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汽车用钢是宝钢的主要产品系列之一,也是近年来重点研制的钢种。目前先后开发了IF钢、双相钢、车轮用钢等。 1.IF钢(Interstitial Free)又称无间隙原子钢。其特点是在超低碳钢中加入过化学当量的、能形成牢固碳氮化合物的合金元素(如铌、钛等),使之与钢中的间隙原子(碳、氮)形成稳定的化合物,从而消除了原有固溶原子间隙。这种钢具有优异的深冲性能,体现在有高的平均塑性应变率、应变硬化指数和延伸率并无时效现象(AI=0)。宝钢于1989年开始研制IF钢,1990年底首次试产成功,至今已生产了约2000tIF冷轧薄板供制造高难度冲压件使用。经一
Automobile steel is one of Baosteel’s major product lines, and it is also the key steel developed in recent years. Has developed the IF steel, dual-phase steel, steel and other wheels. 1.IF steel (Interstitial Free), also known as gapless atomic steel. It is characterized by adding stoichiometrically alloying elements (such as niobium and titanium) that form solid carbonitride compounds in the ultra-low carbon steel to form stable compounds with the interstitial atoms (carbon and nitrogen) in the steel, Thus eliminating the original solid solution atom gap. This steel has excellent deep drawing properties, manifested in high average plastic strain rate, strain hardening index and elongation without aging (AI = 0). Baosteel started to develop IF steel in 1989 and the first pilot production was successful at the end of 1990. So far, about 2,000tIF cold-rolled sheet has been produced for the manufacture of highly-difficult stamping parts. After a