Computer simulating the diffusion behavior of V and W in Co binder layer of WC–Co cemented carbide

Different effects of Cr3C2 and VC on the sintering behavior of WC–Co materials

“…In this process, cobalt plays a role in promoting the reaction by facilitating vanadium atom transportation through the cobalt phase to WC surface, which is possible since vanadium has good solubility in cobalt within this temperature range based on the Co-V phase diagram [20] and the doping level (0.17wt%) of VC in this study is below the limit of solid solution of V in cobalt phase. Further, based on literature data, the diffusion of V in solid cobalt has lower activation energy 175,600 J/mole [22] comparing with the activation energy 266,102 J/mole [23] of Cr diffusion in solid cobalt. Therefore, the dissolution of VC particle in solid cobalt should be faster than the dissolution of Cr 3 C 2 particle in solid cobalt due to the lower diffusion activation energy.…”

Effect of the Cubic Phase Distribution on Ultrafine WC–10Co–0.5Cr–xTa Cemented Carbide

“…Due to the unique combination of excellent hardness, wear resistance, toughness, and strength, WC–Co‐based cemented carbides are widely used in industry as cutting tools, wear parts, and in machining and mining applications . It is well‐known that the hardness and strength as well as the wear resistance of WC–Co materials can be further improved by decreasing the WC grain size down to the submicrometer or nanometer scales . Until now, the most successful way to control the grain growth of WC is to add a small amount of grain growth inhibitors, such as Cr 3 C 2 , VC, TaC, NbC, and so on .…”

“…[1][2][3][4][5][6][7][8] It is well-known that the hardness and strength as well as the wear resistance of WC-Co materials can be further improved by decreasing the WC grain size down to the submicrometer or nanometer scales. [9][10][11][12] Until now, the most successful way to control the grain growth of WC is to add a small amount of grain growth inhibitors, such as Cr 3 C 2 , VC, TaC, NbC, and so on. [13][14][15][16] It was reported that the simultaneous addition of two types of grain growth inhibitors shows a better effect on grain growth inhibition than one individual inhibitor.…”

Carbon distribution in WC based cemented carbides

“…Let's estimate the diffusion of the carbon from the depths of cemented carbide onto the surface of the specimen during cooling. The diffusion rate of carbon in cobalt is [58][59][60][61].…”