle, chip up curl, chip side curl
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hv:diva-16146Local ID: EXM902OAI: oai:DiVA.org:hv-16146DiVA, id: diva2:1512031
Subject / course
Mechanical engineering
Educational program
Masterprogram i tillverkningsteknik
Supervisors
Examiners
Available from: 2021-01-05 Created: 2020-12-21 Last updated: 2021-01-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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