超声滚压固接Ti/Al金属箔材性能试验研究
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摘要
通过超声振动作用使工具头滚压固接异种金属Ti/Al箔材.采用扫描电镜观测分析固接异质Ti/Al箔材的表面形貌微观组织结构.利用维氏硬度计测定不同压力和不同振子振幅条件下试样表面层的硬度值.应用摩擦磨损试验仪测定试件随时间变化摩擦系数的变化情况.结果表明,振子振幅一定的条件下,随着压力的增大,固接表面的晶体变得更加细小,表层形貌改善.压力一定的条件下,随着振子振幅的增大,试件表面起伏较为平缓.压力对于表面维氏硬度值的影响不大.在该研究设计的参数范围内,压力为1.5kN,振子振幅为30μm时,固接箔材性能最优.
The tool head is rolled and bonded to dissimilar Ti/Al foil by ultrasonic vibration.The surface morphology and microstructures of the bonded heterogeneous Ti/Al foils were observed and analyzed by scanning electron microscopy.Vickers hardness tester was used to measure the hardness of the surface layer of the sample under different bonding pressure and oscillator amplitude.Friction and wear tester was used to measure the change of friction coefficient of specimen with time.The results show that when the oscillator amplitude is constant,the crystals on the bonded surface become smaller and the surface morphology improves with the increase of the bonding pressure.With the increase of the oscillator amplitude,the surface undulation of the specimen is gentler when the bonding pressure is constant.Fixation pressure has little effect on surface dimension hardness.In the range of parameters designed in this study,when the clamping pressure is 1.5 kN and the oscillator amplitude is 30μm,the performance of the clamping foil is the best.
The tool head is rolled and bonded to dissimilar Ti/Al foil by ultrasonic vibration.The surface morphology and microstructures of the bonded heterogeneous Ti/Al foils were observed and analyzed by scanning electron microscopy.Vickers hardness tester was used to measure the hardness of the surface layer of the sample under different bonding pressure and oscillator amplitude.Friction and wear tester was used to measure the change of friction coefficient of specimen with time.The results show that when the oscillator amplitude is constant,the crystals on the bonded surface become smaller and the surface morphology improves with the increase of the bonding pressure.With the increase of the oscillator amplitude,the surface undulation of the specimen is gentler when the bonding pressure is constant.Fixation pressure has little effect on surface dimension hardness.In the range of parameters designed in this study,when the clamping pressure is 1.5 kN and the oscillator amplitude is 30μm,the performance of the clamping foil is the best.
引文
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[2] NORFOLK M,BARTHOLOMEW D,SIDLOSKY C.Weld assembly for ultrasonic additive manufacturing applications:US20150290711A1[P].2015-10-15.
[3]朱政强,吴宗辉,范静辉.超声波金属焊接的研究现状与展望[J].焊接技术,2010,39(12):1-6.
[4]刘晓光,蒋晓明,张理,等.薄质金属超声波焊接的研究现状与展望[J].电焊机,2017,47(8):53-59.
[5]焦飞飞,杨勇,李鹏,等.超声波金属快速增材制造成形机理研究进展[J].中国材料进展,2016,35(12):950-959.
[6]陈怀防,莫志扬,刘兰胜.超声波焊接的研究与展望[J].中小企业管理与科技(上旬刊),2014(10):186,188.
[7]张会霞,肖健,郭帅,等.基于多弧离子镀基体负偏压对复合膜层性能的影响[J].淮海工学院学报(自然科学版),2017,26(2):1-3.