高强IF钢基板中心偏析及改善措施研究
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摘要
针对高强IF钢T210P1基板硫化物偏析与组织偏析的问题进行了研究,结果表明MnS先于TiS析出,S质量分数由0.012%降低至0.008%以下时,可有效改善硫化物中心偏析现象;加热温度为1 250℃、加热时间为180min时,较加热温度为1 150℃、加热时间为120min有助于改善P元素在厚度中心富集导致的组织偏析现象。
In view of sulfide segregation and microstructure segregation in high strength IF steel T210 P1 hot strips for cold rolling,the causes were studied.The results show that MnS precipitated before TiS,and central segregation could be relieved when the mass content of S was reduced from 0.012%to below 0.008%.Meanwhile,the microstructure segregation caused by P precipitation was obviously improved through higher reheating temperature and longer time at 1 250℃and 180 min than at 1 150℃and 120 min.
In view of sulfide segregation and microstructure segregation in high strength IF steel T210 P1 hot strips for cold rolling,the causes were studied.The results show that MnS precipitated before TiS,and central segregation could be relieved when the mass content of S was reduced from 0.012%to below 0.008%.Meanwhile,the microstructure segregation caused by P precipitation was obviously improved through higher reheating temperature and longer time at 1 250℃and 180 min than at 1 150℃and 120 min.
引文
[1]胡燕慧,陈凌峰,张浩,等.硼对Ti-IF钢力学性能及再结晶过程的影响[J].钢铁,2017,52(4):72.
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[4]邱木生,黄学启,李亚东,等.热浸镀锌Ti-IF和Nb+Ti-IF钢组织和织构研究[J].轧钢,2017,34(3):29.
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[6]胡晓军,方克明,周国治,等.硫在Ti-IF钢中的作用[J].北京科技大学学报,2001,23(3):275.
[7]郭亚东,肖丽俊,仇圣桃,等.TSCR工艺生产SPHC板过程硼微合金化对AlN、MnS析出的影响[J].钢铁研究学报,2007,19(7):24.
[8]郭宏海,宋波,毛璟红,等.凝固组织对耐候钢中磷偏析的影响[J].材料与冶金学报,2008,7(1):39.
[9]Koichi Hirata,Osamu Umezawa,Kotobu Nagai.Microstructureof cast strip in 0.1mass%C steels containing phosphorus[J].Mater.Trans.,2002,43(3):305.
[10]Osalnu Umezawa,Koichi Hirata,Kotobu NagaL.Influence of phosphorus micro-segregation on ferrite structure in caststrips of 0.1mass%C steel[J].Mater.Sci.Techn.,2003,44(7):1266.
[2]赵成林,唐复平,朱晓雷,等.IF钢连铸坯表层夹杂分布特征的试验[J].钢铁,2017,52(12):42.
[3]吕家舜,乔磊,李锋,等.IF钢铁素体区轧制对带钢最终性能的影响[J].轧钢,2016,33(1):10.
[4]邱木生,黄学启,李亚东,等.热浸镀锌Ti-IF和Nb+Ti-IF钢组织和织构研究[J].轧钢,2017,34(3):29.
[5]Tither G,Garcia C I,Hua M,et al.Precipitation behavior and solute effects in interstitial-free steels[C]//Sakuma Teds.International Forum for Physical Metallurgy of IF Steels.Tokyo:The Iron and Steel Institute of Japan,1994:293.
[6]胡晓军,方克明,周国治,等.硫在Ti-IF钢中的作用[J].北京科技大学学报,2001,23(3):275.
[7]郭亚东,肖丽俊,仇圣桃,等.TSCR工艺生产SPHC板过程硼微合金化对AlN、MnS析出的影响[J].钢铁研究学报,2007,19(7):24.
[8]郭宏海,宋波,毛璟红,等.凝固组织对耐候钢中磷偏析的影响[J].材料与冶金学报,2008,7(1):39.
[9]Koichi Hirata,Osamu Umezawa,Kotobu Nagai.Microstructureof cast strip in 0.1mass%C steels containing phosphorus[J].Mater.Trans.,2002,43(3):305.
[10]Osalnu Umezawa,Koichi Hirata,Kotobu NagaL.Influence of phosphorus micro-segregation on ferrite structure in caststrips of 0.1mass%C steel[J].Mater.Sci.Techn.,2003,44(7):1266.