Progress of Study on Powder Metallurgical Aluminum-based Composite Brake Disc for Urban Rail Transit
Along with the development of the urban rail transit,the demand for lightweight becomes increasingly urgent.As a lightweight application of the key component of brake system,the aluminum-based brake discs have been widely used in China.The aluminum-based brake discs made by powder metallurgical process have not only many advantages in terms of performance,cost and batch production,but also actual effect of utilization and obvious economic benefit.On this basis,the article introduces in details the influence of the raw material,the manufacture process and the machining technology on the performance and the microscopic structure of the material of the aluminum-based brake discs made by powder metallurgical method,overviews the main progress of the actual application on car of such brake discs in China in recent years,summarizes and analyzes the properties such as friction and wear,resistance to corrosion,resistance to high temperature and economical efficiency of the aluminum-based brake discs and their effect of application on car,and finally predict the application prospect of the powder metallurgical aluminum-based brake discs in urban rail vehicles at higher speed level.The energy-saving and emission reduction benefits achieved through lightweight design are of great significance for the sustainable development of the urban rail transit,promoting the technological progress and the green development of the modern urban transportation systems.
powder metallurgyaluminum-based brake discurban rail transitlightweightcomposite material
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