摘要
研究Ti-6Al—4VELI化学成分中Fe和O含量（A，B组），热处理制度：退火温度和时间（C，D组）等四个因素分别对脊柱顶丝类医用钛合金Ti-6Al-4VELI棒材力学性能的影响，设计并进行了相应的4因素3水平正交实验。通过对上述实验所得基本力学性能数据的分析，结果表明：在各因素水平变化范同之内，强度以高。含量（B组）的Ti-6Al-4VELI最高，其对强度影响大小的次序为：氧含量、铁含量、退火温度和退火时间；而塑性则以退火时间为D3组时最高，其对断后伸长率影响由大到小次序为：铁含量（退火时间）、退火温度、氧含量；同时硬度则以高氧含量组的最高，其对硬度影响由大到小的次序则为：氧含量、铁含量、退火时间和退火温度。当Fe含量控制在0．2％，0含量控制在0．13％左右的Ti-6Al—4VELI钛合金，采用650-700℃／1．5h退火处理时，可获得强度（Rm〉1050MPa，R00，Rp0．2〉960MPa）性似〉15％，Z〉50％），硬度（HV〉310）N想的综合性能优异作为脊柱顶丝类医用的高强韧性Ti-6Al-4VELI钛合金棒材。
The chemical composition and mechanical properties of biomedical Ti-6AI-4V titanium alloy for the spine obtained from foreign manufacturer （Sweden） and domestic manufacturer were analyzed in order to study the effect of following four factors such as the content of Fe and O elements（Group A, B） in the Ti-6A1-4V（ELI）, the heat treatment system, the annealing temperature and time （Group C, D） on the mechanical properties. The orthogonal experiment of four factors and three levels was designed and carried on. By analyzing the above experimental data, it is suggested that the strength of high oxygen-content （Group B） is highest, and the influence ability of these four factors decreases in the following order：content of O〉content of Fe〉 annealing temperature〉annealing time; the percentage elongation after fracture of long annealing time （Group D3） is highest, and the influence ability of these four factors decreases in the following order： content of Fe（annealing time）〉annealing temperature〉 content of O; meanwhile, the hardness of high oxygen-content （Group B） is highest, and the influence ability of these four factors decreases in the following order： content of O〉content of Fe〉annealing time〉annealing temperature,during the change range of the various factors. The excellent comprehensive properties of Rm 〉1050 MPa, Rp0.02〉960 MPa,A〉15%, Z 〉50%, hardness〉300 HV of biomedical Ti-6A1-4V titanium alloy for the spine can be obtained, when the content of Fe and O is about 0.20% ,0.13%. The annealing temperature and annealing time are controlled as 650- 700 ℃ for 1.5 h, respectively.
出处
《热加工工艺》
CSCD
北大核心
2014年第4期98-102,共5页
Hot Working Technology
