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利用热压扩散焊接法法制备钛-钢复合材料。采用用扫描电镜、EDS分析、拉剪试验和三点弯曲试验等方法,研究了扩散焊接温度对钛-钢复合界面附近形貌、成分、界面剪切强度和弯曲性能的影响。结果表明:热压扩散焊接法在压力3 MPa,真空度≥10-3Pa,保温时间1 h,焊接温度≥820℃的条件下,有Ti、Fe原子相互扩散,可实现冶金结合;在焊接温度≥740℃条件下,钛钢界面的拉伸剪切强度都大于基体强度;在740~840℃的焊接温度下,抗弯曲性能随温度升高而先增大后减小,800℃的抗弯曲性能最强,达到29.71MPa。
Preparation of Ti-steel Composites by Hot-press Diffusion Welding. The effects of diffusion bonding temperature on the morphology, composition, interfacial shear strength and flexural properties near the interface of Ti-steel were investigated by scanning electron microscopy, EDS analysis, tensile shear test and three-point bending test. The results show that Ti, Fe atoms diffuse into each other under the conditions of pressure 3 MPa, vacuum degree ≥ 10-3 Pa, holding time 1 h and welding temperature ≥ 820 ℃, The tensile shear strength of the interface of titanium steel is higher than that of the matrix at ≥740 ℃. The bending resistance first increases and then decreases with the increase of temperature at the welding temperature of 740 ~ 840 ℃. The bending resistance at 800 ℃ The strongest performance, reaching 29.71MPa.