Effects of metal phases and carbides on the microstructure and mechanical properties of Ti(C,N)-based cermets cutting tool materials

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

“…The metal powders of Mo, Ni or Co are introduced as the binder, which can bond the ceramic phases and contribute to the ductility and toughness of cermets [8][9][10]. The secondary carbides such as Mo 2 C, WC, TaC or NbC are usually added to improve the sinterability, abrasion resistance or thermal shock resistance of cermets [4,[11][12][13].…”

Effect of heating rate on the mechanical properties and microstructure of Ti(C,N)-based cermets

“…Ti(C,N)-based cermets have been widely used as high-speed cutting tools due to their excellent properties such as high temperature hardness, wear resistance, chemical stability, thermal conductivity and thermal deformation resistance [1][2][3][4]. They have been successfully applied to the semi-finishing and finishing of stainless steels and carbon steels, and can improve the surface finishing compared with WC-Co cemented carbides, ensuring excellent chip formation, tolerance control and dimensional accuracy of the workpieces [5,6].…”

“…It is known that variant microstructures of core-rim-binder phase can result in different final mechanical properties of Ti(C,N)-based cermets [9][10][11]. So far, many researches [1,5,12] have been conducted to obtain the Ti(C,N)-based cermets with good microstructure and superior performance by optimizing sintering temperature and holding time. However, few researches [13] about the effect of heating rate on the microstructure and mechanical properties of Ti (C,N)-based cermets have been reported.…”

Effects of metal phases on microstructure and mechanical properties of microwave‐sintered Ti(C, N)‐based cermet tool

“…According to the dissolution-reprecipitation theory and Figure 1C, the content of Ti decreased sharply to 42.77%, while the content of Ni, Co, Mo, and W all increased. It can be concluded that the outer rim was formed during liquid-phase sintering, and consisted of solid solution (Ti, W, Mo)(C, N)-Ni-Co. 10 Figure 2 gave the micrographs of the samples with different content of metal phases. It was considered as a solid solution (Ti, W, Mo) (C, N) that was relatively rich in heavy elements, like W and Mo.…”

“…7 At present, the most commonly used metal phases in traditional sintered Ti(C, N)-based cermets were Ni, Co, Mo, Fe, Cr, and so on. 10 Furthermore, Rafiaei et al 11 reported that when the metal binder was Ni, the microstructure was mainly composed of small cores due to the high solubility of Ti. However, Ni metal phase also had shortcomings in virtue of its poor wettability with ceramic particles.…”