1.The main reason for cracking of brake drum is thermal fatigue. The main measure to prevent brake drum cracking is to improve its thermal fatigue resistance.

    2.The way to improve the thermal fatigue resistance of brake drum is to improve thermal conductivity and stability under certain strength.

    3.The increase of the thermal conductivity of the brake drum can be achieved by increasing the number of graphite and the length of graphite; the strength and stability of the enhanced tissue can be achieved by adding certain alloying elements Cu, Ni, Cr, and Mo.

    4.By selecting suitable material composition and improving the thermal fatigue resistance of brake drum, the service life of brake drum can be 3 times that before improvement.