锰对无磁球墨铸铁组织和性能的影响  

Effect of Manganese on Microstructure and Properties of Nonmagnetic Ductile Cast Iron

作　　者：李明弟[1] 王志刚[1] 王远成[1] 李强[1] 贾贵平 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101 [2]青州惠泽新材料科技有限公司,山东青州261310

出　　处：《铸造技术》2014年第2期243-246,共4页Foundry Technology

基　　金：山东省科技发展计划(编号:2011GSF11611);济南市科技发展计划项目(编号:201102051)

摘　　要：利用金相显微镜、材料万能力学测试机和磁天平对无磁球墨铸铁的金相组织、力学性能和磁导率等进行了研究。结果表明:锰可以降低铁液中碳的饱和度,阻止碳的析出,促进奥氏体的形成,并与硅元素一起相互配合、相互制约,得到以奥氏体为主,渗碳体为辅的组织。当含锰量为9%,Si/Mn比为0.5时,无磁球墨铸铁的力学性能和磁导率达到最佳。The microstructure, mechanical properties and permeability of nonmagnetic ductile cast iron were analyzed by metallographic, mechanical properties testing machine and magnetic balance. The results show that manganese can reduce the saturation of carbon in molten iron, prevent the precipitation of carbon and promote the formation of austenite. The microstructure with austenite and little cementite can be obtained when adding manganese and silicon. The best mechanical properties and permeability of nonmagnetic ductile cast iron can be obtained when manganese is 9% and Si/Mn is 0.5.

关 键 词：无磁球墨铸铁 奥氏体 渗碳体 磁导率 

分 类 号：TG255[金属学及工艺—铸造]