通过对机车柴油机磨合期铁谱监测现状的讨论,提出磨合结束点不是“浴盆”曲线的初始最低点,而是曲线过了最高点开始下降、且磨粒细化作为判断标准的观点.经过实际应用是可行的. Based on the discussion of the status quo of ferrograph monitoring during the run-in period of locomotive diesel engine, it is proposed that the run-in end point is not the initial lowest point of the “bathtub” curve, but the curve begins to descend after the highest point and the grain refinement is taken as the judgment criterion. Application is feasible.