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一组合金白口铁的抗磨性已在高应力磨损试验中得到确定,这个试验是用一个试样与粘合的磨料滑动接触,施用的磨料是碳化硅、氧化铝和两种粒度的柘榴石。试验结果表明,试验中所用磨料的硬度或类型对白口铁的磨损率有很大影响,即磨损率随着磨料的硬度的增加而增加。试验结果也表明:试验中所用的磨料的类型是评定白口铁对抗高应力磨损的一个重要因素。当用碳化硅或氧化铝磨料作试验时,铸态奥氏体铁的磨损率比热处理过的马氏体铁低;当试验用柘榴石——一种低硬度的磨料时,这些具有马氏体基体显微组织的白口铁的磨损与具有奥氏体基体显微组织的白口铁比起来呈现相同或稍低些的磨损。试验还表明:经热处理的具有马氏体基体显微组织的白口铁的耐磨性表现了程度上的差异,这与冷却速度和合金成分有关。
The abrasion resistance of a group of alloy white iron has been determined in a high stress wear test in which a specimen is in sliding contact with a bonded abrasive with silicon carbide, aluminum oxide and two types of grenadine stone. The test results show that the hardness or type of abrasive used in the test greatly affects the wear rate of the white iron, that is, the wear rate increases as the hardness of the abrasive increases. The test results also show that the type of abrasive used in the test is an important factor for evaluating the resistance of white iron to high stress. When tested with silicon carbide or alumina abrasives, the as-cast austenitic iron has a lower wear rate than the heat-treated martensite iron; when tested with garnet, a low-hardness abrasive, Body base microstructure of white iron wear with austenitic matrix microstructure of white iron than the same or show less wear and tear. The tests also showed that the wear resistance of the heat treated whitened iron with martensitic matrix microstructure shows a degree of difference depending on the cooling rate and the composition of the alloy.