(西安建筑科技大學 機電工程學院，西安 710055)
摘 要: 通過對鎢絲和灰口鑄鐵熔體組成的體系施加一定的電磁場，促使鎢絲與熔體中的碳原子進行反應, 原位生成WC顆粒。利用SEM、EDS和XRD對復合材料的顯微組織進行研究。結果表明：在電磁場頻率為4 kHz,電流為15 A時, 原位合成的WC顆粒均勻地分散在鎢絲周圍，WC顆粒與未反應的鎢絲共同組成混雜增強鐵基復合材料。兩體磨損試驗結果表明：與對比試樣相比，混雜增強鐵基復合材料的耐磨性提高約2.5倍，這可歸因于原位合成的WC顆粒硬度較高且彌散分布在基體中。
關鍵字: WC顆粒；原位合成；混雜增強
in-situ WC particles and tungsten wires
（College of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China）
Abstract:The in-situ synthesis of WC particles through reaction between tungsten wires and carbon atoms was observed by exerting an electromagnetic field to the system consisting of tungsten wires and melt of gray cast iron. The microstructures of the composites were studied by means of SEM, EDS and XRD. The results show that when the frequency of the electromagnetic field is 4 kHz and the current is 15 A, the WC particles are in-situ synthesized and distribute around the residual tungsten wires. Iron matrix composites reinforced hybridly by in-situ WC particles and the residual tungsten wires are obtained. The results of two-body abrasive test shows that the wear resistance of the hybrid reinforced iron matrix composite is 2.5 times higher than that of the reference sample, this is attributed to the higher hardness of in-situ WC particles and their dispersive distribution in the matrix.
Key words: tungsten carbide; in-situ synthesis; hybrid reinforced
