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作者通过改变高速钢中含钒量和含碳量,得到不同微观组织和机械性能的磨料基体,并对其磨损性展开研究。结果表明:高速钢的耐磨性通常取决于其硬度和微观结构。硬度低于58HRC时,高速钢耐磨性主要受硬度影响;硬度高于58HRC时,其耐磨性主要取决于基体中VC的含量、形态及分布。当钒和碳含量分别在8.15%~10.20%和2.70%~3.15%之间时,可以得到大量的均匀分布球形组织或块状VC化合物,这种基体组织可以有效抵抗三氧化铝磨料的微切割,并且削弱裂纹的扩展和加深。正因为如此,高钒碳含量的高速钢表现出优良的耐磨性。
By changing the vanadium content and carbon content in high-speed steel, the authors obtained the abrasive matrix with different microstructure and mechanical properties, and studied the wear properties. The results show that the wear resistance of HSS usually depends on its hardness and microstructure. When the hardness is lower than 58HRC, the wear resistance of high speed steel is mainly affected by the hardness. When the hardness is higher than 58HRC, its wear resistance mainly depends on the VC content, morphology and distribution in the matrix. When the contents of vanadium and carbon are between 8.15% ~ 10.20% and 2.70% ~ 3.15% respectively, a large amount of uniformly distributed spherical or bulk VC compounds can be obtained, which can effectively resist the micro-cutting of alumina abrasive , And weaken the expansion and deepening of cracks. Because of this, high-carbon steels with high vanadium content exhibit excellent wear resistance.