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本文研究了利用挤压管坯冷轧钛及钛合金管材的工艺条件。研究证明,冷轧 OT-4和 BT-5-1钛合金管材时,内径减缩量不应超过(D_з)/(D_(тр)≤1.25～1.35。根据管径的允许减缩量,对于端部装料的ХПТ型冷轧机,心棒的锥度不应大于2tg α=0.015～0.02。冷轧时,压力值与强度极限成正比。冷轧钛合金的破裂现象,在很大程度上取决于减壁的同时管径的减缩,即取决于心棒的锥度。研究表明,BT-1-1合金径1个轧程的允许变形程度可达80%,OT-4合金—70%,BT-5-1合金-65%。设计孔型时,为实现高速度轧制钛及钛合金管材,送料量应取10～12毫米,取总延伸系数μ_∑=2.5～4。
This paper studies the use of extrusion tube cold rolling titanium and titanium alloy tube process conditions. It has been proved that when the OT-4 and BT-5-1 titanium alloy tubes are cold-rolled, the inner diameter reduction should not exceed (D_з) / (D_ (rtр) ≤ 1.25 ~ 1.35. According to the allowable reduction of the tube diameter, End-loaded ХПТ cold rolling mill, the taper of the mandrel should not exceed 2tg α = 0.015 ~ 0.02. When cold rolling, the pressure value is proportional to the strength limit. Cracking of the cold-rolled titanium alloy, to a large extent depends on Decreasing and reducing the diameter of the pipe at the same time depends on the taper of the mandrel.The results show that the allowable deformation of BT-1-1 alloy is 80% 5-1 alloy -65%. When designing the hole type, in order to achieve high-speed rolling of titanium and titanium alloy pipe, the feeding amount should be 10 to 12 mm, take the total extension coefficient μ_Σ = 2.5 ~ 4.