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虽然土耳其制造的闸瓦的预期寿命为80h,但是大约有一半的闸瓦在40h后就不能使用了。这种材料损失表示每年要损失12500t铸铁。列车在时速80～120km时的制动是一个重要问题。例如,对以每小时120km的速度运行的列车来说,制动时在闸瓦与车轮界面处的单位接触面积内所产生的摩擦热约为4.4×10~6Wm。在本研究中,对由含有3.0～3.69%C、1.56～1.91%Si、0.60～1.33%Mn、0.65～0.80%P、0.04～0.13%S及用铜或锡合金化的灰铸铁闸瓦材料进行了检测。其匹配材料即用于制造列车车轮的材料,是一种含有0.07%C、0.5%Si、1.2%Mn、0.05%S、
Although the life expectancy of Turkish-made brake shoes is 80h, about half of the brake shoes can not be used after 40h. This material loss means that 12,500 tons of cast iron will be lost each year. Braking at 80 to 120km per hour is an important issue. For example, for a train running at a speed of 120 km / h, the frictional heat generated in the unit contact area between the brake shoe and the wheel interface during braking is about 4.4 × 10 -6 Wm. In this study, a gray cast iron brake shoe made from an alloy containing 3.0 to 3.69% C, 1.56 to 1.91% Si, 0.60 to 1.33% Mn, 0.65 to 0.80% P, 0.04 to 0.13% S and alloying with copper or tin Tested. Its matching material, that is, the material used for the manufacture of train wheels, is a material containing 0.07% C, 0.5% Si, 1.2% Mn, 0.05% S,