稀土镁铜钼合金球铁曲轴,我厂自72年试制生产以来,应用车型较多生产批量也较大,为国家节省了大量的合金钢材。用户普遍反映比锻钢曲轴质量好。近几年来,受“四人帮”的干扰破坏,导致产品质量明显下降。78年间十多个用户反应,在使用我厂的Q6135柴油机发电时,发生曲轴断裂事故(也有少量是在汽车运行时断裂的)。经过断口分析,断裂事故均属由内在缺陷引起,缺陷的性质为缩松。这一新的情况引起了厂党委的重视,发动有关部门 Rare earth Mg-Cu-Mo alloy ductile iron crankshaft, I plant since trial production in 72, the application of more production models are also larger, for the country to save a lot of alloy steel. Users generally reflect better quality than forged steel crankshafts. In recent years, the “gang of four” interfered with the destruction, leading to a marked drop in product quality. More than a dozen users responded during the 78 years and crankshaft rupture occurred while using the Q6135 diesel engine in our plant (a small amount was broken while the car was running). After fracture analysis, fracture accidents are caused by inherent defects, the nature of defects as shrinkage. This new situation has aroused the attention of the factory party committee, mobilize the relevant departments