论文部分内容阅读
近几年来,在生产实践中人们逐渐认识到孕育处理不仅起到消除渗碳体的作用,而且能使球墨细化,变得更圆整,分布得更均匀,从而获得更高的机械性能(1)。就孕育处理对球铁组织和性能的影响从理论上进行了总结。松江拖拉机厂多年来一直采用一次孕育,孕育量很大,达铁水量的 1．5%(用FeSi75)。但由于孕育衰退,经常产生同包铸件质量不一,铸件热节区出现反白口,上表面有石墨飘
In recent years, people gradually came to realize in production practice that the inoculation process not only plays the role of eliminating cementite, but also can make the black ink finer, more rounded and distributed more uniformly to obtain higher mechanical properties 1). The effect of inoculation on the microstructure and properties of ductile iron is theoretically summarized. Songjiang tractor factory has been using a gestation for many years, a large amount of gestation, up to 1.5% of the iron water (with FeSi75). However, due to the development of recession, often produce the same quality castings with castings, castings appear anti-white section hot section, graphite floating on the surface