CAJ | 학술논문

针对断裂减速机轴的微观组织、化学成分、力学性能、断口形貌进行了测试分析。结果表明，减速机轴未进行调质处理，是导致减速机轴发生疲劳断裂的主要原因。键槽底部直角过渡导致疲劳裂纹的产生，而键槽位置过于靠近轴颈台阶连接处促进了塑性失稳断裂过程。
침대단렬감속궤축적미관조직、화학성분、역학성능、단구형모진행료측시분석。결과표명，감속궤축미진행조질처리，시도치감속궤축발생피로단렬적주요원인。건조저부직각과도도치피로렬문적산생，이건조위치과우고근축경태계련접처촉진료소성실은단렬과정。
In this paper, the microstructure, chemical composition, mechanical properties and fracture morphology of fracture of reducer shaft were measured and analyzed. The reducer shaft was not prepared by quenching and tempering which directly lead to the fatigue fracture occurring. The right-angle transition at the bottom of the keyway caused the source of fatigue crack, and the keyway was too close to the shaft neck facilitating the unstable fracture process.