某车用平衡肘断裂原因分析  

Fracture Analysis of the Armored Vehicle Equilibrium Elbow

作　　者：陈涛[1] 李宁[2] 廖美华 何成[1] Chen Tao;Li Ning;Liao Meihua;He Cheng

机构地区：[1]杭州汽轮机股份有限公司,浙江310022 [2]北京北方车辆集团有限公司,北京100072 [3]宝钢特钢韶关有限公司,广东31300

出　　处：《大型铸锻件》2018年第4期44-45,51,共3页Heavy Casting and Forging

摘　　要：对发生断裂的某车用平衡肘进行分析,结果表明,平衡肘强度高、韧性低,缺口敏感性强,易发生断裂;平衡肘为自由锻+线切割方式制造,在一些需要圆弧过渡的地方,没有进行圆弧过渡,而是直接尖角过渡,从而在受冲击载荷时易于在尖角处萌生裂纹。通过提高平衡肘塑性和避免尖角过渡可以预防裂纹的产生。The fracture of the amlored vehicle equilibrium elbow is analyzed in this paper. The result shows that it is easy to break where the mechanical properties of the equilibrium elbow is high strength and low toughness, and the notch is sensitivity. The fomfing of equilibrium elbow is free forging and line cutting, and some places that should be smooth transition are directly sharp transition, thus resulting in the easy cracks at the sharpe corner in the impact load. The cracks can be prevented by improving the plasticity of the equilibrium elbow and avoiding the sharp comer transition.

关 键 词：平衡肘 应力集中 断裂 

分 类 号：TJ810.5[兵器科学与技术—武器系统与运用工程]