INVESTIGATION OF WEAR BEHAVIOR OF BORONIZED AISI 316 STAINLESS STEEL

Yıl 2019, , 1105 - 1114, 31.07.2019

Polat Topuz , Tuna Aydoğmuş

https://doi.org/10.28948/ngumuh.598201

Cited By: 1

Öz

   In this study, the wear behavior of
boronized AISI 316 stainless steel was investigated. The chemical analysis of
the sample to be used in the experiment was carried out with optical emission
spectrometry before starting the boronizing experiment. Boronizing experiment
using pack-boronizing method were carried out at 950°C for 3 hours. As the
boron source, a powder mixture having the commercial name Ekabor 2 consisting
of SiC, B₄C and KBF_4, was used. As a result of the
boronizing treatment, the boride layer formed on the surface of AISI 316,
morphologically by Scanning Electron Microscope (SEM-BEI), thickness by optical
microscope integrated visual analyze system, hardness by Vickers indenter and
chemical analysis by XRD (X-ray diffraction) device, were investigated. Then,
friction tests were carried out to determine the wear resistance of the boride
layer. As a result, it is determined that the boron layer formed on the surface
of boronized AISI 316 stainless steel, consists of a double phase iron-boride
layer.  This layer is a columnar
morphology and homogeneous thickness. Also it has been determined to have ultra-hard
and high wear resistance.

Anahtar Kelimeler

AISI 316 stainless steel, pack-boronizing, Ekabor 2, iron-boride layer, wear resistance

BORLANMIŞ AISI 316 PASLANMAZ ÇELİĞİN AŞINMA DAVRANIŞININ İNCELENMESİ

Öz

 

   Bu çalışmada borlanmış AISI 316 paslanmaz
çeliğin aşınma davranışı incelenmiştir. Borlama işlemi öncesi, optik emisyon
spektrometresi yardımıyla, deney numunesinin kimyasal analizi
gerçekleştirilmiştir. Borlama deneyi, 950°C’de 3 saat süre ile kutu borlama
yöntemi kullanılarak gerçekleştirilmiştir.  
Borlayıcı olarak, SiC, B₄C and KBF₄’ den oluşmuş,
ticari adı Ekabor 2 olan toz karışımı kullanılmıştır. Borlama işlemi sonucunda,
AISI 316 paslanmaz çeliğin yüzeyinde oluşan borür tabakasının morfolojisi,
tarama elektron mikroskobu (SEM-geri saçılan elektronlar), kalınlığı optik
mikroskoba entegreli görüntü analiz sistemi, sertliği Vickers batıcı uç ile ve
kimyasal analizi XRD (X-ışını difraksiyonu) cihazı ile gerçekleştirilmiştir.
Daha sonra, borür tabakasının aşınma direncini belirlemek için, sürtünme testi
gerçekleştirilmiştir. Sonuç olarak, borlanmış AISI 316 paslanmaz çeliğin
yüzeyinde oluşan demir-borür tabakasının çift fazlı olduğu belirlenmiştir. Bu
tabaka, kolonsal yapılı ve homojen kalınlıktadır. Ayrıca, çok sert ve yüksek
aşınma direncine sahip olduğu belirlenmiştir.

Anahtar Kelimeler

AISI 316 paslanmaz çelik, kutu borlama, Ekabor 2, demir-borür tabakası, aşınma direnci

Kaynakça

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