重卡制动鼓失效分析及铸造工艺研究  

Failure Analysis and Casting Technology Research of Heavy Truck Brake Drum

作　　者：穆彦青 邓晗 海丰龙 潘安霞 MU Yan-qing;DENG Han;HAI Feng-long;PAN An-xia(CRRC Qishuyan Institute Co.,Ltd.,Changzhou 213011,Jiangsu,China)

机构地区：[1]中车戚墅堰机车车辆工艺研究所有限公司,江苏常州213011

出　　处：《铸造》2023年第11期1422-1425,共4页Foundry

摘　　要：通过对重型载货汽车失效制动鼓进行裂纹失效及热-力耦合仿真分析,发现HT250材料制动鼓由于实际工况最高应力值远大于其疲劳极限经验值,而产生热疲劳裂纹开裂失效;为此,将制动鼓材料优化为RT450,同时进行了铸造工艺优化,获得了内部质量优异的铸件,蠕铁制动鼓服役寿命超过12个月。This article conducts crack failure and thermal-mechanical coupling simulation analysis on the failed brake drum of heavy-duty trucks.It is found that the HT250 material brake drum undergoes thermal fatigue crack cracking failure due to the actual highest stress value far exceeding its fatigue limit empirical value.Therefore,the brake drum material was optimized to RT450,and the casting process was optimized to obtain castings with excellent internal quality.The service life of the vermicular iron brake drum exceeded 12 months.

关 键 词：重型汽车 制动鼓 失效分析 铸造工艺 

分 类 号：TG251[金属学及工艺—铸造]