航空用TA18管材加工工艺研究

通过选用不同成分配比的TA18管材,对其进行轧制,在不同变形量、不同退火温度下,研究其成分、变形量、退火温度与力性之间的关系,得出了不同成分与力性的关系、不同变形量与力性的关系曲线、不同退火温度与力性的关系曲线,发现其成分中V,Al含量的变化对力性会产生不同的影响,Al对强度的提高和塑性的下降影响较大;当化学成分(质量分数,%)在一定的范围(Al:2.8～3.2,V:2.30～2.70,O:0.07～0.09)时,利用基本相同变形量(50%～70%),且变形时Q≤1.14时,采取两种不同的退火制度(380～580℃,650～750℃),可以得到满足现有美标及军标标准要求的强度级别的TA18管材。

Study on Processing Technology of TA18 Titanium Tubes for Aviation

According to the deformation processing of TA18 titanium tubes of different compositions, deformation ratios and annealing temperatures, the relations of deformation ratio, annealing temperature, compositions and mechanical properties were studied and their relation curves were drawn. Results show that change of V and Al content has different effects on mechanical properties. Al content can produce a great effect on strength increase and plasticity decrease. When the composition is designed in definite ranges (Al: 2.8 wt%~3.2 wt%, V: 2.30 wt%~2.70 wt%, O: 0.07 wt%~0.09 wt%), Q value is not larger than 1.14 and similar deformation ratio (0%~70%) are confirmed, TA18 titanium tube can reach the strength level of AMS4946B and the military standard under two annealing systems (380~580 °C, 650~750 °C)