摘要
用扫描电镜、透射电镜和电子探针研究Mg－Al复合变质奥─贝钢中共晶体的团球化结果表明，团球状共晶体是由于C、Mn、Si偏析，于凝固后期在奥氏体校晶间形成的渗碳体和奥氏体伪共晶组织，共晶体结晶时的异质核心是MgS．
Nodularization of eutectic in austenite-bainite steel modified by Mg and Al have been investigated by means of TEM,SEM and EPMA.Results show that the nodular eutectic is pseudo-eutectic of austenite and Fe3C, which is formed between austenite dendrites at the end of the solidification because of the segregation of C, Mn and Si. Nodularization of eutectic can be explained for heterogeneous nuclei and influence of modifying elements on the crystallization of the eutectic.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
1998年第4期390-394,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金!59671004
