我们从五十年代开始进行无磁性铸铁的试验研究,五八年大批量投入生产,先后采用过电炉、冲天炉熔炼;造型工艺上既用过湿型、又用过干型和金属型;化学成分方面先用Ni—Mn系,后又改用Mn—Cu系,经过二十六年的实践,下面谈谈我们对该铸铁的认识. We started from the fifties experimental study of non-magnetic cast iron, put into production in large quantities in five or eight years, has adopted the electric furnace, cupola smelting; modeling process used both wet and dry type and metal type; chemical The composition of the first use of Ni-Mn system, and later changed to Mn-Cu system, after twenty-six years of practice, let’s talk about our understanding of the cast iron.