Abstract
Wear resistance and Frictional stability are key performance requirements for brake lining. Automotive brake linings are usually made of various ingredients such as binder, filler, friction modifiers and reinforcement. Rockwool is a mineral fiber and steel fiber is a metallic fiber. In this work reinforcement fibers used are both the mineral and metallic fibers with six different composition prepared and tested. The result shows that metallic fibers should be high compared to mineral fiber for best frictional performance and wear resistance. Friction-wear properties of the reinforced samples were investigated on the cast iron disc as a counterpart using a pin on disc wear tester. The investigation confirmed that the sample with increase in steel fiber (4%, 8% and 12%) improves the wear resistance. On the other hand specimen with high content of Rockwool fiber forms an improper ratio among the other ingredients. The SEM images of the sample indicated that an increase in steel fiber higher than 12% content resulted in adhesive wear.Analysis of the experimental result shows that the sample with 12% steel fiber and 8% Rockwool fiber exhibited the optimum friction-wear behavior. Finally the effect of environment on the composites was investigated in water, salt water and oil.
Highlights
INTRODUCTIONThe essential component in a braking system are brake drum (rotating part) and brake lining which is the stationary part to press against the brake drum to slow or stop the rotation [1]
The scanning electron microscope (SEM) images of the sample indicated that an increase in steel fiber higher than 12% content resulted in adhesive wear.Analysis of the experimental result shows that the sample with 12% steel fiber and 8% Rockwool fiber exhibited the optimum friction-wear behavior
The essential component in a braking system are brake drum and brake lining which is the stationary part to press against the brake drum to slow or stop the rotation [1]
Summary
The essential component in a braking system are brake drum (rotating part) and brake lining which is the stationary part to press against the brake drum to slow or stop the rotation [1]. Graphite is extremely resistant to heat and highly chemically inert in contact with almost any other material It is used in brake lining with the need to substitute for asbestos. Designing friction brake material is often based on experience or a trial and error method to make a new formulation It has long been claimed as a problem of multistage optimization right from selection of ingredients to processing till reaching at appropriate set of performance criteria [13-17]. A limited number of studies investigating the effect of reinforcement fibers in brake pad materials are available in the literature and complete analysis of the keyrole of reinforcement fiber is seldom found In this experiment steel and rockwool fiber increased up to 20% by increasing 4, 8 ,12, 16 and 20%
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