目前广泛使用的铸铁刹车盘导热率低、易热裂、耐磨性差，需要加以改进。
Iron brake disc used widely at present with low thermal conductivity, easy hot cracking and low wear resistance needs to be improved.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
Copper nickel, good machinability bad crack resistance. Repair welding of shole gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
Copper nickel good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
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