Abstract:
A method of producing a component of a composite of diamond and a binder, wherein a Hot Isostatic gas Pressure process (HIP) is used, includes the step of enclosing a de-bound green body having compacted diamond particles in an infiltrant. The method includes the further steps of enclosing the de-bound green body and the infiltrant in a Zr-capsule that has Zirconium as a main constituent and sealing the Zr-capsule, and applying a predetermined pressure-temperature cycle on the unit formed by the de-bound green body, infiltrant and capsule in which the infiltrant infiltrates the de-bound green body and the de-bound green body is further densified in the sense that the volume thereof is decreased.
Abstract:
A cBN material and a method of making a cBN material, the method including the steps of providing a powder mixture comprising cBN grains, aluminum and a Ti(CxNyOz)a powder, subjecting the powder mixture to a milling to form a powder blend, subjecting the powder blend to a forming operation to form a green body, subjecting the green body to a pre-sintering step, at a temperature between 650 to 950° C., to form a pre-sintered body, and subjecting the pre-sintered body to a HPHT operation to form the cBN material. For the Ti(CxNyOz)a powder, 0.05≦̸z≦̸0.4. In addition, a cBN material includes cBN grains, an Al2O3 phase, a binder phase of TiC, TiN and/or TiCN, W and Co, whereby a quotient Q is
Abstract:
A lithography based method for the manufacture of diamond composite materials in which green bodies are prepared by a layer-by-layer construction with resulting green bodies de-bound and sintered to achieve a dense high hardness material.
Abstract:
The present invention relates to a cutting insert for turning in heat resistant super alloys and stainless steels comprising a very fine grained hard substrate and a coating. The substrate comprises WC 5-8 wt-% Co and 0.3-1.5 wt-% Cr. Additionally, ppm levels of Ti, Ta, or mixtures of these, are present. The ratio of Me/Co= (at-%Ti+ at-%Nb+at-%Ta)/at-%Co is lower than or equal to 0.014-(CW_Cr)*0.008 and higher than 0.0005. The average sintered WC-grain size is 0.5-0.95 µm and CW_Cr 0.75-0.95. The cemented carbide body is coated with a PVD Ti x Al 1-x N-coating with an average composition of 0.4 1 µm, but racterised in that the substrate comprises WC, 5-8 wt% Co, 0.3-1.5 wt% Cr, and ppm levels of Ta, Ti or mixtures thereof, present in such amounts that the ratio Me/Co=(at-%Ti+at-%Ta)/at-%Cc is lower than or equal to 0.014-(CW_Cr)*0.008 and higher than 0.0005, and CW_Cr is 0.75-0.95, wherein CW_Cr= (magnetic-% Co +1.13*wt-% Cr)/wt-% Co, wherein magnetic-% Co is the weight percentage of magnetic Co, wt-% Cr is the weight percentage of Cr and wt-% Co is the weight percentage of Co in the cemented carbide, and the coating is a PVD Ti x Al 1-x N-coating with an average composition of 0.4 1 µm, but
Abstract:
A cBN material and a method of making a cBN material, the method including the steps of providing a powder mixture comprising cBN grains, aluminum and a Ti(CxNyOz)a powder, subjecting the powder mixture to a milling to form a powder blend, subjecting the powder blend to a forming operation to form a green body, subjecting the green body to a pre-sintering step, at a temperature between 650 to 950° C., to form a pre-sintered body, and subjecting the pre-sintered body to a HPHT operation to form the cBN material. For the Ti(CxNyOz)a powder, 0.05≦̸z≦̸0.4. In addition, a cBN material includes cBN grains, an Al2O3 phase, a binder phase of TiC, TiN and/or TiCN, W and Co, whereby a quotient Q is
Abstract translation:一种cBN材料和一种制备cBN材料的方法,该方法包括以下步骤:提供包含cBN晶粒,铝和Ti(C x N y O z)粉末的粉末混合物,使粉末混合物经研磨以形成粉末混合物, 该粉末共混成形成生坯的成形操作,在650-950℃的温度下对生坯进行预烧结步骤,以形成预烧结体,并将预烧结体 到HPHT操作以形成cBN材料。 对于Ti(CxNyOz)粉末,0.05&amp; Zn; z&nlE; 0.4。 此外,cBN材料包括cBN晶粒,Al 2 O 3相,TiC,TiN和/或TiCN,W和Co的粘结相,其中商Q为cBN材料的<0.25。