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本文通过磨损分析后指出,要充分发挥颗粒型复合合金中硬质颗粒优异的抗磨能力,必须获得强硬质的粘结物组织来牢固地支持其硬质颗粒。在此基础上,通过表面合金化工艺,在灰铁表面上非常稳定地制得了一系列不同尺寸的铸造碳化钨颗粒,并均匀分布于铬钨合金白口铸铁中。磨粒磨损试验表明:粘结物组织对复合合金二体尤其是三体高应力磨损有决定性的作用;以马氏体合金白口铁为粘结物的复合合金在二体及三体高应力磨损条件下均具有极高的耐磨性,铸造碳化钨颗粒尺寸愈大,复合合金耐磨性愈高,当颗粒尺寸由140/200目增大到18/28目时,复合合金在二体及三体磨损条件下的耐磨性分别是马氏体白口铁15Cr2Mo1Cu 的9～31倍和2.8～6.7倍。
In this paper, after abrasion analysis, it is pointed out that in order to give full play to the excellent wear resistance of the hard particles in the grain-type composite alloy, it is necessary to obtain a strong hard bond structure to firmly support the hard particles. On this basis, a series of cast tungsten carbide particles with different sizes were prepared on the surface of gray iron by the surface alloying process, and were uniformly distributed in the white cast iron of chrome tungsten alloy. Abrasive wear tests show that the bonded structure plays a decisive role in the high stress wear of the composite alloy, especially the three-body. The wear resistance of the composite alloy with martensitic alloy white iron as the bonding material is high in two-body and three- Under the high wear resistance, the larger the size of the cast tungsten carbide particles, the higher the wear resistance of the composite alloy, when the particle size increased from 140/200 to 18/28 mesh, the composite alloy in two body and three The wear resistance under body wear condition is 9-31 times and 2.8-6.7 times that of martensite white iron 15Cr2Mo1Cu, respectively.