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透射电子显微镜观察表明 ,经过Ti注入的钢 ,在注入层中形成了直径为1 0～ 30nm的FeTi和FeTi2 相 ,其长度大约为 1 5 0～ 32 0nm .用扫描电子显微镜观察结果显示 ,表面形成了连续树枝状结构 .这种致密的结构具有很高的抗磨损特性和抗腐蚀特性 .电化学测量结果表明 ,随注入剂量的增加 ,腐蚀电流密度明显的下降 ,用 3× 1 0 18cm-2 剂量的Ti注入比未经注入的H1 3钢降低了 88%～ 95 % ,而用 6× 1 0 17cm-2 注入再经过 5 0 0℃退火 2 0min后 ,其腐蚀电流密度极大的下降 ,其值比未注入的样品腐蚀电流还小 98%～ 99% ,扫描电子显微镜观察表明 ,经过 40个周期电位扫描腐蚀后 ,表面未出现腐蚀坑 ,说明经过退火后 ,形成了具有优异抗腐蚀特性的改性层
Transmission electron microscopy showed that the Ti-infiltrated steel formed FeTi and FeTi2 phases with a diameter of 10 ~ 30nm in the implanted layer with a length of about 150 ~ 3200nm.The results of scanning electron microscopy showed that the surface Forming a continuous dendritic structure.This compact structure has a high anti-wear properties and corrosion resistance electrochemical measurements show that with the injection dose increases, the corrosion current density decreased significantly with 3 × 10 18cm- The Ti implantation at 2 doses decreased by 88% -95% compared with H1 3 without injection. However, after 6 × 10 17 cm-2 injection and annealing at 500 ℃ for 20 minutes, the corrosion current density decreased greatly , Which is 98% -99% smaller than that of the non-implanted samples. Scanning electron microscopy (SEM) shows that after 40 cycles of potential scan corrosion, no corrosion pits appear on the surface, indicating that after annealing, an excellent corrosion resistance Properties of the modified layer