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浇杯孕育工艺在西安柴油机厂试用成功以后,1973年3月曾在该厂的生产条件下,以295曲轴为对象,研究了不同硅铁孕育量对曲轴金相组织和常规机械性能的影响。当时我们发现在浇杯孕育工艺中,存在一个合理的孕育量问题,对于295曲轴来说,曾提出以加入0.12％孕育剂量为佳。1975年4月,在《瞬时浇杯孕育工艺浇注的球黑铸铁的机械性能》一文中,进一步提出随着铸件重量的减小,最佳孕育值有增大的倾向。但是在浇杯孕育工艺中,除了加入不同的硅铁量影响机械性能外,还存在硅铁不同的颗粒度问题,这不同的颗粒度是否也涉及到球墨铸铁的机械性能,为此我们在原生产条件下,在浇杯中加入重量相同而粒度不同的硅铁,进行了下列试验:
Caster inoculation process in Xi’an diesel engine plant after the trial of success, in March 1973 in the factory under the conditions of production, the 295 crankshaft as the object, studied the different ferrosilicon on the crankshaft microstructure and conventional mechanical properties. At that time, we found that there was a reasonable inoculation problem in the pouring cup inoculation process. For the 295 crankshaft, it was proposed to add 0.12% inoculation dosage. In April 1975, in the article titled “Mechanical Properties of Ball Black Cast Iron Pouring in Instant Pouring Cup Inoculation Process”, it is further proposed that the optimum inoculation value tends to increase as the weight of castings decreases. However, in the pouring cup inoculation process, in addition to adding a different amount of ferrosilicon affect the mechanical properties, there are different ferrosilicon particle size, the different particle size is also related to ductile iron mechanical properties, for which we in the original production Under the conditions of adding the same weight in the pouring cup and the different sizes of ferrosilicon, the following test: