石墨形态和数量对奥-贝球铁性能的影响  

Effects of Graphite Form and Amount on Performance of Austempered Ductile Iron

作　　者：许太平[1] 徐伟[1] 蔡彦强[1] 贾连杰[1] 

机构地区：[1]唐山轨道客车有限责任公司,唐山063035

出　　处：《价值工程》2013年第26期309-310,共2页Value Engineering

摘　　要：对于要求抗拉强度≥1200MPa;断后伸长率≥1%;吸收能量(无缺口试样)≥35J的奥-贝球铁,如果其球化率差于3级,球墨粗于6级且每平方毫米球墨少于180个,等温处理后的力学性能不易达到规范要求。For the austempered ductile iron as required by tensile strength ≥1200MPa, elongation after fracture ≥1% and energy absorption （sample without notch） ≥35J, if its spheroidization rate is lower than level 3, the spheroidal graphite is thicker than level 6 and its amount per mm2 is less than 180, its mechanical performance after isothermal treatment will be difficult to suit the specification requirements.

关 键 词：奥-贝球铁 石墨形态 强韧性 

分 类 号：TG143.5[一般工业技术—材料科学与工程]