微合金化对厚断面高锰钢铸件中夹杂物形成的影响  

Effect of Microalloying on Formation of Inclusions in Heavy Section High Manganese Steel Casting

作　　者：傅排先[1] 康秀红[1] 夏立军[1] 李殿中[1] 李依依 

机构地区：[1]中国科学院金属研究所,沈阳材料科学国家(联合)实验室,辽宁沈阳110016

出　　处：《铸造》2010年第12期1337-1340,共4页Foundry

基　　金：中国科学院振兴东北老工业基地项目(DB2X-1-010)

摘　　要：利用钒、钛对高锰钢进行微合金化,研究钒、钛对厚断面高锰钢铸件中MnS夹杂物形成与分布的影响。结果表明:添加0.02%～0.1%钛和0.04%～0.1%钒能显著地细化高锰钢铸件中MnS夹杂物,并使之弥散分布。同时对高锰钢铸件中MnS夹杂的形成机制进行了研究,发现加入Ti,V与N反应形成高熔点的(Ti,V)N相,凝固过程中,先析出的(Ti,V)N相质点,成为后析出MnS的异质形核质点,使MnS得到细化,弥散分布,从而提高了铸件的力学性能。Effects of titanium and vanadium addition on the size and distribution of MnS inclusions in the heavy section high manganese steel were investigated.The sizes of MnS inclusions in high manganese steel frog point decreased dramatically by titanium（0.02%-0.1%）and vanadium（0.04%-0.1%）addition.The formation of MnS inclusions was discussed both in the traditional high manganese steel casting and microalloying high manganese steel casting.It indicated that the formation of the（Ti,V）N acted as heterogeneous nucleation sites for the formation of liquid MnS,which resulted in MnS inclusions in little sizes and uniform distribution,therefore the mechanical properties of the castings were improved.

关 键 词：厚断面高锰钢 夹杂物 形核 微合金化 

分 类 号：TG260[金属学及工艺—铸造]