Advance on Process Technology of Extra-deep Drawing-Interstitial Atom Free (IF) Sheet Steel

Abstract

Abstract: As both C and N content in steel are no more than 30×10-6 and the steel is turned into interstitial atom free status by added micro Ti(excess Ti 0.02%~0.04%) or Ti-Nb (excess Nb ＜0.02%) alloying to compound residual C and N in steel,the interstitial atom free(IF)sheet steel has excellent deep drawing properties and non-ageing behavior, it is widely used in auto industry. The steelmaking process and chemical composition control,hot rolling,first and second cold rolling technology and annealing process for the IF steel are summarized,the progress of foundation theories for IF steel production is presented, and the secondary working embrittlement and property stability of IF steel are discussed in this paper.

Key words: Interstitial Atom Free Sheet Steel, Steelmaking, Rolling, Annealing, Advance

摘要： 无间隙原子(IF)钢的C、N含量均在30× 10^-6以下 ,并用微量Ti(过剩Ti 0.02%～ 0.04% )或Ti-Nb(过剩Nb＜0.02% )合金化以固定钢中残留C和N ,使钢成为无间隙原子状态,从而具有优异的深冲性能和非时效性,广泛应用于汽车工业。叙述了IF钢的冶炼和成分控制 ,热轧,一次和二次冷轧技术,退火工艺;介绍IF钢生产的基础理论研究进展和讨论了IF钢的二次加工脆性、性能的稳定性。

关键词: 无间隙原子钢板, 冶炼, 轧制, 退火, 进展

Zhang Peng , Wang Lingyun , Ren Zhengde. Advance on Process Technology of Extra-deep Drawing-Interstitial Atom Free (IF) Sheet Steel[J]. Special Steel, 2005, 26(2): 1-61.

张鹏, 汪凌云, 任正德. 微合金化超深冲-无间隙原子(IF)钢生产技术的进展[J]. 特殊钢, 2005, 26(2): 1-61.

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