Dual-Phase Binder Cermet for High-Temperature Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cermets containing titanium lack sufficient wear and fracture resistance at high temperatures, particularly when used in high-speed cutting applications where they generate significant heat.
Innovation Solution
A cermet composition featuring a hard phase with carbonitrides of Group 4, 5, and 6 metals, including Ti, and a binder phase with specific mass ratios of W to Co and Ni, which includes a first binder phase with a W/(Co+Ni) ratio of 0.8 or less and a second binder phase with a ratio of 1.2 or more, enhancing both wear and fracture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cermet containing titanium as a major component is used, then wear resistance is enhanced, but fracture resistance at high temperature is insufficient
Solution Approach 1:
The invention changes the compositional parameters of the binder phase by specifying precise mass ratios of W to (Co+Ni) for both first and second binder phases. This parameter optimization enables the cermet to achieve both enhanced wear resistance and improved fracture resistance at high temperatures, resolving the contradiction between these two properties.
Solution Approach 2:
The invention uses a composite binder phase consisting of two distinct phases with different W/(Co+Ni) ratios. The first binder phase (W/(Co+Ni) ≤ 0.8) and second binder phase (W/(Co+Ni) ≥ 1.2) work synergistically to provide both wear resistance and fracture resistance at high temperatures, overcoming the limitations of single-phase binders.
2Productivity
If a cermet is used for high-speed cutting that generates high heat, then cutting capability is maintained, but the effect on wear resistance and fracture resistance is insufficient
Solution Approach 1:
By optimizing the mass ratios of W to (Co+Ni) in both binder phases, the invention enhances the high-temperature performance of the cermet. This allows the material to maintain both wear resistance and fracture resistance during high-speed cutting operations that generate significant heat.
Solution Approach 2:
The dual-phase binder structure with different W/(Co+Ni) ratios provides synergistic effects that enable the cermet to withstand high-temperature conditions during high-speed cutting while maintaining excellent wear and fracture resistance.
Data Source
AI summary
A cermet and a cutting tool are provided which have high wear resistance and high fracture resistance at a cutting edge even in a mode of cutting where the cutting edge comes to have a high temperature. A cermet 1 includes a hard phase 2 including a carbonitride of one or more kinds of metals selected from Group 4, Group 5, and Group 6 metals of the periodic table including at least Ti and a binder phase 3 containing W and at least one kind of a metal selected from Co and Ni, wherein the binder phase 3 includes a first binder phase 4 in which a mass ratio of W to a total amount of Co and Ni (W/(Co+Ni)) is 0.8 or less and a second binder phase 5 in which a mass ratio of W to a total amount of Co and Ni (W/(Co+Ni)) is 1.2 or more.