作　　者： ; ; (崔平）; (王平）;

机构地区： 北京师范大学核科学与技术学院低能核物理研究所

出　　处： 《中国核科技报告》 1999年第S4期296-304,共9页

摘　　要： 透射电子显微镜观察表明,经过Ti注入的钢,表面形成了直径为3.5～20nm的FeTi_2相,镶嵌在注入层中,其平均直径为8nm。靶温在400℃注入时,这些纳米相出现在位错和晶界处。这种镶嵌的结构具有很强的抗磨损特性和抗腐蚀特性。经过退火后,这种结果将发生变化。在350～500℃退火20min后,其结构没有明显的变化,但是注入层的硬度得到了明显的提高。经过500℃退火后,表面硬度最高。说明退火能有效地增强表面强化效果。当退火温度为750℃和1000℃时,位错和晶界消失,纳米相平均直径分别增加到10 nm和15 nm。其平均密度分别为8.8×10^(10)/cm^2和6.5×10^(10)/cm^2。注入硬度明显下降,说明基体软化。 Observation of transmission electron microscope indicated that the phase of FeTi2 with 3.5-20 nm in diameter is embedded in high energy Ti implanted layer. It’s average diameter is 8 nm. The nano-meter phases were embedded among dislocations and grain boundary in Ti implanted steel at 400 C. The wear resistance has been improved. The embedded structure can be changed obviously after annealing. The structure has been changed slightly after annealing at annealing temperature raging from 350 to 500 C, howevei, the hardness and wear resistance of implanted layer increased greatly. The maximum of hardness is obtained when the sample was annealed at 500 C for 20 min. It can be seen that the strengthening of implanted layer has enhanced by annealing indeed. The grain boundary and dislocations have disappeared; the diameter of nano-meter phases increased from 10 nm to 15 nm after annealing at temperature of 750 C and 1000 C respectively. The average densities of nano-meter phases are 8.8X 1010/cm2 and 6.5X10/cm2 respectively for both of annealing temperature. The hardness decreased obviously when the annealing temperature is greater than 750 C.

关 键 词： 纳米相 镶嵌结构 钢 注入层 离子注入 透射电子显微镜照片 退火温度 析出相 表面硬度 纳米结构

领　　域： [核科学技术]