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利用镍箔作中间层,在850℃下对经过高能喷丸表面自纳米化处理的TA17钛合金与0Cr18Ni9Ti不锈钢棒材进行了脉冲加压扩散连接,用SEM、EDS分析了接头微观组织与接头界面处Ni、Ti和Fe元素的分布特征,并根据菲克第二定律计算了Ni原子在钛合金中的扩散系数。结果表明,在短时间的扩散过程中,纳米化处理后Ni原子在钛基体中扩散系数是在常规粗晶钛基体中扩散系数的两倍,纳米化有利于原子间冶金结合。
The nickel foil was used as an intermediate layer, and TA17 titanium alloy and 0Cr18Ni9Ti stainless steel bar self-nano-treated by high-energy shot peening were impressed by pressure diffusion at 850 ℃. SEM and EDS were used to analyze the microstructure and interface Department of Ni, Ti and Fe elements of the distribution characteristics, and calculated according to Fick’s second law diffusion coefficient of Ni atoms in titanium alloys. The results show that in the short time diffusion process, the diffusion coefficient of Ni atoms in the titanium matrix after the nano-treatment is twice that of the conventional coarse-grained titanium matrix. Nanocrystallization favors the intermetallic metallurgical bonding.