镧对高强IF钢退火过程中组织及力学性能的影响
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摘要
在实验室利用箱式炉对冷轧高强IF钢薄板进行罩式退火试验,使用金相显微镜和X射线衍射技术,研究罩式退火过程中稀土镧对再结晶组织和织构转变的影响。并结合拉伸试验研究镧在不同保温时间下对力学性能的影响。结果表明:稀土镧在罩式退火中强烈推迟再结晶,再结晶过程晶粒细化;并且对于γ类型织构的均匀性起到阻碍作用;稀土镧对抗拉强度的增大有促进作用,但使得伸长率减小。
Batch annealing test of cold-rolled high strength IF steel sheet was carried out by box type furnace in laboratory,the effect of lanthanum element on recrystallization microstructure and texture transformation during the batch annealing process was studied by means of metallographic microscope and X ray diffraction.The influence of lanthanum element on mechanical properties under different holding time was studied by tensile test.The results show that during the batch annealing,lanthanum element delays the recrystallization refines the recrystallized grains; It also hinders the strengthening of γ type texture.Rare earth lanthanum element promotes the tensile strength but reduces the elongation.
Batch annealing test of cold-rolled high strength IF steel sheet was carried out by box type furnace in laboratory,the effect of lanthanum element on recrystallization microstructure and texture transformation during the batch annealing process was studied by means of metallographic microscope and X ray diffraction.The influence of lanthanum element on mechanical properties under different holding time was studied by tensile test.The results show that during the batch annealing,lanthanum element delays the recrystallization refines the recrystallized grains; It also hinders the strengthening of γ type texture.Rare earth lanthanum element promotes the tensile strength but reduces the elongation.
引文
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[3]郝柳,任慧平,金自力,等.稀土La和退火工艺对高强IF钢组织的影响[J].金属热处理,2017,42(11):35-38.Hao Liu,Ren Huiping,Jin Zili,et al.Effect of rare earth La and annealing process on microstructure of high strength IF steel[J].Heat Treatment of Metals,2017,42(11):35-38.
[4]瞿伟,金自力,崔瑞婷,等.基于CSP工艺下稀土元素对低碳钢冷轧板再结晶的影响[J].材料热处理报,2013,34(S1):56-60.Qu Wei,Jin Zili,Cui Ruiting,et al.Effect of rare earch elements on recrystallization nucleation and growth of the low carbon steel coldrolledplates based on the CSP process[J].Transactions of Materials and Heat Treatment,2013,34(S1):56-60.
[5]王朝毅,金自力,郝柳,等.镧对高强IF钢连续退火过程中再结晶行为的影响[J].金属热处理,2017,42(7):14-17.Wang Chaoyi,Jin Zili,Hao Liu,et al.Effect of Lanthanum on recrystallization behavior of high strength IF steel during continuous annealin[J].Heat Treatment of Metals,2017,42(7):14-17.
[6]何建锋.汽车用薄板的连续退火技术[J].钢铁研究,2004,32(4):39-42.He Jianfeng.Continuous annealing technology for automobile sheet[J].Research on Iron and Steel,2004,32(4):39-42.
[7]Khatirkar Rajesh K,Kumar Sunil.Comparison of recrystallization textures in interstitial free and interstitial free high strength steels[J].Materials Chemistry and Physics,2011,127:128-136.
[8]Katsumata A,Todoroki H.Effects of rare earth metal on inclusion composition in molten stainless steel[J].CAMP-ISIJ,2002,14:51-57.
[9]冯岩青,王福明.IF钢罩式退火过程中再结晶组织与织构的演变[J].特殊钢,2012,33(6):39-42.Feng Yanqing,Wang Fuming.A study on evolution of recrystallization structure and textures in an IF steel during batch annealing process[J].Special Steel,2012,33(6):39-42.
[10]胡赓祥,蔡珣,戎咏华,等.材料科学基础[M].上海:上海交通大学出版社,2001.
[11]Tuttle R.Effect of rare earth additions on grain refinement of plain carbon steels[J].International Journal of Metalcasting,2012,6(2):51-65.
[12]张洁岑,邸洪双,蒋光炜,等.退火温度对含磷高强IF钢Fe Ti P析出行为的影响[J].东北大学学报(自然科学版),2014,35(10):1404-1407.Zheng Jieqin,Di Hongshuang,Jiang Guangwei,et al.Effect of annealing temperature on Fe Ti P-type precipitate in P-added IF high strength steel[J].Journal of Northeastern University(Natural Science),2014,35(10):1404-1407.