单相区 1050 和 1100 ℃热穿孔均能顺利进行且顶头轴向力相差不大，为降低能耗，最终选择 1050 ℃作 为实际斜轧穿孔时的 Ti80 合金棒料初始温度。按照有

限元模拟给定的工艺参数，在实际狄舍尔穿孔机上进行物理实验，结果顺利穿制出 Φ85 mm×8 mm 规格的Ti80 合金无缝管坯，如图 所示。毛管内外表面光滑、

无明显可见缺陷。

The 1050 and 1100 ℃ thermal piercing in the single-phase zone can be carried out smoothly and the axial force of the tip is not much different. In order to reduce energy consumption, 1050 ℃ is finally selected as the initial temperature of the Ti80 alloy bar during the actual cross-rolling piercing. According to Finite element simulation of the given process parameters, physical experiments on the actual Discher puncher, the result is a smooth Φ85 mm × 8 mm Ti80 alloy seamless tube billet, as shown in the figure. The inner and outer surface of the capillary is smooth,There are no obvious defects.