Sıcak daldırma alüminyumlama ve difüzyon tavlaması işleminin çift fazlı (DP800) çeliklerin mikroyapısal ve tribolojik özelliklerine etkilerinin incelenmesi

Yıl 2024, Cilt: 30 Sayı: 6, 737 - 741, 29.11.2024

Yakup Yürektürk , Cansu Çeltik

Öz

Bu çalışmada, sıcak daldırmalı alüminyumlama (HDA) (725°C'de
90 sn.) ve difüzyon tavlaması işleminin DP800 çeliğinin mikroyapısal ve
tribolojik özellikleri üzerindeki etkileri incelenmiştir. HDA işleminden
sonra numunelerden biri havada (HDA-1), diğeri ise 300°C'ye
ayarlanmış fırında (HDA-2) 1 saat difüzyon tavlaması işlemine tabi
tutularak havada soğumaya bırakılmıştır. Kaplama mikroyapısındaki
dönüşüme bağlı olarak değişen mekanik ve tribolojik özellikler sırasıyla
sertlik ve aşınma davranışı bakımından incelenmiştir. Mekanik
karakterizasyon sonuçları, difüzyon tavlaması işleminin sıcak daldırma
alüminize çeliğin sertlik değerini 1100 HV değerlerine çıkardığını
göstermektedir. Aşınan bilye hacmi ve sürtünme katsayıları dikkate
alındığında en gelişmiş tribolojik özellikler difüzyon tavlaması işlemi
görmüş HDA prosesinde (HDA-2) gözlenmiştir.

Anahtar Kelimeler

DP800 çelik, Sıcak daldırma alüminyumlama, Difüzyon tavlaması, Aşınma

Investigation of the effects of hot dip aluminizing and diffusion annealing on microstructural and tribological properties of dual phase (DP800) steels

Öz

In this study, the effects of hot dip aluminizing (HDA) (90 s at 725°C)
and diffusion annealing on the microstructural and tribological
properties of DP800 steel were investigated. After HDA treatment, one
of the sample was left to cool in air (HDA-1) and the other one left to
cool in air after being subjected to a diffusion annealing for 1 hour in an
oven set at 300°C (HDA-2). Evolution in mechanical and tribological
properties depending on the developments in the coating
microstructure investigated in terms of hardness and wear behaviour,
respectively. Mechanical characterization results show that diffusion
annealing increases the hardness value of hot dip aluminized steel to
1100 HV values. Considering the wear ball volume and friction
coefficients, the most advanced tribological properties were observed in
the diffusion-annealed HDA process (HDA-2).

Anahtar Kelimeler

DP800 steel, Hot dip aluminizing, Diffusion annealing, Wear

Kaynakça

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