热轧工艺参数对汽车梁甩钢表面氧化铁皮结构的影响__tr.pdfVIP

轧 钢 2010年4月 ·第27卷 ·第2期 · 14 · STEEL R0LLING Ap r．2O10 Vo1．27 No．2 热轧工艺参数对汽车梁甩钢表面 氧化铁皮结构的影响 刘 勇 (攀钢集团攀枝花钢钒有限公司热轧板厂，四川 攀枝花 617067) 摘 要：以热轧铌微合金化汽车梁用钢为研究对象，分别进行了氧化动力学和热模拟实验，研究了热轧工艺参 数对热轧板表面氧化铁皮结构的影响。实验表明，汽车大梁钢在700C时氧化增重随时间呈直线变化，而高 于800℃时按抛物线规律变化。在热模拟实验中，模拟了从精轧到卷取段的氧化铁皮的生成情况。随着开轧 温度的升高，Fe。0 层的比例逐渐增大；随着终轧温度的升高，Fe。0 +FeO共存层的厚度逐渐减小；Fe。O + Fe0共存层的比例随着卷取温度的降低而增大。 关键词：热轧带钢；氧化铁皮；氧化动力学；热模拟}温度 中图分类号：TG335．55 文献标识码：A 文章编号：1003—9996(2010)02—0014一O4 Investigation on the Effects of Hot Rolling Process Parameters on the Oxide Structure of Steel Strips for Automobile Frame I IU Yong (Panzhihua Steel Vandium Co．，Ltd．，Pangang Group，Panzhihua 6 1 7067，China) Abstract：Oxidation kinetics and thermal simulation experiments were conducted tO investigate the effects of process parameters on the structure of oxide scale for hot rolled Nb micro—alloyed steel strips for automobile frame．It has been suggested that oxide gain increased linearly with time at 7oo~C while increased parabolically with time above 800℃．The evolution of oxide scale from finish rolling tO coiling was simulated．Results have shown that the proportion of Fe3 O4 in oxide scale gradually increases with the increasing of start rolling tern— perature．The thickness of Fe3 O4+FeO layer gradually decreased with increasing of finish rolling temperature． And the proportion of Fe3 O4+FeO layer increased with the decreasing of coiling temperature． Key words：hot rolled steel strip；oxide scale；oxidation kinetics；thermal simulation；temperature 1 前言 长过程受温度和时间等条件的影响，所以热轧带 纯铁的氧化铁皮一般分为三层结构，即表层