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资本主义国家宣称,他们在1948—1949年分别用(?)和镁处理得到了球墨铸铁,认为是了不起的发明,其实早在1941年,苏联即已指出用镁处理可增进铸铁的性能。中国科学院冶金陶瓷研究所(即前工学实验馆)于1950年夏着手进行球墨铸铁的研究。同年10月试制成功。1951年全国很多工厂试制球墨铸铁成功,并应用到生产上。由于吸取苏联的先进经验,我国对球墨铸铁的熔制技术及性能上都已超过了资本主义国家的水平。
The capitalist countries claimed that they had obtained ductile iron by (?) And magnesium treatment respectively from 1948 to 1949 as a remarkable invention. In fact, as early as 1941, the Soviet Union pointed out that magnesium treatment can enhance the performance of cast iron. Metallurgy and Ceramics Institute of Chinese Academy of Sciences (formerly Engineering Laboratory) in the summer of 1950 to proceed with the study of ductile iron. The same year in October trial success. In 1951 a lot of factories trial production ductile iron success, and applied to the production. Drawing on the advanced experience of the Soviet Union, China’s melting technology and performance of ductile iron have surpassed the level of capitalist countries.