800合金是一种含有量少但却富集起重大作用的碳,铝及钛元素的奥氏体Fe-Ni一Cr钢。根据牌号为800H,800HT和8000LC合金而进行特殊改进的800合金在这些元素的含量浓度方面是不同的。这些商业合金都已进行过研究,而800合金是另外添加了0.09％(质量百分数)磷和0.04％硫。利用放射性跟踪法以及剩余放射性强度度量法来测定这些合金在800-1100℃温度范围内~(59)Fe的内部和晶界扩散。自动放射线照相术证实可够利用Suzuoka逼近法发 800 alloy is an austenitic Fe-Ni-Cr steel with a small but concentrated carbon, aluminum and titanium content. The 800 alloys, specially modified according to grades 800H, 800HT and 8000LC, differ in the content concentrations of these elements. These commercial alloys have been studied, while the 800 alloy is additionally added 0.09 mass% phosphorus and 0.04% sulfur. The internal and grain boundary diffusion of ~ (59) Fe in these alloys at 800-1100 ℃ was measured by radioactive tracking and residual radioactivity intensity measurement. Automated radiography confirmed that the Suzuoka approximation method can be used