一、概况我厂生产的汽车发动机曲轴采用QT60-2铸态稀土镁球墨铸铁。为适应大量流水生产的需要,选用取消热处理的工艺。在大量生产的条件下,如何控制铸态曲轴的质量,如果仍然沿用一般作试块机械性能和金相组织的检验方法,检验问题必将在整个生产工艺流程中成为一个突出的薄弱环节。为此我们遵照毛主席关于“我们必须打破常规,尽量采用先进技术 I. Overview I plant the engine crankshaft production of QT60-2 cast rare earth magnesium nodular cast iron. To meet the needs of a large number of 流水生产, choose to cancel the heat treatment process. Under the conditions of mass production, how to control the quality of as-cast crankshaft, if the test methods of mechanical properties and microstructure are still used, the inspection problem will become a prominent weak link in the entire production process. To this end, we follow Chairman Mao’s statement that “we must break the routine and try our best to adopt advanced technologies.”