热轧钢材免酸洗还原退火热镀锌技术进展
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摘要
介绍了热轧钢材免酸洗还原退火热镀锌的主要技术进展,从钢材氧化铁皮的精细化控制技术入手,结合氧化铁皮退火还原和热浸镀锌过程中各个控制环节的研究成果,进行了氧化铁皮的精细化控制、氧化铁皮高效还原以及基于免酸洗还原退火的热镀锌等关键技术的开发,并进行试制生产。试制结果表明,采用免酸洗工艺生产的热浸镀锌板表面质量良好,锌层延展性优良,能够满足使用要求,同时大幅降低吨钢成本,能够创造更大的经济效益。
The main technological progress of pickling-free reductive annealing hot-dip galvanization on hot-rolled steel was introduced. Combining the fine control technologies of oxide scale on steels and control process researches on the reductive annealing of oxide scale and hot dip galvanization, the key technologies of fine control technology and high-efficiency reduction technology of oxide scales as well as pickling-free reductive annealing hot-dip galvanization were developed, and then the industrial trial production was conducted. The results of industrial trial production show that the hot-dip galvanized sheet produced by pickling-free process has high surface quality and high-ductility zinc layer, which can meet the application requirements and significantly reduce the cost of steel to create greater economic benefits.
The main technological progress of pickling-free reductive annealing hot-dip galvanization on hot-rolled steel was introduced. Combining the fine control technologies of oxide scale on steels and control process researches on the reductive annealing of oxide scale and hot dip galvanization, the key technologies of fine control technology and high-efficiency reduction technology of oxide scales as well as pickling-free reductive annealing hot-dip galvanization were developed, and then the industrial trial production was conducted. The results of industrial trial production show that the hot-dip galvanized sheet produced by pickling-free process has high surface quality and high-ductility zinc layer, which can meet the application requirements and significantly reduce the cost of steel to create greater economic benefits.
引文
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[2] Ding J,Tang B,Li M,et al.Difference in the characteristics of the rust layers on carbon steel and their corrosion behavior in an acidic medium:Limiting factors for cleaner pickling [J].Journal of Cleaner Production,2017,142:2166.
[3] 曹光明,刘小江,薛军安,等.热轧带钢氧化铁皮的酸洗行为[J].钢铁研究学报,2012,24(6):36.(Cao G M,Liu X J,Xue J A,et al.Pickling mechanisms of hot-rolled steel strip[J].Journal of Iron and Steel Research,2012,24(6):36.)
[4] 朱立,孙本良.钢材酸洗技术[M].北京:化学工业出版社,2007.(Zhu L,Sun B L.Pickling Technology of Steel[M].Beijing:Chemical Industry Press,2007.)
[5] 谭宁,李俊.热轧带钢免酸洗技术进展[J].轧钢,2014,31(1):47.(Tan N,Li J.Development of acid free pickling technology for hot-rolled strip[J].Steel Rolling,2014,31(1):47.)
[6] Birks N,Meier H G,Pettit S F.Introduction to the HighTemperature Oxidation of Metals[M].London:Cambridge University Press,2006.
[7] Hayashi S,Sekimoto T,Honda K,et al.The effect of S and Mn on the high-temperature oxidation and scale spallation behavior of low-carbon steels[J].ISIJ International,2009,49(12):1938.
[8] Gong Y F,Kim H S,Cooman B C D.Internal oxidation during intercritical annealing of CMnSi TRIP steel[J].ISIJ International,2009,49(4):557.
[9] Yang Y L,Yang C H,Lin S N,et al.Effects of Si and its content on the scale formation on hot-rolled steel strips[J].Materials Chemistry and Physics,2008,112(2):566.
[10] Li H,Zhang J,Young D J.Oxidation of Fe-Si,Fe-Al and FeSi-Al alloys in CO2-H2O gas at 800℃[J].Corrosion Science,2012,54:127.
[11] Cho L,Cooman B C D.Selective oxidation of TWIP steel during continuous annealing[J].Steel Research International,2012,83(4):391.
[12] Lee D B,Sohn I R.Oxidation of Fe-18%Mn-0.6%C steels in air and a N2-CO2-O2 mixed gas atmosphere at 173-173K[J].Steel Research International,2012,83(4):398.
[13] 蒋英箴.热镀锌钢板质量缺陷浅析[J].轧钢,2006,23(1):70.(Jiang Y Z.Analysis of defects of hot-dipped galvanized sheet steel[J].Steel Rolling,2006,23(1):70.)
[14] 朱久发.汽车用合金化热镀锌板镀层缺陷及其防止措施[J].武钢技术,2009,47(2):45.(Zhu J F.Coating default on hot-dip galvannealed sheet for automobile and its preventive measures[J].WISCO Technology,2009,47(2):45.)
[15] Choi J W.Method for Manufacturing Hot Rolled Galvanized Steel Sheet at High Speed,with Pickling Skipped:Korea,6258186[P].2001-07-10.
[16] Pavlicevic M,Poloni A,Primavera A,et al.Apparatus and Process for the Dry Removal of the Scale Found on the Surface of the Metal Products:Italy,EP1579036B1[P].2008-10-29.
[17] 曹光明,孙彬,邹颖,等.板带热连轧过程氧化铁皮厚度变化的数值模拟[J].钢铁研究学报,2010,22(8):13.(Cao G M,Sun B,Zou Y,et al.Numerical simulation of oxide scales evolution during hot strip rolling[J].Journal of Iron and Steel Research,2010,22(8):13.)