摘要
研究了Ｎｉ，Ｃｒ，Ｍｏ，Ｓｉ，Ａｌ和Ｃｅ等元素对高镍奥氏体球墨铸铁高温性能的影响，并探讨了其影响机理，结果表明，Ｎｉ，Ｃｒ，Ｍｏ能显著地提高高温力学性能、抗氧化性能和抗热冲击性能，Ａｌ，Ｓｉ，Ｃｒ和微量稀土Ｃｅ能有效地提高抗氧化性能，Ｃｒ和Ｍｏ于晶界处形成碳化物，高温时阻碍晶界滑移及裂纹扩展。
The effects of alloying elements Ni,Cr,Mo,Si,Al and Ce on the high temperatureproperties of nickel austenitic ductile iron have been investigated and the mechanism con-cerned discussed.The tensile strength at high temperatures and the thermal shock resistanceof ductile iron with Ni,Cr,and Mo have been found to be increased while the oxidation re-sistance has been found to be improved significantly.The small skeleton carbides with Moand Cr formed in eutectic boundary limit the slip of crystal boundary and the crack exten-sion. The alloying elements Si,Ce and Al in particular,are segregated rich in the scaling.So the oxidation resistance can be increased remarkably with a very small amount of Al,
出处
《华中理工大学学报》
CSCD
北大核心
1995年第1期104-108,共5页
Journal of Huazhong University of Science and Technology
关键词
镍
奥氏体
球墨铸铁
高温
力学性能
high nickel austenitic ductile iron
alloying elements
mechanical properties at high temperatures
oxidation resistance
thermal shock resistance
.
