近来从节省资源和能源的观点出发,对机器零件采取了减轻重量的措施,即使对铸铁材料也如此,因此对薄壁高强度铸铁进行了开发研究。但就铸铁特性来说,如果壁非常薄,冷却速度将会变大,凝固移向介稳定系而形成白口组织,使机械性 Recently, from the point of view of saving resources and energy, weight reduction measures have been taken on machine parts, and even for cast iron materials, development of thin-walled high-strength cast iron has been carried out. However, as far as cast iron properties are concerned, if the walls are very thin, the cooling rate will increase and the solidification will shift toward the metastable system and a white-stained structure will be formed, making the mechanical