离心SHS陶瓷衬管铁过渡层的研究①
来源期刊:中国有色金属学报1996年第1期
论文作者:周美玲 李俊 王金淑 张久兴
文章页码:66 - 69
关键词:自蔓延高温合成; 陶瓷衬管; 铁过渡层; 显微组织
Key words:ceramic-lined; SHS ; Fe transition layer; microstructure
摘 要:对离心SHS(Self-propatating High-temperature Synthesis自蔓延高温合成)陶瓷衬管的铁过渡层组织结构及性能研究发现,铁过渡层与陶瓷层为“抛锚”结合,过渡层与基体层为冶金结合。对铁过渡层进行SEM、TEM及DEAX分析发现,Fe层中残存有未分离的陶瓷粒子,具有较高的位错密度及发达的亚晶组织,且发现了少量的索氏体和屈氏体组织,认为这是由于钢基体中的碳渗透到铁层中引起的。这些都是造成铁过渡层硬度较高甚至超过钢基体的原因。
Abstract: Investigation on the microstructure and properties of the ceramic-lined pipe shows that steel sub-strate joins metallurgically with Fe transition layer,which joins with ceramic layer by way of "drop anchor", so the bonding strength is high. There exist unsegregated ceramic particles,relatively high dislocation density,devel-oped subcrystal,a small amount of sorbite and troostite in the transition layer. Sorbite and troostite result from the penetration of carbon in steel substrate to Fe layer.