CAJ | 학술논문

采用电子显微分析、金相组织分析和显微硬度分析等方法，对55Cr3钢轿车稳定杆疲劳试验过程中断裂的原因进行了分析。结果表明，发生断裂的稳定杆表面存在明显凹坑，导致其在疲劳试验过程中引起应力集中，是稳定杆发生早期疲劳断裂的主要原因。
채용전자현미분석、금상조직분석화현미경도분석등방법，대55Cr3강교차은정간피로시험과정중단렬적원인진행료분석。결과표명，발생단렬적은정간표면존재명현요갱，도치기재피로시험과정중인기응력집중，시은정간발생조기피로단렬적주요원인。
It is analyzed the reason for broken of 55Cr3 steel car stable bar in fatigue test, with electron mi-croscope, metallographic structure and micro hardness analysis methods.It is showed from the result that the main reason causing the primary fatigue fracture is that there is obvious steel pit on the surface of stable bar and it makes the stress concentration in test.