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.
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)
出处
《铸造》
CAS
北大核心
2023年第11期1422-1425,共4页
Foundry
关键词
重型汽车
制动鼓
失效分析
铸造工艺
heavy duty truck
brake drum
failure analysis
casting process
