花键轴断裂失效分析.PDF

57 Fracture Analysis of Spline Shaft 1 1 2 1 , , , ( 1 , 100095; 2 , 333403) 1 1 2 1 HU hunyan , LIU Delin , WAN Fang ,T AO hunhu ( 1 Beijing Institute of A eronautical Materials, Beijing 100095, hina; 2 Jingdezhen eramic Institute, Jingdezhen 333403, Jiangxi, hina) : : ; , , : ; ; : TG14233 : A : 2009 Abstract: T he fracture reason of the spline shaft was analyzed by fracture observation, chemical com position analysis, metallurgical structure observation, hardness test and tensile test. T he result shows that the fracture mode is fatigue fracture. T he fracture is mainly caused by the lower hardness and strength which resulted from the Widmanstatten structure existing in the structure of the spline shaft. Key words: spline shaft; fatigue fracture; Widmanstatten structure 42 rMo , 5 , , , , [ 1] [ 2] 42 rMo , :+ , , 1 11 , 12 , , , , , # 6 , 1 , , ; 58 / 2009 5 12 JSM5600LV # 1 3, , , , , 4 # # # 52 - 6 1 , , , 6, , 6 Fig6 Process trace of fatigue