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研究了用于制动盘的3种不同类型的灰铸铁(强度等级250MPa灰铸铁,高碳灰铸铁,钛合金化灰铸铁)的耐磨性,并将所获得的结果与蠕墨铸铁(CGI)耐磨性进行了比较。磨损试验是在带销子制动盘磨损试验机上完成的。销子由通常用于轻型货车制动块的摩擦材料制造。旋转制动盘(500rpm)承受0.7、2和4MPa的循环压力,并实施强制冷却。磨损量通过称量制动盘和制动块以实验前后的质量来测定。在每次试验过程中,运行温度和摩擦力是受到监控的。试验结果表明:与3种灰铸铁相比,蠕墨铸铁达到更高的最大温度和摩擦力;并且,在任何试验压力下,其质量损失也更大。然而,当蠕墨铸铁采用较低的试验压力和与灰铸铁制动盘相同的摩擦力试验时,蠕墨铸铁呈现出与灰铸铁相同的现象。
The wear resistance of three different types of gray cast iron for brake discs (gray cast iron of strength grade 250 MPa, high-carbon gray cast iron, titanium gray cast iron) was studied and the results obtained were compared with CGI Wear resistance was compared. The wear test is done on a wear tester with a pin brake disc. The pins are made of friction materials commonly used in light truck brake pads. Rotating brake discs (500 rpm) withstand cyclic pressures of 0.7, 2 and 4 MPa and forced cooling. The amount of wear is measured by measuring the mass of the brake disc and brake pads before and after the experiment. During each test run temperature and friction are monitored. Test results show that vermicular graphite cast iron achieves higher maximum temperatures and friction than the three gray cast irons and also has a greater mass loss at any test pressure. However, compacted graphite cast iron exhibits the same behavior as gray cast iron when vermicular graphite cast iron is tested at a lower test pressure and the same frictional force as a gray cast iron brake disc.