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The in‐situ V8C7‐V3B4/Fe45 composites were fabricated by vacuum sintering using ferrovanadium, carbon black and Fe45 alloy powders as raw materials. The microstructure, phase structure and hardness of sintered Fe45+x wt.% (FeV+C) composite specimens (x = 0, x = 5, x = 10, x = 15, x = 20) were investigated. The results show that the type and shape of in‐situ borides and carbides depend on the content...