Kinetic Investigation of Bronized 34CrAlNi7 Nitriding Steel

Yıl 2019, Cilt: 2 Sayı: 1, 0 - 0, 30.04.2019

Polat Topuz , Tuna Aydoğmuş Özlem Aydın

Öz

In this study, kinetic examinations of boronized 34CrAlNi7 Nitriding Steel samples were described. Samples were boronized in indirect heated fluidized bed furnace consists of Ekabor 1™ boronizing agent at 1123, 1223 and 1323 K for 1, 2 and 4 hours. Morphologically and kinetic examinations of borides formed on the surface of steel samples were studied by optical microscope, scanning electron microscope (SEM) and X-Ray diffraction (XRD). Boride layer thicknesses formed on the steel 34CrAlNi7 ranges from 46,6 ± 3,8 to 351,8 ± 15,2 μm. The hardness of the boride layer formed on the steel 34CrAlNi7 varied between 1001 and 2896 kg/mm2. Layer growth kinetics were analyzed by measuring the extent of penetration of FeB and Fe2B sublayers as a function of boronizing time and temperature. The kinetics of the reaction has been determined with K=Ko exp (-Q/RT) equation. Activation energy (Q) of boronized steel 34CrAlNi7 was determined as 169 kj/mol.

Anahtar Kelimeler

Boronizing, 34CrAlNi7, Indirect Heated Fluidized Bed Furnace, Kinetics of Boron

Kaynakça

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