铸态QT700-8重卡前接梁支架铸造工艺设计及生产实践  

Casting Process Design and Production Practice of As-Cast QT700-8 Heavy Truck Front Beam Support

作　　者：丁以刚 刘生发[1] 王振[1] 郭元洲 汪国昌 何强 王欣 DING Yi-gang;LIU Sheng-fa;WANG Zhen;GUO Yuan-zhou;WANG Guo-chang;HE Qiang;WANG Xin(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China;Hubei Danjiangkou Zhicheng Foundry Co.,Ltd.,Danjiangkou 442700,Hubei,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]湖北丹江口志成铸造股份有限公司,湖北丹江口442700

出　　处：《铸造》2023年第8期1031-1036,共6页Foundry

摘　　要：借助CAE软件对铸造工艺进行模拟优化,采用传统的粘土砂铸造工艺结合Si、Cu、Sn复合合金化成功生产了铸态QT700-8球墨铸铁重卡前接梁支架。使用光学显微镜(OM)及扫描电镜(SEM)等表征其显微组织和断口形貌。研究结果表明,基于CAE模拟结果对铸造工艺进行优化能减少样件调试次数,缩短铸件开发周期;采用静压造型线生产铸态QT700-8球墨铸铁件,其本体球化级别为1~2级,石墨大小6~7级,珠光体含量65%~70%,珠光体片间距约为0.33μm,力学性能满足要求。CAE software was used to simulate and optimize the casting process.The traditional sand casting process combined with Si,Cu and Sn composite alloying was used to produce as-cast QT700-8 ductile iron heavy truck front beam support successfully.Optical microscopy(OM)and scanning electron microscopy(SEM)were used to characterize the microstructure and fracture morphology.The Optimization of casting process based on CAE simulation results can reduce the sample debugging times and shorten the casting development cycle.QT700-8 nodular cast iron was produced by static pressure molding line.Its spheroidization grade is 1-2,graphite size is 6-7,pearlite content is 65%-70%,pearlite sheet spacing is about 0.33μm,and mechanical properties meet the requirements.

关 键 词：铸态QT700-8 显微组织 力学性能 轻量化 

分 类 号：TG244[金属学及工艺—铸造] TG255