等温淬火球墨铸铁轮毂的研制  

Development of Austempered Ductile Iron Wheel Hub

作　　者：贾霏雨 李欣然 李平[1] 樊沙沙 赵丕峰[1] 李朝霞 JIA Feiyu;LI Xinran;LI Ping;FAN Shasha;ZHAO Pifeng;LI Zhaoxia(School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Jiaozuo City Product Quality Inspection and Testing Center,Jiaozuo 454003,China;Jiaozuo Gude United Machinery Manufacturing Co.,Ltd.,Jiaozuo 454150,China)

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [3]焦作市产品质量检验检测中心,河南焦作454003 [4]焦作固德联合机械制造有限公司,河南焦作454150

出　　处：《铸造技术》2025年第1期81-86,共6页Foundry Technology

基　　金：河南省重点研发专项(241111231300);河南省高校基本科研业务费专项资金(NSFRF170502)。

摘　　要：针对轮毂结构较复杂、壁厚差异大及材质技术要求高的特点,需要进行合理的铸造工艺和等温淬火热处理工艺设计,以生产出优质轮毂铸件。通过确定合适的浇注位置和分型面,进行了砂芯、模样布置及浇冒系统设计。为满足轮毂本体不同部位硬度的差异性要求,将轮毂齿轮中心孔设计为不铸出孔(热处理后加工出齿轮孔),并缩短等温淬火保温时间,即900℃×2 h奥氏体化后,在硝酸盐池中进行280℃×35 min等温淬火处理。开发的轮毂铸件外观质量好,未发现明显缩孔缩松、夹杂、气孔等铸造缺陷。On the basis of the complex structure,large differences in wall thickness,and stringent material technology requirements of wheel hubs,rational casting and isothermal quenching heat treatment processes for the production of high-quality wheel hub castings are necessary.In this study,the appropriate pouring position and parting surface were determined,followed by the design of the sand core,pattern layout,and gating system.To meet the hardness requirements in different parts of the wheel hub,the gear hole in the center of the wheel hub is designed as a non-cast hole(machining into a gear hole after heat treatment),and the holding time of isothermal quenching is shortened;that is,after 900℃×2 h austenitization,it is subjected to 280℃×35 min isothermal quenching treatment in a nitrate pool.The developed wheel hub casting has good appearance quality,and no obvious casting defects such as shrinkage cavities,porosity,inclusions,and gas pores have been found.

关 键 词：球墨铸铁 轮毂 铸造工艺 等温淬火热处理 

分 类 号：TG255[金属学及工艺—铸造]