摘要
针对钛合金空心结构制造的技术难题,开发了一种基于热等静压工艺的制备方法,采用对结构构成要素的分解、加工与组合,并在空腔部分填充内包套的工艺途径,在工艺参数为800~920℃、100~200MPa、1~3h条件下,制备出钛合金矩形、锥形、筒形空心结构件,并进行了外形、扩散质量、界面组织分析和力学性能测试。研究表明,空心结构件中扩散连接界面焊合率达到100%,界面结合强度最高达到980MPa以上,与母材钛合金的强度水平相当,且拉伸断口为韧性断口,从而验证了该方法的工艺可行性与实用性,为该项技术在航空航天领域的应用奠定了基础。
In order to fabricate a type of titanium hollow structure, a new process is developed based on hot isostatic pressing （HIP）. The hollow ring structure is first decomposed into the skin plus ribs structure, then these substructures are combined together with adding a internal package into the hollow space. After HIP process, rectangular, cylindrical and conical hollow structures are fabricated, under 800-900℃ /100-200MPa/1-3h. The quality of this part is analyzed through profile examination, interface microstructure analysis and mechanical performance test. The results show that the interfacial diffusion bonding ratio of hollow structures almost reaches 100%, and the highest bonding strength reaches more than 980MPa, which is equal to the base metal. The fracture profile of diffusion bonding interface tensile samples shows ductile properties, and the feasibility of this new process is verified, which will provide reference for aerospace applications.
作者
赵冰
廖金华
韩秀全
侯红亮
李志强
ZHAO Bing;LIAO Jinhua;HAN Xiuquan;HOU Hongliang;LI Zhiqiang(AVIC Manufacturing Technology Institute,Beijing 100024,China;Aeronautical Key Laboratory for Plastic Forming Technologies,Beijing 100024,China;Beijing Key Laboratory of Digital Plasticity Forming Technology and Equipment,Beijing 100024,China)
出处
《航空制造技术》
2018年第18期36-42,共7页
Aeronautical Manufacturing Technology
关键词
热等静压
钛合金
空心结构件
扩散连接
力学性能
HIP
Titanium alloy
Hollow structure
Diffusion bonding
Mechanical property
