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介绍用呋喃树脂自硬砂型生产大型球铁曲轴时遇到的质量问题以及工艺对策。 根据试验室试验数 据和长期生产统计数据，对自硬砂型和粘土砂干砂型的性能，用两种铸型生产的大型曲轴的金相组织，材质 密度和力学性能进行了对比分析，证明自硬砂型铸造的曲轴，内部质量与干砂型铸造的曲轴没有差别，表面 质量和尺寸精度明显优于干砂型曲轴，综合废品率亦比干砂型曲轴明显降低。
Describes the quality problems encountered in the production of large ductile iron crankshafts with furan resin and hard coals, as well as process measures. According to laboratory test data and long-term production statistics, the performance of self-hardening sand and clay sand dry sand was compared with the metallographic structure, material density and mechanical properties of the large crankshaft produced by the two castings, Sand casting crankshaft, the internal quality and dry sand cast crankshaft no difference, the surface quality and dimensional accuracy was significantly better than the dry sand crankshaft, the comprehensive rejection rate is also significantly lower than the dry sand crankshaft.