摘要
高性能表面层制造是具有特殊功能性表面层结构零件的精密制造,体现了高性能零件性能与几何参数一体化制造的特点。依据功能性表面层结构零件的性能要求所设计的几何参数和材料特性,选择表面层加工制造方法,确定加工工艺载荷的物质与能量输入条件,通过减控加工工艺的几何、结构、物理、化学等多源耦合约束,构建主动协调的材料加工载荷的应力场、温度场和化学位场等(多)场环境,相应地揭示零件表面完整性变化关系内禀的加工过程印记,利用可控的表面完整性与高性能零件性能的关联模型,实现具有特殊功能性表面层的精密制造。高性能表面层加工制造原理的核心是表面完整性的形成机制、评价方法和调控作用,所提出的高性能表面层精密制造的体系框架,以基于知识方法取代实验迭代的试错法,可解决高性能制造的加工制造反问题。
High performance manufacturing by surface modification has been developed as a precise manufacturing process of creating a functional surface layer of desired properties on the components, which is characterized by an integrated manufacturing of both properties and geometries for the high-performance components. The manufacturing processes of surface modification may be pre-selected according to the geometry features and material characteristics designed on basis of the desired properties of the components with a functional surface layer. Subsequently, processing loads of such as thermal, mechanical, chemical nature or a combination of them can be determined with mass and energy input conditions from the selected surface modification techniques for the manufacturing. Due to reduced multi-source coupled constraints from geometrical, structural, physical and chemical aspects by the surface modification, an adjustable material loading can be derived for desired processing loads on which the material loading is a process-independent description of the processing loads by stress and stain field, temperature field and/or chemical potential field in the manufactured components. Correspondingly, an inherent correlation of surface integrity change to material loading by posting the process signatures can be established for the components. Finally, a precise manufacturing by creating a functional surface layer of desired properties on the components is thus achievable based on the relation model between controllable surface integrity and high performance. It is concluded that, the principle of high performance manufacturing by surface modification is essentially composed of surface integrity formation mechanism, assessment method and resulting properties improvement for high-performance components. The principal framework proposed for high performance manufacturing by surface modification is therefore promising to solve inverse problem of manufacturing based on a knowledge-based way rather than iterative way by trial and e
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2016年第17期187-197,共11页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50725519
51321004)
关键词
高性能制造
表面层
表面完整性
制造原理
加工制造方法
high performance manufacturing
surface layer
surface integrity： manufacturing principle
manufacturing process
