Briefly Talk About Several Different Brake Pads Made Of Different Materials.
Information Summary:
From the formula technology is divided into: asbestos, semi-metal, non-asbestos organic brake material (NAO), the following briefly talk about several different materials of brake pad.Asbestos brake pads The original brake pads were asbestos...
From the formula technology is divided into: asbestos, semi-metal, non-asbestos organic brake material (NAO), the following briefly talk about several different materials of brake pad.
Asbestos brake pad
The original brake pads were made of asbestos because of their high strength and high temperature resistance, so they met the requirements of the brake pads and clutch discs and pads.But asbestos is consumed "powder is very subtle floating in the air will harm the body health, asbestos heat conduction ability especially bad, often repeated use can make brake pads overheating, its braking performance will be greatly reduced, to have the same power requires more number of brakes, this phenomenon is known as the" brake atrophy, "if the brake pads heat is too high, will cause brake failure.When vehicle manufacturers and brake material suppliers decided to develop new and safer asbestos alternatives, new friction materials were created almost at the same time.These are the "semi-metallic" type and asbestos-free type (NAO) brake pads to be discussed below.
"Semi-metal" type brake pad
Semi-met brake pads are mainly made of rough steel velvet.Asbestos - and asbestos-free brake pads (NAO) are easily distinguishable by their appearance (fine fibers and particles), and their magnetic properties allow abrasive powder to adhere to the inner wall of the hub to reduce air hazards.Steel velvet has high strength and thermal conductivity, which makes the "semi-metal" composite brake pads have different braking characteristics from the traditional asbestos brake pads.
For example, "semi-metal" brake pads contain high metal content and high strength, which also changes the friction characteristics of the brake pads. It usually means that "semi-metal" brake pads need higher braking pressure to achieve the same braking effect.Especially in low temperature environment, high metal content also means that the brake pad will cause a large brake disc or brake drum surface wear, and will produce noise.
"Half" metal mixture type brake pads (Semi - met), the main advantage is that its temperature control ability and the higher temperature of the brake, with the heat transfer performance of asbestos and the difference between the cooling capacity difference between the brake disc, brake drum and compared their help when the brakes brake disc and brake drum will heat from its distributed on the surface, the heat is passed to the brake caliper and its components.Of course, if this heat is mishandled, it can cause the brake fluid to heat up and rise in temperature. If the temperature reaches a certain level, it can cause the brake fluid to shrink and boil.This heat also has a certain effect on the brake pliers, piston seal ring and return spring, which will accelerate the aging of these components. This is also the reason for the re-assembly of the brake pliers and the replacement of metal parts during brake maintenance.
