Investigation on Machining Responses during Hard Turning of AISI D2 Steel under Dry, Wet and Nano-based MQL Conditions

Chandra, Vaibhav; Ghosh, Sudarsan; Rao, P.V.

doi:10.1007/978-981-32-9417-2_41

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“…Vladimirov ve diğerleri, regresyon analizi temelinde, yüzey pürüzlülüğü üzerindeki titreşimli tornalama titreşim parametrelerinin etkisini belirleyen matematiksel bir model geliştirmişlerdir[13]. Chandra ve diğerleri, AISI D2 çeliğini, kuru, soğutma sıvısı ve alümina bazlı nanoparçacıklı MQL ortamında tornalamış ve MQL kesme ortamının, kuru ve ıslak kesme ortamlarından daha iyi sonuçlar verdiğini ifade etmişlerdir[14]. Panda ve diğerleri, AISI 4340 çeliğin (49HRC) kaplamalı seramik takımla kuru sert tornalanmasında yüzey pürüzlülüğünü modellemişlerdir.…”

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DIN 1.2367 Çeliğin CBN Takımlarla Sert Tornalanmasında Kesme Parametrelerine Bağlı Olarak Yüzey Pürüzlülüğünün Değerlendirilmesi

Şahinoğlu

Yavuz

Akkaş

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, the effect of cutting parameters on the surface roughness of hard turning DIN 1.2367 (55 HRC) steel material was investigated. Three different cutting speeds, feed rates and cut of depths were used in experiments conducted under dry cutting conditions. It was seen that the most effective cutting parameter in the surface roughness value was the feed rate. In addition, a mathematical model was created to estimate the surface roughness. Figure A. Surface roughness main effect plotsPurpose: In this study; The effect of cutting parameters on the surface roughness was examined and DIN 1.2367 steel was used as the work piece material. Tool steel 1.2367 is a hot work steel with high wear resistance and heat resistance. This material is often used in large pressure die casting production.Theory and Methods: In this study, to examine the hard turning process, DIN 1.2367 material was cooled suddenly in oil after being heated at 900 ℃ for 2 hours to reach a hardness value of 55 HRC by heat treatment. After this process, the steel material has reached a very high hardness value. But the fragility of the material has increased. Tempering has been used to reduce the brittleness of the material. In order to remove the stresses in the cooled material, it was heated at 300 ℃ for 1 hour and cooled in air.Results: Nine additional tests were conducted to observe the effects of the coolant only. Thus, processing time and cost were limited. There appears to be no noticeable change in surface roughness due to the use of coolant. The reason for this can be shown as the temperature does not increase with the CBN tips used in the experiments. The cutting parameter that most affects the surface roughness is the feed rate. It has been determined that as the amount of advance increases, the surface roughness increases. It is known that the feed rate has a significant effect in reducing the surface roughness. Conclusion:In this study, characterization study has been done for DIN 1.2367 steel material and detailed information about the mechanical properties of the material was obtained. According to the results obtained in the experimental studies; It has been observed that surface quality can be obtained by using cutting tools with suitable machine tool and optimum cutting parameters suitable for hard turning process.

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