表面无立方相层功能梯度硬质合金的研究进展

Advance in functionally graded cemented carbides with cubic carbide free layer

综述了目前应用于涂层基体的无立方相层含氮功能梯度硬质合金的研究进展;详细介绍无立方相层的形成热力学基础、梯度结构特征、机理和动力学研究进展以及力学性能和切削性能;重点评述C、N含量以及组分对无立方相层的影响规律;提出获取合金系统真实的热力学相图和动力学数据是今后研究工作的重点。

The advance in functionally graded cemented carbide containing nitrogen with cubic carbide free layer （CCFL）, which is used as coating substrate, was reviewed. Some aspects of CCFL were introduced in detail, including the thermodynamic foundation, the gradient structure features, formation mechanism and kinetic progress, mechanical properties and cutting performance. The effects of content of C, N and components on CCFL were commented. Focus on real thermodynamic phase diagrams and kinetic data in alloy system in the futta＇e research was proposed.