高强韧铝硅合金变速箱中间板压铸件热处理工艺研究  

Heat Treatment Process of Die Cast Silafont36 Alloy Gearbox Intermediate Plates

作　　者：李文巧 袁海波 马溶 陈涛 钱运亮 杨召岭 李楠 LI Wen-qiao;YUAN Hai-bo;MA Rong;CHEN Tao;QIAN Yun-liang;YANG Zhao-ling;LI Nan(Dongfeng(Shiyan)Nonferrous Casting Co.,Ltd.,Shiyan 442062,Hubei,China;Material Technology Institute of Dongfeng Commercial Vehicle Technical Center,Wuhan 430056,Hubei,China;Dongfeng Getrag Transm ission Co.,Ltd.,Wuhan 430056,Hubei,China)

机构地区：[1]东风(十堰)有色铸件有限公司,湖北十偃442062 [2]东风商用车有限公司技术中心工艺研究所,湖北武汉430056 [3]东风格特拉克汽车变速箱有限公司,湖北武汉430056

出　　处：《铸造》2019年第12期1382-1386,共5页Foundry

摘　　要：为了提高铝硅合金变速箱中间板压铸件力学性能,采用正交实验方法研究了高强韧压铸铝合金Silafont36的热处理工艺。结果表明:影响抗拉强度和屈服强度的因素依次为固溶温度、时效时间、时效温度和固溶时间;影响伸长率的因素依次为时效温度、固溶温度、固溶时间和时效时间。经实验和生产验证,变速箱中间板采用的最佳热处理工艺参数为495℃×2 h+180℃×3.5 h;同时发现,压铸工艺参数中的真空度对铸件伸长率有显著影响。In order to improve the mechanical properties of die-cast Silafont36 alloy gearbox intermediate plates, the heat treatment process of high strength and toughness Al-Si alloy Silafont36 was studied by orthogonal experiment. The results show that the factors affecting the tensile strength and yield strength of die-cast Al-Si alloy Silafont36 are solution temperature, aging time, aging temperature and solution time, and the factors affecting elongation are aging temperature, solution temperature, solution time and aging time. Experiments and production verify that the optimum heat treatment process for gearbox intermediate plates are 495 ℃ ×2 h+180 ℃ ×3.5 h. Meanwhile, the vacuum degree in the die casting process was found to have a significant effect on the elongation..

关 键 词：高强韧 铝硅合金 压铸件 热处理工艺 

分 类 号：TG166.3[金属学及工艺—热处理]