Abstract
In this study; brake discs used in vehicles have investigated. The behavior of these discs during braking, wear and braking distance performance of the coated and uncoated surfaces during the braking process were evaluated. The surface of the commercially produced discs was coated with a thickness of 1 mm using the HVOF (High Velocity Oxy-Fuel) coating method. In the coating process CoNiCrAlY, WC-Co (88/12), NiCrBSi and MoNiCrBSiFe (Mo 25%) 4 (four) different ceramic powders were used respectively. Wear and brake distance tests of coated and uncoated discs were performed by braking in a total of 20 brakes in 15 seconds on the brake-suspension tester. After the brake tests, the surface roughness changes of the discs, surface hardness change, mass loss and the abrasion values on the disc surfaces were determined due to the brake force applied to the discs during the experiment. The most wear on the discs was on the CoNiCrAlY ceramic powder coated disc at 0,4 g, while the least wear occurred on the disc coated with NiCrBSi ceramic powder at 0,2 g.
Highlights
Friction based brake systems convert the kinetic energy of the vehicle into thermal energy by friction
The closest roughness values to the uncoated disc were found on the Disc 4
Surface roughness values on Disc 1, Disc 3 and Disc 4 are close to each other. This may be due to the same coating method
Summary
Friction based brake systems convert the kinetic energy of the vehicle into thermal energy by friction. The. Since the late 19th century and early 20th century, amount of heat produced varies with the mass and speed motor vehicles have quickly become indispensable ele- of the vehicle. As a result of the rapid braking reaches high values, glare, glass or thermal technological advances that took place in the second half cracks will form on the disc surfaces. Of the 20th century and the 21st century, the speed ca- the amount of oval and tapered abrasion over time is pacity and the ride comfort of the vehicles developed increasing. High temperatures harden the carbon on the considerably. This situation has led to the development surface of the material and cause the surfaces to be glass
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