微量元素对Cr-Ni-Mn-N奥氏体抗氢钢微观凝固偏析的影响  

EFFECT OF TRACE ELEMENT ON THE MICROSEGREGATION IN Cr-Ni-Mn-N AUSTENITIC STEELS

作　　者：谭军[1] 马禄铭[1] 梁国军[1] 李守新[1] 李依依 

机构地区：[1]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110015

出　　处：《金属学报》1999年第8期809-815,共7页Acta Metallurgica Sinica

摘　　要：利用金相法和电子探针研究了微量元素P,C，Si和Nb对采用低偏析均质化技术炼制的Cr一Ni一Mn一N奥氏体抗氢钢凝固组织和微观偏析的影响,结果表明，降低P，C及Si的含量有利于Cr-Ni-Mn-N奥氏体凝固组织枝晶细化，Nb保持适当的含量对枝晶细化有利，分别减少P，C，Si和Nb在实验钢中的含量不仅能大幅降低元素自身的偏析。The metallographic examination and eletron probe analysis have been carried out to investigate the effect of trace element(P,C,Si,Nb) on the solidification microstructure and the solidification microsegregation in Cr-Ni-Mn-N austenitic hydrogen resistant steels. The results show that lowering the contents of P,C and St is beneficial to the formation of fine dendrite in the Cr-Ni-Mn-N steels,but for element Nb, there is an appropriate content. Respective reduction of P,C,Si and Nb not only can decrease the segregation of the element itself greatly, but aslo can influence the segregation of other elements in differrent degrees.

关 键 词：微量元素 偏析 枝晶 奥氏体抗氢钢 

分 类 号：TG142.25[一般工业技术—材料科学与工程]