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首页> 外文期刊>Journal of Manufacturing Processes >Influence of the Composition of WC-Based Cermets on Manufacturability by Wire-EDM
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Influence of the Composition of WC-Based Cermets on Manufacturability by Wire-EDM

机译：Wire-EDM对基于WC的金属陶瓷成分对可制造性的影响

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摘要

Tungsten carbide (WC) based cermets are widely used in applications where the demand for high-performance materials is essential. These materials are machined either by grinding or wire-EDM. In contrast to grinding, wire-EDM can be highly automated and allows the machining of complex shapes. A recent trend in the development of WC-based cermets is grain size refinement and more narrow grain size distributions of the starting powder material (WC, Co, Ni), which gives a higher hardness and abrasive wear resistance.rnThis paper describes the influence of composition and grain size (coarse, ..., micron) of WC-based cermets on manufacturability by wire-EDM. It is shown that the cutting rate decreases with increasing WC-grain size, which can be explained mainly by the change in thermal conductivity of the material. Further, the toughness of the base material has an important influence on the bending strength of the EDM-machined samples. Finally, the experiments show that for all investigated materials, the EDM material removal mechanism is mainly melting, while other mechanisms like spalling have not been recognized.
机译：碳化钨（WC）基金属陶瓷广泛用于对高性能材料有重要要求的应用中。这些材料可以通过磨削或电火花线切割加工。与磨削相反，电火花线切割可以高度自动化，并可以加工复杂的形状。基于WC的金属陶瓷的最新发展趋势是细化晶粒和原料粉末材料（WC，Co，Ni）的晶粒分布更窄，从而提供了更高的硬度和耐磨性。线切割法制造的基于WC的金属陶瓷的组成和晶粒尺寸（粗，...，微米）。结果表明，切削速度随WC晶粒尺寸的增加而降低，这主要可以通过材料导热系数的变化来解释。另外，基材的韧性对EDM加工后的样品的弯曲强度具有重要影响。最后，实验表明，对于所有研究的材料，EDM的材料去除机制主要是熔化，而其他机制（例如剥落）尚未被认识到。

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