回顾了奥氏体-贝氏体球墨铸铁于1960年代后期在我国诞生40年来,在理论研究、工艺技术和生产应用方面的进展。详细分析了球铁和钢中上、下贝氏体本质的差别及奥-贝球铁强韧化机制,介绍了对铸铁中石墨与金属基体G-M界面强韧化的新观点和笔者等研制奥-贝球铁锤头的经验。 Recalling the austenitic - bainitic ductile iron in the late 1960s in our country 40 years ago, in theoretical research, process technology and production and application progress. The differences between the upper and lower bainite in ductile iron and steel and the strengthening and toughening mechanism of austenite-ductile iron are analyzed in detail. New ideas of strengthening and toughening GM interface between graphite and metal matrix in cast iron are introduced. The experience of the ball iron hammer.