하드 아노다이징 공정에 따른 EV 브레이크 디스크의 기계적 특성 평가

Abstract

In the automotive sector, the future of automotive exhaust gas reducing energy sources and alternative energy technologies for electric vehicles, hybrid vehicles, fuel cell vehicles, such as the development of electric energy-based power technologies are gaining attention. If the production of electrical energy in electric cars that arise in the course of pollution effects on the combustion of a car is a fraction of the level. In addition, electrical energy, solar energy, nuclear, and hydroelectric power generation, and the presence of various cheongjeon, as well as environmental pollution caused by driving electric cars because there is very little in terms of environment and energy has a very good technical background. A material of automotive brake disc rotor disk, since the introduction of the 1950's mostly gray cast iron has been used. However, cast iron brake discs improve the thermal conductivity and weight reduction efforts are still underway. Repeat the lack of thermal conductivity of the brake disc and cause cracks to open when you work, and thermal diffusion capacity in order to improve this situation for the purpose of improving the control of material composition, improved methods of casting, and has been used benteuhol structural changes However, this trend is the brake disk is limited to angry and Japan, the United States, Germany, libc application of aluminum alloys and composite materials, some studies are under way.Aluminum has low density, light weight, excellent resistance to corrosion because it has such features as the demand in the industry is growing. However, it is easy to damage the surface hardness is low, since it includes a high friction characteristics is limited in its use. In this paper, in order to overcome these limitations, one of several methods of surface treatment by using a hard anodized aluminum oxide film on the surface increases the surface hardness of the abrasive and was looking to increase resistance to corrosion. In addition verify the authenticity of the brake disc to the surface, friction, wear, experiment and tissue images were observed.In this paper, for the purpose of EV lightweight brake discs that can be applied to the study of EV in a paper for the development of the aluminum brake discs, light weight and corrosion experiments were performed using the method availability. Varying the experimental conditions for anodized aluminum Boosting the value of the mechanical properties, and to verify the results of hardness and wear tests conducted by a real electric vehicle can be applied to the brake disc was seeking whether Obtained the following conclusions.

1. Currently mainly used for brake discs, light weight cast iron about the impact factor of the target against a quality investigation was the result of the factors that are difficult to apply to EV components and the external environment, according to the weight of the corrosion was investigated.

2. Replaced by material improvements to the Al-6061, but in order to improve the mechanical properties on the anodized surface treatment is performed, varying the processing conditions to create four types of specimens were carried out laboratory experiments, the resulting coating on the surface, depending on processing time that the two were thickened.

3. Mechanical properties of anodized specimen hardness tests carried out to confirm the results of the test specimen was measured hardness values ​​Hv296, test conditions, process conditions, with 30 minutes of the AN-4 samples with the highest value of the mechanical properties was obtained. 4. An important factor characteristics of the brake disk parts of the frictional wear test results conducted by the specimen surface is not likely to apply the coefficient of friction is too high, had to give you a free, surface wear and tear over time as the result obtained by the test specimen AN-4 two cast iron and also that the value of the coefficient of friction to find the closest was

In this paper, anodized surface, and then analyzed the mechanical properties of the aluminum brake discs replaced with a lighter when the effects can be obtained, compared to cast iron 1 / 3 the weight was reduced. However, the mechanical properties of aluminum surface treatment did not significantly effect on the brake disc to cast off that there was the danger in this paper could find. EV future through the hard anodizing process applied to a light weight is determined to play a major role, when applied to the current low-speed electric vehicles are expected to be greater the effect.