中文摘要：

TLM是一种新型近β型钛合金,具有较低弹性模量、中高强度、高疲劳强度、高塑韧性、良好耐磨性以及耐腐蚀性,可以生产各种规格的细径薄壁管材,在交换器、阀门、高压气管、油管等领域有着广阔的应用前景。将其制成弯管,其应用领域还会扩大。而通常的弯管生产方法主要用于相对弯曲半径Rx≥1.5的弯管,对于相对弯曲半径Rx<1.5的弯管(即小曲率弯管),存在着拉应变和压应变变化大,壁厚变化率大,加工过程不容易控制等因素,严重影响着细径薄壁管材的应用。通过对管材弯曲过程受力变形进行分析,控制回弹,设计模具和改进加工工艺,对相对弯曲半径Rx≈1.1的TLM钛合金细径薄壁管材进行90°和180°弯曲,对其外形和其各种参数进行测量。试验结果表明,自行设计的模具可顺利地完成新型近β型钛合金细径薄壁管材的小曲率弯管,为生产提供了一定的参考价值。

英文摘要：

TLM was a novel near β-type titanium alloys,with a lower elastic modulus,high strength,high fatigue strength,high-plastic toughness,good wear and corrosion resistance,so it could produce all kinds of thin-walled tubing with small diameter,and had broad application prospects in switches,valves,high pressure trachea,tubing and other fields.When it was made to bend,its application fields would be larger.The usual working methods of bends were mainly applied to that with relative bending radius Rx≥1.5,and the b...