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Cemented carbide represents a group of hard and wear-resistant sintering composite material which is composed of hard metal compound and metal binder. The compounds used in cemented carbide are WC, TiC, TaC, NbC, Cr3C2, VC and so on, and the binders include Co,Ni. Main characteristics of cemented carbide are as following.

  High hardness and strength

  High modulus of elasticity

  Stable chemical property

  Low impact toughness and thermal expansion coefficient