等温淬火球墨铸铁在商用车轮毂上的应用实例  

Application Examples of Austempered Ductile Iron on Commercial Wheel Hubs

作　　者：刘慧玲 侯晓华 刘文刚 LIU Huiling;HOU Xiaohua;LIU Wengang(Linzhou Hexin Casting Co.,Ltd.,Linzhou 456550,Henan China)

机构地区：[1]林州市合鑫铸业有限公司,河南林州456550

出　　处：《铸造工程》2022年第1期47-51,共5页Foundry Engineering

摘　　要：介绍了QTD800-10汽车轮毂的研制过程。主要采用高纯度生铁、低锰废钢熔炼铁液,并进行喂丝球化和多次孕育,控制化学成分(质量分数)为:C 3.70%、Si 2.60%、Mn 0.30%、P 0.025%、S≤0.02%、RE 0.015%,Mg 0.045%、Cu 0.70%。对浇注后的轮毂进行840℃、120 min奥氏体化+350℃、60 min的等温淬火,所得毂抗拉强度达845 MPa、伸长率为12.4%、硬度为260 HBW,性能指标完全达到客户要求,同时实现了产品轻量化。This article describes in detail the development process of QTD800-10 automobile wheels,mainly using high-purity pig iron,low-manganese scrap smelting,feeding yarn spheroidization and multiple inoculations.The chemical composition control(mass fraction)is as followed:C 3.70%,Si 2.60%,Mn 0.30%,P 0.025%,S≤0.02%,RE 0.015%,Mg 0.045%,Cu 0.70%.Then austenitizing the cast hub at 840℃,120 min,and isothermal quenching at 350℃,60 min.The wheels produced have a tensile strength of 845 MPa,an elongation of 12.4%,a hardness of 260 HBW.The performance fully meets customers’requirements,and achieves the goal of lightweight.

关 键 词：球墨铸铁 等温淬火 轮毂 轻量化 

分 类 号：TG163[金属学及工艺—热处理]