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本文介绍了ＩＦ钢的发展状况及国际上关于ＩＦ钢研究所取得的最新成果，主要包括：①当前ＩＦ钢物理冶金学研究的热点，如探求深冲极限、废钢的回收利用以及二相粒子等；②ＩＦ钢新品种开发的进展；③ＩＦ钢生产应用中出现的新问题
This paper introduces the development status of IF steel and the latest international achievements on the research of IF steel. The main contents are as follows: 1) The current hot topics in physical metallurgy research of IF steel, such as deep drawing limit, scrap recycling and two-phase particles ; ② the development of new varieties of steel IF; ③ steel production and application of new problems