摘要
在Gleeble-1500热模拟机上测定了残余元素锡、锑对GCr15钢热塑性的影响,以及镧对残余元素的作用。用SEM及EDS观察研究了实验钢的断口形貌及在断裂处形成的夹杂物。结果表明,随着残余元素含量增加,GCr15钢的热塑性降低,镧可以与钢中较低含量的锑形成化合物,稀土元素可以降低残余元素对轴承钢热塑性的危害。实验还研究了镧对原奥氏体晶粒、变形后再结晶晶粒大小以及对淬火组织的影响,镧能细化变形后的晶粒大小以及随后的马氏体组织。
Effects of tin, antimony on hot ductility of GCrl5 steel as well as the effect of RE elements on tramp ones, were studied by simulator Gleeble-1500 and the fractures for tested steels were analyzed by using SEM and EDS. The results showed that with increasing content of tin and antimony elements, the hot ductility of GCrl5 steel was decreased. Lanthanum can reduce the harmfulness of tramp elements on the hot ductility of GCr15, which can react with antimony to form compound and segregate at grain boundaries. Lanthanum can refine the recrystallized austenite grain after deformation and subsequent martensite structure.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2007年第2期229-233,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金委
宝钢共设"钢铁研究联合基金"(50174005)资助项目
关键词
残余元素
热塑性
轴承钢
稀土
tramp elements
hot ductility
bearing steel
rare earths
