不同Ni、Si含量对低温球墨铸铁组织和性能的影响  

Effect of Different Ni and Si Contents on Microstructure and Properties of Low Temperature Ductile Iron

作　　者：崔申 万曙雄 曹韩学[1] 赵伟龙 俞建良 励关国 CUI Shen;WAN Shuxiong;CAO Hanxue;ZHAO Weilong;YU Jianliang;LI Guanguo(School of Materials Science and Engineering,Chongqing University,Chongqing 400030,China;Goldwind Science&Technology Co.,Ltd.,Beijing 100176,China;Ningbo Rixing Foundry Co.,Ltd.,Ningbo 315702,Zhejiang China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400030 [2]金风科技股份有限公司,北京100176 [3]宁波日星铸业有限公司,浙江宁波315702

出　　处：《铸造工程》2024年第6期21-25,共5页Foundry Engineering

基　　金：2022年战略基础产品-风电“轴承与轮毂”(TC220H061)。

摘　　要：风电主机的升级换代对轮毂铸件使用的低温球墨铸铁抗低温冲击性能提出了更高要求。通过优化低温球墨铸铁QT400-18AL成分,研究不同Ni、Si含量对低温球墨铸铁组织和性能的影响,来选取能达到力学性能要求的镍和硅含量。试验表明,镍可以提高球墨铸铁的强度、硬度,但会降低其塑性;硅可以提高球墨铸铁的伸长率,但也会降低其强度和硬度;综上,当控制ω(Ni)0.6%、ω(Si)2.0%的添加量时,可获得低温球墨铸铁最佳的力学性能。The upgrading of wind power host puts forward higher requirements for low temperature impact resistance of low temperature ductile iron used in wheel hub castings.By optimizing the composition of low temperature ductile iron QT400-18AL,the effects of different Ni and Si contents on the microstructure and properties of low temperature ductile iron were studied,and the Ni and Si contents which could meet the mechanical properties requirements were selected.The results show that nickel can increase the strength and hardness of ductile iron,but decrease its plasticity.Silicon can increase the elongation of ductile iron,but also reduce its strength and hardness;In conclusion,when the addition ofω(Ni)0.6%andω(Si)2.0%is controlled,the best mechanical properties of low temperature ductile iron can be obtained.

关 键 词：风电铸件 球墨铸铁 合金化 金相组织 力学性能 

分 类 号：TG143.5[一般工业技术—材料科学与工程]