Abstract
When the surface of gray cast iron is subjected to laser irradiation and melted and then re-solidified, a material can be obtained that has a superior structure and properties to the base metal. On the surface of gray iron brake drums, the surface of the raw material can be processed into a bionic coupling surface with different shapes, structures, and soft and hard tissues similar to the surface of an organism. The wear resistance and fatigue resistance of brake drum surfaces can be greatly improved. However, the relative wear characteristics of the friction pairs in brake systems show that performance improvements in brake systems are the result of appropriately matching the brake drum and brake pad. This paper studies the wear relationship between three kinds of commonly-used brake pads (semi-metallic, organic asbestos-free, and ceramic) and different biomimetic models of brake drum samples. The interaction mechanism and failure mode between three kinds of brake pads and bionic samples were determined. According to the wear test results, the matching relationship between the brake pads and the brake drum was analyzed and determined, which provides a basis for the application of bionic brake drums.
Highlights
Due to their low cost, good thermal conductivity, and processability, gray iron brakes are widely used in truck braking systems [1]
Solutions from the perspective of material properties have included the use of steel brake drums [2], aluminum composite brake drums [3], and nodular cast iron or vermicular cast-iron brake drums [4,5,6]
The results have shown that machined surfaces couldformed be changed to somea laser-melted extent by machining point, stripe, grid bionic coupling surfaces by combining area withthe a base metal area and in brake biomimetic units on the surface of cast-iron brake drums
Summary
Due to their low cost, good thermal conductivity, and processability, gray iron brakes are widely used in truck braking systems [1]. The results have shown that consuming the leaststrengthening amount of energy to obtain thetruck greatest benefits, in the formation of bionic coupling surfaces formed by combining a laser-melted area with a base metal area in brake many excellent structural characteristics [8,9]. Bionic reinforcement surfacesofproduced by coupling bionics have good wear resistance and unit and determined the influence model parameters on the surface performance fatigue resistance on the inner wall of the brake drums. Bionic reinforcement surfaces produced by coupling bionics have good wear resistance fatigue of a brake disc and a brake pad, the inclusion of a unilateral brake does not enhance the service resistance on the inner wall of the brake drums. Brake hub was redesigned to improve the performance of the whole bionic brake system
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