Sintering Mechanisms of Functionally Graded Cemented Carbides

Abstract

Functionally graded cemented carbides of two types are described. The functionally graded cemented carbides of the first type are of the WC-Co system and comprise gradients of WC grain sizes and/or Co contents. The functionally graded cemented carbides of the second type are Ti-and N-containing cemented carbides comprising gradients of nitrogen, cobalt and Ti-based cubic carbides. Special features and applications of the functionally graded cemented carbides of the both types are presented. Sintering mechanisms explaining the gradient formation in the functionally graded cemented carbides of the both types are summarized.

Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

“…The cemented carbide material having excellent hardness, good strength, and wear resistance, is widely used in machining fields such as metal cutting tools, wire drawing dies, and drill bits. [1][2][3] Because of the important role in the industry, how to prepare high-performance cemented carbide materials, especially the contradiction between the balance of hardness and fracture toughness, has been extensively studied, such as the development of new binders, the improvement of raw material powder sintering behavior and optimization of the sintering process. WC-Co has been widely used and developed owing to the excellent wettability of Co on WC.…”