The Effect of Cutting Parameters on White Layer Thickness and Surface Hardness in Wire EDM of Heat-treated D2 Cold Work Tool Steel

Year 2021, Volume: 5 Issue: 2, 181 - 186, 31.12.2021

Hasan Ballıkaya , Mehmet Altuğ

https://doi.org/10.46460/ijiea.994690

Abstract

In this study, the effects of cutting parameters of Sverker 21 cold work tool steel on the white layer and cutting surface hardness of the post-processing material were investigated using wire erosion (WEDM) method. The purpose of using high alloy steel; It is widely used in the molding industry due to its high hardness, wear resistance and toughness properties depending on the alloying element and carbon ratio it contains. Both commercial and heat treated cold work tool steel were used in the experimental studies. Commercial sample and heat treated sample, time between two arcs (µs), voltage (V), liquid pressure (bar), wire tension (g), wire feed rate (m/min) were used as cutting parameters. Materials were cut using the Taguchi experimental design plan and the L18 orthogonal array for the experiment design. As a result, the machined surface hardness and the regenerated white layer thickness were investigated. According to the ANOVA method, the most effective parameter on the white layer thickness is the commercial and heat treated sample parameter with 57,236%. In the cut surface hardness values, the most effective parameter was the sample parameter at the rate of 98.627%.

Keywords

Wire-EDM, White layer, Taguchi, ANOVA

Isıl işlem görmüş D2 Soğuk İş Takım Çeliğinin Tel Erozyonda İşlenmesinde Kesme Parametrelerinin Beyaz Tabaka kalınlığı ve Yüzey Sertliğine Etkisi

Abstract

Bu çalışmada tel erozyon (WEDM) yöntemi kullanılarak Sverker 21 soğuk iş takım çeliğinin kesme parametrelerinin işleme sonrası malzemede oluşan beyaz tabaka ve kesme yüzeyi sertliğine etkileri incelenmiştir. Yüksek alaşımlı çeliğin kullanılmasındaki amaç; içerdiği alaşım elementi ve karbon oranına bağlı olarak yüksek sertlik, aşınma dayanımı ve tokluk özelliklerinden dolayı kalıpçılık endüstrisinde yaygın olarak kullanılmasıdır. Deneysel çalışmalarda hem ticari hem de ısıl işleme tabi tutulmuş soğuk iş takım çeliği kullanılmıştır. Kesme parametreleri olarak ticari numune ve ısıl işlem görmüş numune, iki ark arası süre (µs), voltaj (V), sıvı basıncı (bar), tel gerginliği (g), tel ilerleme hızı (m/min) kullanılmıştır. Deney tasarımı için Taguchi deney tasarım planı ve L18 ortogonal dizini kullanılarak malzemeler kesilmiştir. Sonuç olarak işlenmiş yüzey sertliği ve yeniden oluşan beyaz tabaka kalınlığı incelenmiştir. ANOVA yöntemine göre beyaz tabaka kalınlığı üzerindeki en etkili parametre % 57.236 ile ticari ve ısıl işlem görmüş numune parametresidir. Kesilen yüzey sertlik değerlerinde ise en etkin parametre % 98.627 oranında numune parametresi olmuştur.

Keywords

Tel erozyon, beyaz tabaka, Taguchi, ANOVA

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