摘要
在1.0×10^(17)至7.0×10^(17)ions/cm^2范围内等间隔选取七个注入剂量,用75keV氮离子疰入20钢,形成表面强化层。用TRIM算法计算了注入后的氮离子浓度分布及损伤分布,测试了注入前后材料表面硬度和摩擦性能的变化。X衍射结果表明,注入层出现γ′-Fe_2N和ε-Fe_3N-Fe_2N新相。辐射损伤、第二相。间隙固溶体等是引起表面强化的主要原因。
20 steel was implanted with nitrogen ions whose energy was chosen at 75keV and dose range was limited from 1.0×10(?) to 7.0×10(?) ions/cm(?). The surface strengthening layers were formed after ion implantation. The distributions of concentration and damage were given by TRIM program. The surface hardness and friction coefficient were measured for implanted and unimplanted samples. It was detetced that there were γ'-Fe_3^-N and δ-Fe_3^-N-Fe_2^-N phases in implanted layers by X-ray diffraction. The strength was believed to increase because of radiant damage, the second phases and interstitial solid solutions,
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
1993年第6期28-33,共6页
Ordnance Material Science and Engineering
关键词
离子注入
钢
表面强化
表面处理
ion implantation, 20 steel surface strengthening
