Directional regulating method for systematic tissue structure of high-strength high-toughness ultra-fine hard alloy material

Abstract

The invention discloses a directional regulating method for a systematic structure of a high-strength high-toughness ultra-fine hard alloy material. The method comprises the steps of establishing a researching platform for designing a hard alloy cutter substrate and a wearing-resistant coating microsturcture; performing directional regulating on distribution and dispersion of a crystal grain inhibitor and segregation thickness in a WC/Co interface according to a performance requirement; establishing thermodynamics information of a temperature interval, a solubility interval and phase stability in generating each deposit of a diamond coating, and researching influence of technical conditions such as precursor kind and component and deposition temperature and pressure to properties such as phase kind and component of the diamond coating; and based on a metastable phase graph of a pseudobinary CrN-AlN system and a phase change driving force of each phase, predicting the phase structure and the phase composition of sosoloid at different temperatures, thereby realizing phase field simulation of a CrAlN base coating spinodal decomposition process. According to the method of the invention, a cooperative function and a strengthening and toughening mechanism of the crystal grain growth inhibitor are disclosed in an atom scale, and furthermore directional regulating of the high-strength high-toughness ultra-fine hard alloy microstructure is realized through a thermal-dynamic analysis facility.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a method for directional regulation and control of the microstructure of a high-strength and high-toughness ultrafine cemented carbide material system. Background technique [0002] At present, due to the excellent mechanical properties of ultra-fine cemented carbide materials, they are widely used in metal processing, electronic industry, medicine and other fields, such as micro-drills, milling cutters, integral hole machining tools, precision machining tools for printed circuit boards, etc. Dies, tools for difficult-to-machine materials, etc. [0003] The microstructure of the material is the fingerprint of its state variables and the preparation process, and determines the change in performance. The preparation process of the coated carbide tool material with high-quality powder as the raw material is affected by many process parameters. The trial and error metho...

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Problems solved by technology

[0003] The organizational structure of the material is the fingerprint of its state variable and preparation process, and determines the change of performance. The preparation process of coated cemented carbide tool material with high-quality powder as raw material is affected by many process parameters. Only experience or traditional Development by trial and error will consume a lot of manpower and material resources

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