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近年来,由于球墨铸铁有优异的机械性能,尤其是耐磨性,巳日益广泛用于机械制造工业的重要零件中。我厂柴油机中某些钢制零件如曲轴、凸轮轴、齿轮等,现都改用球铁制造。实践证明,它非但简化了生产过程、显著降低成本,并在严格控制工艺、贯彻检验制度的情况下,确可保证质量。以曲轴为例,原来用中碳结构钢(45铜)制的加工路线力:锻造—→正火—→热弯—→正火—→粗
In recent years, ductile iron has been increasingly used in important parts of the machine-building industry due to its excellent mechanical properties, especially wear resistance. Some steel parts of our diesel engine such as crankshaft, camshaft, gear, etc., are now used to manufacture ductile iron. Practice has proved that it not only simplifies the production process, significantly reduce costs, and in the strict control of technology, the implementation of the inspection system, can indeed ensure the quality. To the crankshaft, for example, the original carbon steel structure (45 copper) processing route force: forging - → normalizing - → hot bending - → normalizing - → thick