【摘要】 采用脉冲加压扩散连接工艺对TA17钛合金与0Cr18N i9Ti不锈钢进行了连接试验。利用液压万能试验机测试了接头拉伸强度,分析了脉冲加压扩散连接工艺参数对接头强度的影响。结果表明:当连接温度为1098K、脉冲最小压力Pm in=8MPa、脉冲最大压力Pm ax=50MPa、脉冲次数为20次、脉冲频率为0.5Hz时,加热速度vh=30K/s,冷却温度vc=5K/s,得到最高的接头拉伸强度为293MPa,连接所用的有效时间仅为220 s,实现了钛合金与不锈钢的高效良好连接。利用X射线衍射(XRD)及扫描电镜(SEM)分析了接头组成相及断口形貌,接头界面主要存在β-钛、Fe2Ti,FeTi,拉伸试验中β-钛的固溶体承担了主要的拉伸力。更多还原

【Abstract】 The titanium alloy TA17 and stainless steel 0Cr18Ni9Ti were bonded by using impact pressure diffusion bonding（IPDB）.The tensile strength was tested by using the hydraumatic universal testing machine.Effects of the technique parameters of IPDB on the joint strength were investigated.The results show that: at the bonding temperature of 1098K,the minimum impact pressure of 8 MPa,the maximum impact pressure of 50 MPa,the cyclic number of 20,the impact rate of 0.5 Hz,the heating velocity of 30K/s and the cooling velocity of 5 K/s,the high tensile strength of the joint is 293 MPa and the bonding time is only 220 seconds,thus the high efficiency and high strength bonding of the titanium alloy and stainless steel were realized.The phase and fracture characteristics were analyzed by X-ray diffraction and scanning electron microscopy.It is revealed that the formation of β-Ti,Fe₂Ti and FeTi in the interface of the titanium alloy-stainless steel joint.β-Ti Solid solution undertakes major part of tensile load in the tensile testing.更多还原