珠光体含量对球墨铸铁疲劳性能的影响  

Influence of the Pearlite Content on Fatigue Characteristics of Ductile Iron

作　　者：李宏[1] 薛亦渝[2] 万仁芳[3] 

机构地区：[1]武汉化工学院机械工程系,湖北武汉430074 [2]武汉汽车工业大学材料科学与工程学院,湖北武汉430070 [3]东风汽车公司铸造一厂,湖北十堰442048

出　　处：《机械工程材料》2000年第6期25-26,35,共3页Materials For Mechanical Engineering

基　　金：国家"九五"重点科技攻关资助项目! (96 - A 0 8- 0 1- 0 7)

摘　　要：珠光体含量对球墨铸铁的疲劳性能有显著影响。对三种不同珠光体含量的球墨铸铁的疲劳性能进行了研究 ,测出 QT60 0 - 3、QT70 0 - 2和 QT740 - 3的疲劳强度 ,并绘出了各自的 S- N曲线。结果表明 :球墨铸铁中珠光体含量越高 ,疲劳寿命越长。The pearlite content of ductile iron play a predominant role in affecting the fatigue properties of ductile iron Fatigue strength of three different pearlite content ductile irons was investigated The fatigue strength of QT600 3,QT700 2 and QT740 3 were measured, and fatigue data were plotted as conventional S N curves and the best fit line were obtained for each iron The results show the higher pearlite content, the higher fatigue life

关 键 词：球墨铸铁 疲劳强度 珠光体 S-N曲线 汽车 曲轴 

分 类 号：TG143.5[一般工业技术—材料科学与工程] U464.133.3[金属学及工艺—金属材料]