晶界显微组织特征对无间隙原子钢韧脆转变温度的影响
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摘要
通过改变退火时间改变了无间隙原子钢(IF钢)的晶界显微组织特征,借助电子背散射衍射仪(EBSD)和俄歇电子能谱仪(AES)分析了含磷无间隙原子钢的晶界特征与晶界处P的偏聚量,对比了冲击试验获得的韧脆转变温度(DBTT)。结果表明:IF钢DBTT的主要影响因素是P的晶界偏聚、晶界特征分布。增加IF钢中小角度晶界和重位点阵(CSL)晶界的比例,控制大角度晶界的比例能有效降低P在晶界的偏聚并改善钢的脆性。
The grain boundary microstructure characteristics of interstitial free(IF) steel was changed by changing the annealing time. Phosphorus-bearing IF steel grain boundary characteristics and segregation of P at grain boundaries were analyzed by using electron backscatter diffraction(EBSD) and Auger electron spectroscopy(AES). The ductile-to-brittle transition temperature(DBTT) obtained by impact test was compared.The results show that the main influencing factors of IF steel DBTT are the grain boundary segregation of P and the distribution of grain boundary characteristics. Increasing the proportion of small and medium angle grain boundaries and coincidence site lattice(CSL) grain boundaries in IF steel, and controlling the ratio of large angle grain boundaries can effectively reduce the segregation of P in grain boundaries and improve the brittleness of steel.
The grain boundary microstructure characteristics of interstitial free(IF) steel was changed by changing the annealing time. Phosphorus-bearing IF steel grain boundary characteristics and segregation of P at grain boundaries were analyzed by using electron backscatter diffraction(EBSD) and Auger electron spectroscopy(AES). The ductile-to-brittle transition temperature(DBTT) obtained by impact test was compared.The results show that the main influencing factors of IF steel DBTT are the grain boundary segregation of P and the distribution of grain boundary characteristics. Increasing the proportion of small and medium angle grain boundaries and coincidence site lattice(CSL) grain boundaries in IF steel, and controlling the ratio of large angle grain boundaries can effectively reduce the segregation of P in grain boundaries and improve the brittleness of steel.
引文
[1]王瑞珍,罗海文,董瀚.汽车用高强度钢板的最新研究进展[J].中国冶金,2006,16(9):1-9.
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[3]Lin Y L.Problems and countermeasures of refractory application in IF steel technology[J].中国耐火材料(英文版),2011,20(4):6-14.
[4]王绚,唐雪萍,杨接明,等.钢中主要杂质元素的特性及影响[J].特钢技术,2011(1):13-15.
[5]李莉,金国,郑卫,等.12Cr2Mo1和12Cr1Mo V钢的回火脆性研究[J].机械工程师,2003(5):31-33.
[6]丁富连,魏毅静,陈卓人,等.汽车钢板二次加工脆化试验及其在宝钢的应用[J].宝钢技术,2006(2):61-65.
[7]沈东东,袁泽喜.2.25Cr1Mo钢韧脆转变温度影响因素分析[J].武汉科技大学学报,2011,34(6):410-413.
[8]曹圣泉,张津徐,吴建生,等.IF钢再结晶晶粒尺寸、显微织构和晶界特征分布的EBSD研究[J].理化检验(物理分册),2004,40(4):163-167.
[9]曹圣泉,张津徐,吴建生,等.晶界结构对IF钢二次加工脆性的影响[J].钢铁研究学报,2005,17(1):51-54.
[10]Xu T D,Song S H.A kinetic model of non-equilibrium grain boundary segregation[J].Acta Metallurgica,1989,37(9):2499-2506.
[11]Lehockey E M,Palumbo G,Lin P.Grain boundary structure effects on cold work embrittlement of microalloyed steels[J].Scripta Materialia,1998,39(3):353-358.
[2]李激光,张金栋,黄海亮,等.高强汽车用钢的研究现状及发展趋势[J].材料导报:纳米与新材料专辑,2012,26(1):397-401.
[3]Lin Y L.Problems and countermeasures of refractory application in IF steel technology[J].中国耐火材料(英文版),2011,20(4):6-14.
[4]王绚,唐雪萍,杨接明,等.钢中主要杂质元素的特性及影响[J].特钢技术,2011(1):13-15.
[5]李莉,金国,郑卫,等.12Cr2Mo1和12Cr1Mo V钢的回火脆性研究[J].机械工程师,2003(5):31-33.
[6]丁富连,魏毅静,陈卓人,等.汽车钢板二次加工脆化试验及其在宝钢的应用[J].宝钢技术,2006(2):61-65.
[7]沈东东,袁泽喜.2.25Cr1Mo钢韧脆转变温度影响因素分析[J].武汉科技大学学报,2011,34(6):410-413.
[8]曹圣泉,张津徐,吴建生,等.IF钢再结晶晶粒尺寸、显微织构和晶界特征分布的EBSD研究[J].理化检验(物理分册),2004,40(4):163-167.
[9]曹圣泉,张津徐,吴建生,等.晶界结构对IF钢二次加工脆性的影响[J].钢铁研究学报,2005,17(1):51-54.
[10]Xu T D,Song S H.A kinetic model of non-equilibrium grain boundary segregation[J].Acta Metallurgica,1989,37(9):2499-2506.
[11]Lehockey E M,Palumbo G,Lin P.Grain boundary structure effects on cold work embrittlement of microalloyed steels[J].Scripta Materialia,1998,39(3):353-358.