风电轮毂用球墨铸铁的低温冲击韧性研究  

Toughness of a Cold-resistant Nodular Iron for Wind-driven Generator Hub

作　　者：徐建辉[1] 刘煊[2] 龙文元[2] 

机构地区：[1]上海电机学院机械学院,上海201306 [2]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《铸造工程》2016年第3期1-4,共4页Foundry Engineering

基　　金：上海市教育委员会科研创新项目（12ZZ199）资助.

摘　　要：通过对附铸试样进行不同温度下的夏比摆锤冲击试验，测定了低温球墨铸铁的韧脆转变温度，同时对低温球铁轮毂铸件进行了取样分析。研究结果表明：该型号低温球墨铸铁的FTE约-50℃，因此，以该低温球墨铸铁-40℃时的冲击性能来评价铸件；轮毂铸件大部分区域的性能都符合指标要求，局部薄壁处性能偏低，这主要是由于其球化率较差、珠光体含量超过10%或含有明显微疏松的试样。By Charpy pendulum impact test of the casting samples at different temperatures, the ductile-brittle transition temperature of cold-resistant nodular iron was determined, and the sampling of the cold-resistant nodular iron hub casting was analyzed. The results show that the FTE of cold-resistant nodular iron is -50℃, so the impact properties of cold-resistant nodular iron hub casting was evaluated at a low temperature of -40℃. Most sampling of the hub casting most achieve its performance requirements, but the performance of thin-walled is low. It is mainly due to its low nodularity, Pearlite content exceeding 10 % or microporosity.

关 键 词：低温球墨铸铁 石墨球 组织 力学性能 

分 类 号：TG115.5[金属学及工艺—物理冶金]