摘要
增材制造是于20世纪80年代中期发展起来的一门新兴技术,因能快速精确地制造出形状复杂的结构件而受到广泛关注。电弧增材制造是以电弧为热源,采用逐层堆焊的方式制造出致密的金属构件,具有制造成本低廉、成形效率高的突出特点,在大尺寸、复杂零件的快速成形技术中表现出明显的优势,因而在航空航天、汽车船舶等领域有广阔的应用前景。TC4的化学活性高、热导率低、强度高,具有优异的综合力学性能,是应用最广泛的钛合金。TC4并不适合采用传统的加工方法制备,因此采用电弧增材制造的方法成形TC4结构件。但成形件典型的宏观组织为外延生长的柱状晶,导致其力学性能存在各向异性。本文综述了电弧增材制造的发展历史,结合该技术的特征及国内外研究现状,介绍了电弧增材制造TC4钛合金成形件的组织及性能方面的研究进展。
Additive manufacturing as a novel technology have developed since the middle of 1980 s.More and more people focus on this technology since it can produce complex structures quickly and accurately.Wire and arc additive manufacturing technology adopts arc as heat source,and deposits the materials layer by layer.High deposition rates,low material and equipment costs,and the advantages in manufacturing large and complexity components that make wire and arc additive manufacturing technology widely used in aerospace industry,automobiles and ships.TC4 has become the most widely used titanium alloy due to the excellent comprehensive properties.The properties such as low thermal conductivity,high strength and high chemical activity of TC4,which make it difficult to fabricate the components by traditional manufacturing technologies.Therefore,the TC4 is manufactured by WAAM.However,the typical macrostructure of the WAAMed components is the epitaxially grown columnar grain,which leads to anisotropy in its mechanical properties.In present work,the development history of wire and arc additive manufacturing technology is introduced.Combining its characteristics and the research status at home and abroad,the study on the microstructure and mechanical properties of TC4 titanium alloy manufactured by wire and arc additive manufacturing technology is introduced.
作者
杨海欧
王健
周颖惠
王冲
林鑫
YANG Haiou;WANG Jian;ZHOU Yinghui;WANG Chong;LIN Xin(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2018年第11期1884-1890,共7页
Materials Reports
基金
国家重点研发计划(2016YFB0700301)
中国航天科技集团公司航天科技创新基金
关键词
电弧增材制造
TC4钛合金
宏观/微观组织
力学性能
wire and arc additive manufacturing
TC4 titanium alloy
macro/microstructure
mechanical properties
