The tribological conditions between tools and sheet are the major factors affecting the product quality, forming limits and service life of tools in thin-walled titanium components warm forming. Using the orthogonal design based twist compression test in the temperature range of 25?300 ℃, the significant factors affecting the coefficient of friction (CoF) and the influencing rules in CP-3 titanium sheet warm forming are clarified and discussed by changing tribological conditions such as tool material, lubrication, temperature and normal pressure. The results show that the significant factors affecting the CoF are lubrication, surface roughness, tool material, sliding velocity, normal pressure and temperature; compared with unlubricated condition, the graphite and MoS2greatly improve the friction condition and the maximum reduction of the CoF is 0.318; the CoFs of Cr12MoV/CP-3 and QAl10-3-1.5/CP-3 tribo-pairs show a similar tendency: the CoFs increase with increasing surface roughness and sliding velocity, and increase firstly then decrease with increasing normal pressure and temperature.%板料/模具间的摩擦润滑条件是影响薄壁钛合金产品成形质量、成形极限和模具寿命的关键因素.利用压缩扭转摩擦方法,结合正交试验设计,改变模具材料、润滑状态、温度和压力等参数,研究热成形 CP-3 钛板和模具间摩擦因素的变化规律及作用机理.结果表明:影响 CP-3 板料温成形摩擦因数显著因素为润滑剂、模具粗糙度、模具材料、转速、压力和温度;相对于干摩擦,石墨和MoS2干膜润滑剂对板料/模具间摩擦的改善效果均很明显,摩擦因数最大降低了0.318;不同参数下Cr12MoV/CP-3和铝青铜(QA110-3-1.5)/CP-3摩擦因数的变化趋势基本相同,即随模具表面粗糙度和转速的增大而增大,随温度和压力的增加先增大然后减小.
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