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    • 38. 发明授权
    • Compound sintered compact for use in a tool and the method for producing
the same
    • 用于工具的复合烧结体及其制造方法
    • US4403015A
    • 1983-09-06
    • US227787
    • 1981-01-21
    • Tetsuo NakaiShuji YazuAkio Hara
    • Tetsuo NakaiShuji YazuAkio Hara
    • B01J3/06B22F7/06B24D3/00B24D3/06B24D3/10B32B18/00C04B35/5831B22F3/14B22F7/08
    • C04B35/5831B01J3/062B22F7/06B24D3/007B24D3/06B24D3/10C04B35/58014C04B35/645B01J2203/062B01J2203/0645B01J2203/0655B01J2203/066B01J2203/0685C04B2235/3843C04B2235/386C04B2235/3886C04B2235/5436Y10T428/12146
    • The invention enables to obtain a compound sintered compact for use in a cutting tool having particularly high properties in respect of bonded strength, hardness, wear resistance, plastic deformability and rigidity by bonding a diamond or cubic boron nitride containing hard layer to a cemented carbide substrate with interposition of an intermediate bonding layer.A powder for forming the intermediate bonding layer comprising cubic boron nitride in an amount less than 70 volume %, the residual part principally consisting of a compound selected from among carbides, nitrides, carbonitrides or borides of 4a, 5a, 6a transition metals of the periodic table, an admixture thereof, or a mutual solid solution compound thereof, after pressing or in the state of powder, is placed on the cemented carbide substrate to a thickness less than 2 mm, or preliminarily applied to said cemented carbide substrate, further on said powder being placed a powder for forming the hard sintered compact containing diamond or cubic boron nitride in an amount in excess of 20 volume % after pressing or in the state of powder, the whole being hot pressed under an ultrahigh pressure and a high temperature to sinter the diamond or cubic boron nitride containing hard layer and the intermediate layer as well as to bond said hard layer, intermediate layer and substrate to each other, thereby enabling to obtain a compound sintered compact having the aforesaid superior properties for use in a cutting tool.
    • 本发明能够获得用于具有特别高的接合强度,硬度,耐磨性,塑性变形性和刚性特性的切削工具中的复合烧结体,该金刚石或立方氮化硼含有硬质层与硬质合金基体 插入中间粘合层。 用于形成中间粘合层的粉末包含小于70体积%的立方氮化硼,残余部分主要由选自周期性的4a,5a,6a过渡金属的碳化物,氮化物,碳氮化物或硼化物组成的化合物 表,其混合物或其相互固溶的化合物在压制或粉末状态之后,以小于2mm的厚度放置在硬质合金基体上,或者预先施加到所述硬质合金基底上,进一步在所述 在粉末中放置粉末,用于形成含有金刚石或立方氮化硼的硬质烧结体,其量超过压制后的20体积%或粉末状态,整体在超高压和高温下热压烧结 含有金刚石或立方氮化硼的硬质层和中间层,以及将所述硬质层,中间层和基板彼此接合, 从而能够获得具有上述用于切削工具的优异性能的复合烧结体。