美国一项专利（专利号吧5068149）提出一种生产硬质合金线制品或律制品的方法，使用的硬质合金含有4～35％（mass）的Co或Ni粘结相，同时粘结相中杂质含量为＜0．0001～0．005％（mass）。分散固相为0．l～40％（质量），余量为WC。固相晶粒度为0．2～fiLL，杂质晶粒度为＜10Il A U.S. patent (Patent No. 5068149) proposes a method of producing a cemented carbide wire product or a legal product using a cemented carbide containing 4 to 35 mass% of a Co or Ni binder phase while a binder phase In the impurity content of <0.0001 ~ 0.005% (mass). The dispersed solid phase is zero. l ~ 40% (mass), the balance of WC. Solid phase grain size of 0.2 ~ fiLL, impurity grain size of <10Il