摘要
钛合金复杂构件在航空、航天等高端装备领域具有广泛应用,等温锻是实现这类构件成形成性一体化制造的有效手段。然而,钛合金复杂构件等温锻成形是多模具约束、多参数影响下的复杂过程,再加上构件的结构复杂性与钛合金材料的组织敏感性,成形中工件将经历复杂的温度历史和强烈的不均匀变形,可能导致充不满、流线紊乱和折叠等宏观缺陷以及相转变、动态再结晶和球化等复杂的微观组织演化,进而影响构件服役性能,制约了高性能精确成形制造的实现。为此,国内外学者针对钛合金复杂构件等温锻宏微观成形规律与调控开展了大量研究。从钛合金等温锻成形材料流动、宏观缺陷和组织性能演变规律等方面综述了相关研究进展,并总结了本领域研究仍面临的难题与挑战。
Titanium alloy complex components are widely used in various industries,such as aviation and aerospace. The isothermal forging is an effective method to achieve the integrated manufacturing of these components with excellent shape accuracy and mechanical performance. However,isothermal forging forming of titanium alloy complex components is a complex process under multi-die constraints and multi-parameters influence. Moreover,the structural complexity of component and the microstructure sensitivity of titanium alloy material make the workpiece undergo complex temperature history and strongly inhomogeneous deformation during the forming process. This may result in macro defects,such as under-filling,disordered streamline and folding,and complex microstructure evolutions,such as phase transformation,dynamic recrystallization and globularization. Then the service performance of components is influenced and the realization of precise forming manufacturing with high performance is restricted. To this end,lots of researches conduct on the macro and micro forming rules for titanium alloy complex components by scholars at home and obroad. The research progresses in the material flow,macro defects,evolution rule of microstructure and properties were reviewed,and the problems and challenges in this field were summerized.
作者
高鹏飞
于超
雷珍妮
詹梅
GAO Peng-fei;YU Chao;LEI Zhen-ni;ZHAN Mei(Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第7期21-32,共12页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51875467)
中国科协青年人才托举工程(2018QNRC001)
凝固技术国家重点实验室(西北工业大学)自主研究课题(2019-TS-10)。
关键词
钛合金复杂构件
等温锻
宏观缺陷
微观组织演化
titanium alloy complex components
isothermal forging
macro defects
microstructure evolution
