摘要
传统的多孔钛制备工艺存在缺陷,导致多孔钛材料的结构和性能难以重复和再现。本研究对选择性激光熔化(selective laser melting,SLM)成形的多孔纯钛与多孔石墨烯-钛(Gr-Ti)经500℃,30 min退火处理后,多孔纯钛与多孔Gr-Ti复合材料的物相均与SLM成型的多孔钛保持一致。多孔纯钛的组织由条纹状α’相转变为等轴α相,同时晶粒的各向异性消失;添加石墨烯后的多孔钛由条纹状α’相转变为等轴α相,生成的碳化钛弥散分布于钛基体中,且由于退火温度较低,基体中仍保留有石墨烯。热处理后多孔纯钛与多孔Gr-Ti显微维氏硬度均降低,多孔Gr-Ti热处理后抗压强度提高到345 MPa,比热处理前多孔钛的强度提升9.2%。热处理后多孔Gr-Ti材料耐腐蚀性能降低。
The traditional fabrication process for porous titanium has certain flaws,which results in difficulty in replicating and reproducing the structure and properties of porous titanium materials.In this study,after the annealing treatment of porous titanium,no phase transition occurs in either the porous pure titanium formed by selective laser melting(SLM)or the porous titanium with added graphene.The microstructure of the porous pure titanium transforms from a lamellarα′phase to an equiaxedαphase,and the grain anisotropy disappears.For porous titanium with added graphene,the transformation occurs from a lamellarα′phase to an equiaxedαphase.The formed titanium carbide is dispersed throughout the titanium matrix,and residual graphene remains in the matrix due to the low annealing temperature.The mechanical and corrosion resistance properties of both the SLM-formed porous pure titanium and porous titanium with added graphene change after heat treatment.The Vickers hardness decreases,while the compressive strength of the porous titanium with added graphene increases to 345 MPa,a rise of 9.2%compared to that of the porous titanium before heat treatment.After heat treatment,the corrosion resistance of both the composite material with added graphene and the pure titanium material without graphene decreases.
作者
黄歆
亢宁宁
HUANG Xin;KANG Ningning(Fuzhou Technology and Business University,Fuzhou 350715,China;Western Metal Materials Co.,Ltd.,Xi'an 710201,China)
出处
《铸造技术》
CAS
2024年第2期148-156,共9页
Foundry Technology
基金
2020福建省中青年教师教育科研项目(科技类)(JAT201008)。
关键词
多孔材料
孔形状
增材制造
热处理
porous materials
hole shape
additive manufacturing
heat treatment
