摘要
为了提高热轧钢板酸洗效率,以65Mn高碳钢及IF超低碳钢两种不同氧化铁皮结构的钢种为对象,研究了不同预热温度及不同酸液组分对酸洗效率的影响。结果表明:采用预热工艺,对于氧化铁皮结构相对疏松的65Mn钢热轧板显著缩短了酸洗孕育期,有效提高了酸洗效率;但对于氧化铁皮致密的IF钢热轧板效果不明显。同时,相同预热条件下,酸液组分对酸洗效率也有显著影响,当酸液浓度为101.2 g/L、Fe^(2+)浓度为86.5 g/L时,预热温度为60~120℃,两种钢种的酸洗效率都没有明显变化;但当酸液浓度为150.5 g/L、Fe^(2+)浓度为8.6 g/L时,65Mn钢热轧板仅需预热到60℃,酸洗5 s时,绝大部分氧化铁皮均已去除,相当于无预热时酸洗15 s的效果;当IF钢热轧板预热温度为120℃时,上表面酸洗10 s的效果相当于无预热酸洗30 s的效果。因此,氧化铁皮结构直接决定了钢板的酸洗特性,钢板预热工艺可在一定程度上缩短酸洗孕育期提高酸洗效率,但酸液组分及不同钢种的氧化铁皮结构对酸洗效率存在显著影响。
In order to improve the pickling efficiency of hot rolled plates,the effects of preheating treatment and acid components on the pickling efficiency of two kind of hot rolled plates with different iron oxide scale structures were studied,and the results showed that preheating significantly shortened the pickling gestation period for 65Mn steel with relatively loose iron oxide scale and effectively improving pickling efficiency,but had no obvious effect on the IF steel with dense iron oxide scale.At the same time,acid components also have a remarkable impact on pickling efficiency under the same preheating treatment,when the acidity of acid solution is 101.2 g/L,and Fe^(2+) concentration is 86.5 g/L,the pickling efficiency of the two steels has not changed significantly while preheating temperature is setting from 60℃to 120℃,but when the acidity of acid soluticn is increased to 150.5 g/L and the Fe^(2+) concentration is reduced to 8.6 g/L,65Mn steel only needs to be preheat at 60℃,most of the iron oxide scale has been removed within 5 s,which is equivalent to the effect of pickling 15 s without preheating.When the preheating temperature of IF steel reached 120℃,the effect of pickling for 10 s is equivalent to the effect of pickling for 30 s without preheating.This results show that the iron oxide scale structure directly determines the pickling characteristics of the plates,and the plate preheating technology can shorten the pickling gestation period and improve the pickling efficiency to a certain extent,but the acid components and the iron oxide scale structure of different steels have significant impact on pickling efficiency.
作者
李雯
裴新华
LI Wen;PEIXinhua(R&D Center of Meisteel,Baosteel Research Institution,Nanjing 210039,China)
出处
《轧钢》
北大核心
2025年第3期149-154,共6页
Steel Rolling
关键词
酸洗效率
预热工艺
氧化铁皮结构
酸液浓度
pickling efficiency
preheating treatment
iron oxide scale structure
acidity of acid solution
