Aşındırıcı Türü ve Boyutunun Otomotiv Fren Balatalarının Sürtünme-Aşınma Performansına Etkisi

Year 2018, Volume: 8 Issue: 2, 335 - 347, 31.07.2018

Bülent Öztürk

https://doi.org/10.17714/gumusfenbil.338925

Cited By: 2

Abstract

Bu çalışmada, aşındırıcı türü ve tane boyutunun otomotiv fren balatalarının
sürtünme-aşınma özelliklerine etkisi incelenmiştir. Numune üretiminde farklı tür ve boyut aralıklarına sahip Al₂O₃,SiC ve B₄C seramik tozlar kullanılmıştır. Numunelerin sürtünme ve aşınma davranışları,
Chase tipi deney cihazında SAE J661 test prosedürüne uygun
olarak tespit edilmiştir. Elde edilen sonuçlardan, en yüksek sürtünme katsayısının Al₂O₃ içeren A63 kodlu
numunede 0,61, en düşük sürtünme katsayısının ise SiC içeren S63 kodlu numunede
0,489 olduğu görülmüştür. B₄C içeren B90 kodlu numune en fazla
aşınma direnci sergilemiştir. Artan aşındırıcı tane boyutuyla numunelerin sürtünme
katsayıları artarken özgül aşınma miktarları azalmıştır. Numunelerin
aşınma davranışlarının ve mekanizmalarının ortaya konulması amacıyla da numune aşınma
yüzeyleri ve aşınma parçacıkları taramalı elektron mikroskopuyla incelenmiştir.

Keywords

Aşındırıcı türü ve boyutu, Fren balatası, Sürtünme-aşınma

Effect of Abrasive Type and Size on the Friction-Wear Performance of Automotive Brake Friction Materials

Abstract

This study investigated the effects
of abrasive type and particle size on the friction-wear characteristics of
automotive brake friction materials. The Al₂O_3, SiC and B₄C
ceramic powders with different type and particle size were used as abrasive. Friction tests were performed on a Chase
friction material testing machine according to the brake lining quality test
procedure as per SAE J661. The composites were contained typical ingredients
for commercial brake friction materials. The results showed that the highest and the lowest friction coefficients were
recorded as 0,61 and 0,489 for Al₂O₃ containing A63 and
SiC containing S63 coded samples. The B90 coded composite containing B₄C
showed the highest wear resistance. The friction coefficient of the composites
increased and the specific wear rate decreased with increasing abrasive
particle sizes. In order to reveal the wear behaviour and mechanism, the worn
surfaces of the composites as well as wear debris were examined under scanning
electron microscopy.

Keywords

Abrasive type and size, Friction materials, Friction-wear

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