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Interface bond mechanisms of ceramic-cemented carbide compact insert

机译：陶瓷硬质合金紧凑型刀片的界面结合机理

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SINCE the 1970s coated cemented carbide tools have been developed so as to further improve their wear and heat resistance. For the coated tools, cemented carbide with high strength and fracture toughness are selected as matrix materials, carbide, boride and nitride with high hardness are used as coating materials. Because the coating thickness of the coated tools is generally not more than 20 jum, the advantages of the coating will disappear gradually owing to the tool wear and regrinding. In this note, ceramic-cemented carbide compact inserts have been developed using hot pressing sintering techniques, the upper part of the compact insert is of Al_2O_3 + TiB_2 ceramic material, while the base part of the compact insert is of WC + Co cemented carbide. The thickness of the upper part of the compact insert is greater than that of the coating of the coated tools. Therefore the compact insert makes full use of the advantages of ceramic materials and cemented carbides so as to improve its mechanical properties and cutting performance.
机译：从1970年代开始开发涂层硬质合金刀具，以进一步提高其耐磨性和耐热性。对于涂层工具，选择具有高强度和断裂韧性的硬质合金作为基体材料，使用具有高硬度的硬质合金，硼化物和氮化物作为涂层材料。因为被涂覆的工具的涂层厚度通常不超过20μm，所以涂层的优点将由于工具的磨损和再研磨而逐渐消失。在此注释中，已使用热压烧结技术开发了陶瓷硬质合金紧凑型刀片，紧凑型刀片的上部为Al_2O_3 + TiB_2陶瓷材料，而紧凑型刀片的基础部分为WC + Co硬质合金。紧凑型刀片的上部的厚度大于涂覆工具的涂层的厚度。因此，紧凑型刀片可充分利用陶瓷材料和硬质合金的优点，从而改善其机械性能和切削性能。

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