热等静压增材制造Ti-6Al-4V/316L叠层双金属  

Fabrication of Ti-6Al-4V/316L laminated bimetals by hot isostatic pressure additive manufacturing

作　　者：朱瑞园 程焜 田春茂 郭瑞鹏 蔡超[1] 史玉升[1] ZHU Ruiyuan;CHENG Kun;TIAN Chunmao;GUO Ruipeng;CAI Chao;SHI Yusheng(State Key Laboratory of Materials Processing and Die and Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]华中科技大学材料成形与模具技术全国重点实验室,武汉430074 [2]太原理工大学材料科学与工程学院,太原030024

出　　处：《中国有色金属学报》2025年第2期515-528,共14页The Chinese Journal of Nonferrous Metals

基　　金：湖北省重点研发计划资助项目(2023BAB089);国防基础科研项目(JCKY2023204C033)。

摘　　要：本文提出一种热等静压增材制造(HIPAM)技术,采用增材制造离散堆积理念,将不同片层材料叠加后,通过热等静压扩散实现多材料零件成形,以Ti-6Al-4V/316L双金属为研究对象,研究Nb/Cu/Ni和Nb/Cu复合中间层对双金属界面组织与力学性能的影响。结果表明:Nb/Cu/Ni和Nb/Cu复合中间层可以有效阻止Fe与Ti原子之间的扩散和金属间化合物的生成,连接界面无明显缺陷;采用100μm厚度的Nb/Cu双层中间层试样具有最佳的抗拉强度(552.1 MPa),分别为钛合金和不锈钢基材的58%和85%,断裂位置在Cu箔处,断裂方式为韧性断裂。在最佳的中间层材料和厚度下,成功制备了钛/钢机匣缩比件,验证了HIPAM技术的工艺可行性与适用性,本研究结果为实现多材料构件的复合成形提供了有益参考。In this paper,a new technology of hot isostatic pressing additive manufacturing(HIPAM)was proposed,which adopted the concept of discrete stacking of additive manufacturing,the different sheet materials were stacked and joined by HIP diffusion to form a multi-material part.The effects of Nb/Cu/Ni and Nb/Cu composite interlayers on the interfacial structure and mechanical properties of Ti-6Al-4V/316L bimetal were studied.The effects of the types and thickness of Nb/Cu/Ni and Nb/Cu interlayers on the microstructure and tensile properties of the interfacial structures were investigated.The results show that,both Nb/Cu/Ni and Nb/Cu interlayers can effectively prevent the diffusion between Fe and Ti atoms,and no intermetallic compounds and obvious defects are observed at the interfaces across the joints.The samples jointed by Nb/Cu interlayer with thickness of 100μm have the best tensile strength of 552.1 MPa,which reaches 58%and 85%of those of the titanium alloy and stainless steel.The tensile specimens fail at the Cu foil,and fracture surfaces presents the typical ductile fracture mode.Under the optimal interlayer material and thickness,the titanium/steel casing was successfully fabricated,which indicating the feasibility and applicability of the HIPAM technology.The research results provide a useful method for the forming of multi-material components.

关 键 词：热等静压 增材制造 钢钛连接 元素扩散 中间层 

分 类 号：TG146.23[一般工业技术—材料科学与工程]