Microstructure and Properties of Ti Microalloyed Automobile Frame Steel 510L

doi:10.12068/j.issn.1005-3026.2018.03.008

Abstract

Abstract: The effects of cooling process parameters on microstructure and mechanical properties of Ti microalloyed automobile frame steel 510L were studied by laminar cooling， coiling process simulation experiment and laboratory hot rolling experiment. Industrial trial production was made at the production site. The results showed that great cooling rate is advantageous to the precipitation of dispersed and fine TiC particles. The effects of cooling rate and final cooling temperature on the strength of the experimental steel include the joint action of precipitation strengthening， fine grain strengthening and phase transformation strengthening. N content significantly influences the precipitation strengthening effect of Ti. The N content in the steel should be strictly controlled during smelting， otherwise it will have a great influence on the properties of the steel plate. Mass stable production of Ti microalloyed automobile frame steel 510L with low cost has been realized.

Key words: Ti microalloyed, 510L, thermo-mechanical control process(TMCP), microstructure evolution, mechanical properties

CLC Number:

TG142.1

CHEN Qi-yuan， ZHOU Xiao-guang， LIU Zhen-yu， WU Si-wei. Microstructure and Properties of Ti Microalloyed Automobile Frame Steel 510L[J]. Journal of Northeastern University Natural Science, 2018, 39(3): 339-344.

References

[1]王欣，康永林，于浩，等.FTSR工艺生产低C-Mn钢510L汽车大梁板的组织性能分析［J］.汽车工艺与材料，2006(2):6-8.(Wang Xin，Kang Yong-lin，Yu Hao，et al.Analysis on the microstructure and mechanical properties of low C-Mn 510L beam plate produced by FTSR technology［J］.Automobile Technology & Material，2006(2):6-8.)
[2]杨澄.汽车大梁板WL510钢的性能控制［J］.金属热处理，2011，36(10):11-14.(Yang Cheng.Properties controlling of automobile beam steel WL510［J］.Heat Treatment of Metals，2011，36(10):11-14.)
[3]Medina S F，Chapa M，Valles P，et al.Influence of Ti and N contents on austenite grain control and precipitate size in structural steels［J］.ISIJ International，1996，39(9):930-936.
[4]张继魁，辛莹，张曼曼，等.汽车大梁用低合金高强度钢板的性能与发展［J］.汽车工艺与材料，2004(6):42-46.(Zhan Ji-kui，Xin Ying，Zhang Man-man，et al.Property and development of high strength low alloy hot rolled steel sheet for truck frame use［J］.Automobile Technology & Material，2004(6):42-46.)
[5]Xie K Y，Zheng T，Cairney J M，et al.Strengthening from Nb-rich clusters in a Nb-microalloyed steel［J］.Scripta Materialia，2012，66(9):710-713.
[6]Kamibayashi K，Tanabe Y，Takemoto Y，et al.Influence of Ti and Nb on the strength-ductility-hole expansion ratio balance of hot-rolled low-carbon high-strength steel sheets［J］.ISIJ International，2012，52(1):151-157.
[7]Soto R，Saikaly W，Bano X，et al.Statistical and theoretical analysis of precipitates in dual-phase steels microalloyed with titanium and their effect on mechanical properties［J］.Acta Materialia，1999，47(12):3475-3481.
[8]Chsapa M，Medina S F，Lopez V，et al.Influence of Al and Nb on optimum Ti/N ratio in controlling austenite grain growth at reheating temperatures［J］.ISIJ International，2002，42(11):1288-1296.
[9]Shi Z R，Chai X Y，Chai F，et al.The mechanism of intragranular ferrite formed on Ti-rich(Ti，V)(C，N)precipitates in the coarse heat affected zone of a V-N-Ti microalloyed steel［J］.Materials Letters，2016，175(14):266-270.
[10]Xu Y，Zhang W N，Sun M X，et al.The blocking effects of interphase precipitation on dislocations’ movement in Nb/Ti micro-alloyed steels［J］.Materials Letters，2015，139(15):177-181.
[11]Mao X P，Huo X D，Sun X J，et al.Strengthening mechanisms of a new 700MPa hot rolled Ti-microalloyed steel produced by compact strip production［J］.Journal of Materials Processing Technology，2010，210(12):1660-1666.
[12]Eghbali B.Microstructural development in a low carbon Ti-microalloyed steel during deformation within the ferrite region［J］.Materials Science and Engineering A，2008，480(1):84-88.(上接第328页)
[4]Jiang Q，Wang G，Jin S，et al.Predicting human microRNA-disease associations based on support vector machine［J］.International Journal of Data Mining and Bioinformatics，2013，8(3):282-293.
[5]Zou Q，Li J J，Hong Q Q，et al.Prediction of MicroRNA-disease associations based on social network analysis methods［J］.BioMed Research International，2015，2015:810514.doi:10.1155/2015/810514.
[6]Chen X，Yan G Y.Semi-supervised learning for potential human microRNA-disease associations inference［J］.Scientific Report，2014，4:5501.doi:10.1038/srep05501.
[7]Chen X，Yan C G，Zhang X T，et al.RBMMMDA:predicting multiple types of disease-microRNA associations［J］.Scientific Report，2015，5:13877.doi:10.1038/srep13877.
[8]Chen H L，Zhang Z P.Similarity-based methods for potential human microRNA-disease association prediction ［J］.BMC Medical Genomics，2013，6(12):1-9.
[9]Sun D D，Li A，Feng H Q，et al.NTSMDA:prediction of miRNA-disease associations by integrating network topological similarity ［J］.Molecular BioSystems，2016，12(7):2224-2232.
[10]Navlakha S，Kingsford C.The power of protein interaction networks for associating genes with diseases［J］.Bioinformatics，2010，26(8):1057-1063.
[11]孟宪伟.MicroRNA与人类疾病关联的预测方法研究与实现［D］.哈尔滨:哈尔滨工业大学，2012.(Meng Xian-wei.Research and implementation of predicting human disease-related microRNAs［D］.Harbin:Harbin Institute of Technology，2012.)
[12]Chen X，Liu M X，Yan G Y.RWRMDA:predicting novel human microRNA-disease associations［J］.Molecular BioSystmes，2012，8(10):2792-2798.
[13]Xuan P，Han K，Guo Y D，et al.Prediction of potential disease-associated microRNAs based on random walk［J］.Bioinformatics，2015，31(11):1805-1815.
[14]van Driel M A，Bruggeman J，Vriend G，et al.A text-mining analysis of the human phenome［J］.European Journal of Human Genetics，2006，14(5):535-542.
[15]Khler S，Schulz H，Krawitz P，et al.Clinical diagnostics in human genetics with semantic similarity searches in ontologies［J］.The American Journal of Human Genetics，2009，85(4):457-464.
[16]Li J H，Lin X Y，Teng Y Y，et al.A comprehensive evaluation of disease phenotype networks for gene prioritization［J］.PLOS One，2016，11(7):e0159457.doi:10.1371/journal.pone.0159457.
[17]Wang D，Wang J，Lu M，et al.Inferring the human microRNA functional similarity and functional network based on microRNA-associated diseases［J］.Bioinformatics，2010，26(13):1644-1650.
[18]Vanunu O，Magger O，Ruppin E，et al.Associating genes and protein complexes with disease via network propagation［J］.PLOS Computational Biology，2010，6(1):e1000641.