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研究了轧制变形率和O含量对TA5-A合金板材的组织、力学性能的影响,探索满足GJB944-90标准要求的海洋工程用TA5-A合金板材的加工技术。结果表明:随着氧含量的增加,板材的抗拉强度增大,而冲击韧性值则是先增大后减小,当氧含量为0.12%~0.14%时,退火后的板材强度和韧性匹配良好;在变形率89%~96%热轧后650℃×60 min退火,TA5-A钛合金中厚板材力学性能完全满足GJB944-90标准要求。
The effects of rolling deformation rate and O content on the microstructure and mechanical properties of TA5-A alloy sheet were studied. The processing technology of TA5-A alloy sheet for marine engineering that meets the requirements of GJB944-90 standard was explored. The results show that with the increase of oxygen content, the tensile strength of the sheet increases, while the impact toughness value first increases and then decreases. When the oxygen content is 0.12% ~ 0.14%, the strength and toughness of the annealed sheet match Good; After the deformation rate of 89% ~ 96% hot-rolled at 650 ℃ × 60min annealing, TA5-A titanium alloy plate mechanical properties fully meet the GJB944-90 standards.