Sığ Kriyojenik İşlemin AISI 410 Paslanmaz Çeliğin Mekanik Özelliklerine Etkisinin Araştırılması

Kriyojenik işlem malzemelere uygulanan ve malzemelerin tribolojik özelliklerini geliştiren ve geleneksel ısılişlemi tamamlayıcı veya geleneksel ısıl işleme alternatif ucuz bir ısıl işlemdir. Malzemelere uygulanankriyojenik işlemin, kalıntı östeniti martenzite dönüştürdüğü, daha homojen mikroyapı sağladığı, aşınmadirencini, sertlik ve elektrik iletkenliğinde artış sağladığı bilinmektedir. Bu çalışmada sığ kriyojenik işlemin AISI410 paslanamaz çeliğin mikroyapısına, sertliğine ve elektrik iletkenliğine etkisi araştırılmıştır. Sığ kriyojenikişlem 4 farklı (24, 48, 72 ve 96 saat) bekleme sürelerinde uygulanarak bekleme süresinin etkisi tespit edilmiştir.İşlem görmemiş numuneler (N0) referans alınarak sonuçlar değerlendirilmiştir. Elde edilen sonuçlara göre sığkriyojenik işlemin AISI 410 paslanmaz çeliğin mikroyapısını düzenleyerek homojen hale getirdiğigözlemlenmiştir. Sığ kriyojenik işlem N4 numunenin sertliğini, N0 numuneye göre yaklaşık %4 arttırmıştır.Ayrıca elektrik iletkenliğinde %300 artış sağlanmıştır. Sertlik ve elektrik iletkenliğine en fazla etki 96 saatbekleme süresinde elde edilmiştir. Genel olarak sığ kriyojenik işlemin, uygun bekleme süresinde, paslanmazçeliğin sertlik ve elektrik iletkenliğine olumlu etkiye sahip olduğu görülmüştür.

Investigation of the Effect of Shallow Cryogenic Treatment on the Mechanical Properties of 410 Stainless Steel

Cryogenic processing is a cheap heat treatment applied to materials and improving the tribological properties of materials and complementing conventional heat treatment. It is known that the cryogenic process applied to the materials transforms the residual austenite martensite, provides a more homogeneous microstructure, provides abrasion resistance, increases the hardness and electrical conductivity. In this study, the effect of shallow cryogenic process on microstructure, hardness and electrical properties of AISI 410 stainless steel was investigated. Shallow cryogenic processing was performed at 4 different waiting times (24, 48, 72 and 96 hours) to determine the effect of waiting time. According to the results, it was observed that the shallow cryogenic process regulated the microstructure of AISI 410 stainless steel and homogenized. The shallow cryogenic process increased the hardness of the sample by about 4%. In addition, the electrical conductivity increased by 300%. The maximum impact on hardness and electrical conductivity was obtained at a waiting time of 96 hours. In general, the shallow cryogenic process has been found to have a positive effect on the hardness and electrical conductivity of the stainless steel in the appropriate waiting time.

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