Funda KAHRAMAN, Mustafa Kemal KÜLEKCİ, UĞUR EŞME

Investigation of white layer formation in liquid nitriding of AISI 1030 and 4140 steels

Sıvı nitrasyon prosesi malzemelerin yüzeyinde azotça zengin bir tabaka oluşturur. Bu tabaka, ana metale yakın diffüzyon tabakası ve onun dışında bir bileşik tabaka (beyaz tabaka) olmak üzere iki tabakadan ibarettir. Bu çalışmada, AISI 1030 ve 4140 kalite çelikten imal edilmiş dişlilerin, sıvı nitrasyonunda oluşan beyaz tabakanın kalınlığı araştırılmıştır. Beyaz tabaka oluşumuna proses parametrelerinin etkisi belirlenmiştir. Deneysel araştırmalar göstermiştir ki, beyaz tabaka kalınlığını, banyonun kompozisyonu, malzemenin türü ve nitrasyon süresi etkilemektedir.

AISI 1030 ve 4140 çeliklerin sıvı nitrasyonunda beyaz tabaka oluşumunun araştırılması

Liquid nitriding process produces a nitrided case on the surface of the materials. This nitrided case consists of two layers; a compound layer (white layer) in the outer and diffusion layer near to base metal. In this study the thickness of white layer formation in liquid nitriding process of gears manufactured from AISI 1030 and 4140 is investigated. The effect of process parameters on white layer formation is assed. The experimental studies showed that, the composition of the bath and material and nitriding time identify the obtainable white layer thickness.

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