汽车制动鼓失效形式与铸造工艺的优化  

Failure Mode and Casting Process Optimization of Automobile Brake Drum

作　　者：于翔海 陶磊 于伟莉 张象中 李建 秦鹏鹏 江豪 YU Xiang hai;TAO Lei;YU Weili;ZHANG Xiangzhong;LI Jian;QIN Pengpeng;JIANG Hao(Zhumadian CIMC Huajun Casting Co.,Ltd.,Zhumadian 463000,China;Gree Electric Appliances,Inc.of Guangdong,Zhuhai 519000,China)

机构地区：[1]驻马店中集华骏铸造有限公司,河南驻马店463000 [2]珠海格力电器股份有限公司,广东珠海519000

出　　处：《铸造技术》2021年第6期499-501,共3页Foundry Technology

摘　　要：载重汽车制动鼓的制动面出现纵向裂纹比龟裂纹危害性大。制动面柱状晶短、中心部位等轴晶多而细,能有效避免纵向裂纹的产生。底注铸造工艺使制动鼓上部制动面位置产生成大量的细等轴晶,抑制了下部柱状晶的生长。Longitudinal crack on brake surface of truck brake drum is more harmful than network cracks.The short columnar crystal on the braking surface and the fine equiaxed crystal in the center can effectively avoid the generation of longitudinal cracks.The bottom pouring casting process produces a large number of fine equiaxed grains at the upper brake surface of the brake drum,which inhibits the growth of columnar grains at the lower part.

关 键 词：皲裂 等轴晶 柱状晶 底注 抗热疲劳 

分 类 号：TG143[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]