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fine-grained cemented carbides for turning in varmhu00e5llfasta superalloys (hrsa) and stainless steel
fine-grained cemented carbides for turning in varmhu00e5llfasta superalloys (hrsa) and stainless steel
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机译:细粒硬质合金,用于车削超高温合金(hrsa)和不锈钢
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摘要
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 0.4x0.9 present as single or multilayer coating with a total thickness of 1 µm, but 6.0 µm. 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 0.4x0.9 present as single or multilayer coating with a total thickness of 1 µm, but 6.0 µm.
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机译:用于车削耐热超合金和不锈钢的切削刀片技术领域本发明涉及一种用于切削耐热超合金和不锈钢的切削刀片,该切削刀片包括晶粒非常细的硬质基底和涂层。所述基材包含WC 5-8重量%的Co和0.3-1.5重量%的Cr。另外,存在ppm水平的Ti,Ta或它们的混合物。 Me / Co =(at-%Ti + at-%Nb + at-%Ta)/ at-Co的比率小于或等于0.014(CW_Cr)* 0.008且大于0.0005。烧结后的WC晶粒平均尺寸为0.5-0.95 µm,CW_Cr为0.75-0.95。硬质合金体涂有一层平均成分为0.4 1 µm,但<6.0 µm。其特征在于底物包含WC,5-8重量%的Co,0.3-1.5重量%的Cr和ppm水平的Ta,Ti或其混合物,其含量为Me / Co =(at-%Ti + at-%Ta)/ at-%Cc小于或等于0.014-(CW_Cr)* 0.008且大于0.0005,并且CW_Cr为0.75-0.95,其中CW_Cr =(磁性%Co + 1.13 * wt%Cr)/ wt%Co,其中,磁性%Co是磁性Co的重量百分比,wt%Cr是Cr的重量百分比,wt%Co是硬质合金中Co的重量百分比,和该涂层是PVD Ti x Al 1-x N涂层,平均成分为0.4 展开▼