Theoretical Design and Application of Strengthening and Toughening of Cemented Carbides
Cemented carbides are indispensable in modern industry due to their various superior properties,but the contradiction between their hardness and toughness limits further performance improvement.Multi-scale material calculation methods integrate multi-scale theoretical models with key experiments,which ensure the efficient development of new materials and provide scientific support for the strengthening and toughening of cemented carbides.This article introduced theoretical methods such as first-principles calculations,thermodynamic and kinetic calculations,phase field simulations,and finite element simulations and demonstrated effective measures for the synergistic enhancement of strength and toughness in cemented carbides,including binder phase strengthening and toughening(nano-scale phase precipitation),hard phase strengthening and toughening(spinodal decomposition),and microstructure optimization(surface gradient structures and whisker toughening).It also discussed the efficient enhancement of cemented carbide performance through a combination of theoretical design and key experimental validation.Multi-scale material calculation methods can provide a theoretical basis and practical guidance for designing and preparing high-strength and high-toughness cemented carbide materials.In the future,it is necessary to further study the intrinsic mechanisms of material microstructure evolution and its structure-property relationships on this basis,so as to promote innovation and progress in the development of cemented carbide materials.
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