發(fā)布時(shí)間：2019-02-17 17:25

【摘要】：首鋼現(xiàn)行工藝下IF鋼熱卷鐵皮厚度達(dá)到10μm以上,邊部鐵皮略薄,中部鐵皮較厚,隨著卷取溫度的升高,鐵皮厚度增加且對(duì)應(yīng)酸洗時(shí)間延長(zhǎng);不同卷取溫度下的熱卷酸洗后均發(fā)現(xiàn)小麻坑缺陷。本文利用差熱分析手段研究了IF鋼的高溫氧化機(jī)理,發(fā)現(xiàn)IF鋼抗氧化性低,隨溫度升高鐵皮增厚明顯,精軋區(qū)間以FeO鐵皮結(jié)構(gòu)為主,在1 150℃左右發(fā)生明顯的內(nèi)氧化,界面形成大顆粒氧化質(zhì)點(diǎn)。綜合分析得出:IF鋼帶鋼連退后麻點(diǎn)缺陷產(chǎn)生的主要機(jī)理為熱卷的鐵皮較厚,熱軋過程壓入鋼板表面所致。為此,提出了控制措施,即降低熱軋過程溫度,改變層冷模式,加大精軋用水量,提高精軋軋制速度,降低冷軋酸洗速度等,有效減少了麻點(diǎn)缺陷的發(fā)生概率。
[Abstract]:In Shougang, the thickness of hot coiled iron sheet of IF steel is more than 10 渭 m, the edge of iron sheet is slightly thin, and the middle part of iron sheet is thicker. With the increase of coiling temperature, the thickness of IF steel increases and the corresponding pickling time is prolonged. After pickling hot coils at different coiling temperatures, the defects of the pits were found. In this paper, the oxidation mechanism of IF steel at high temperature was studied by means of differential thermal analysis. It was found that the oxidation resistance of IF steel was low, the thickness of iron sheet increased obviously with the increase of temperature, and the finish rolling zone was dominated by the structure of FeO sheet, and obvious internal oxidation occurred at about 1 150 鈩，

本文編號(hào)：2425409