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本文的目的是探索通过控制锻造热力学参数消除α+β两相钛合金锻件及棒材中存在的低倍组织缺陷的方法。研究结果表明,原始棒材中的低倍粗晶往往是形成锻件低倍粗晶的原因。在β再结晶原理基础上,利用正交试验方法,调整热力学参数,找到了消除低倍粗晶、高倍魏氏组织的途径。当β退火后采用水冷时,β退火加热温度建议取在(α+β)/β转变点以上10～20℃;采用空冷时,取在(α+β)/β转变点以上5～15℃。锻方拔成(成品锻)前加热温度建议取在(α+β)/β转变点以下20～30℃,β退火保温时间以0.6～0.8min/mm为宜。变形程度应大于50％～60％。
The purpose of this paper is to explore ways to eliminate low magnification defects in α + β two-phase titanium forgings and bars by controlling forging thermodynamic parameters. The results show that the coarse grains in the original bar are often the reason for the formation of coarse asperities. Based on the principle of β-recrystallization, orthogonal experimental methods were used to adjust the thermodynamic parameters to find out ways to eliminate the low-coarse-grained and high -weighted Widmanstatches. When water cooling is used after β annealing, the heating temperature of β annealing is recommended to be 10 to 20 ° C above the (α + β) / β transition point, and 5 to 15 ° C above the (α + β) / β transition point . It is recommended that the forging temperature be 20 ~ 30 ℃ below the (α + β) / β transition point and the β annealing time should be 0.6 ~ 0.8min / mm. Deformation should be greater than 50% to 60%.