动态碳配分对先进高强钢组织与力学性能的影响
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摘要
目的为了使钢表现出更好的吸能特性,以具有较高的强度以及较好的塑性。方法提出了一种新型一步法成形碳配分一体化工艺,即热冲压-动态碳配分(HS-DP)工艺。所提出的HS-DP工艺采用盐浴热处理的方式进行物理模拟。采用扫描电子显微镜(SEM)、X射线衍射(XRD)和拉伸试验等方法,研究了新工艺中的冷却速率对低碳先进高强钢的微观组织和力学性能的影响。针对冷却速率对残余奥氏体含量的影响进行了分析,重点研究了残留奥氏体的体积分数和碳含量对钢伸长率的影响。结果经过HS-DP工艺处理的钢显微组织主要由初始淬火态马氏体相、最终淬火态马氏体相和残余奥氏体相共存组成。结论实验钢表现出优异性能,说明了热冲压动态碳配分工艺前景广阔。
This paper aims to make steel exhibit attractive properties as high strength and good ductility. A novel one step method for forming Q & P integration-Hot Stamping-Dynamic Partitioning(HS-DP) process was proposed. The proposed HS-DP process was simulated with salt bath heat treatment. The effect of microstructrue and mechanical properties in a low-carbon AHSS with different cooling rate of the new process was investigated with scanning electron microscopy(SEM), X-ray diffraction(XRD) and tensile test methods. The impact of retained austenite was also discussed, especially the influences of elongation caused by various retained austenite volume fraction and carbon-content. Microstructure of the steel subjected to HS-DP treatment was mainly composed of initial quenched martensite phase, final quenched martensite phase, final quenched martensite phase and retained austenite phase formed. This experiment steel illustrates the promising used in hot stamping dynamic carbon partitioning process.
This paper aims to make steel exhibit attractive properties as high strength and good ductility. A novel one step method for forming Q & P integration-Hot Stamping-Dynamic Partitioning(HS-DP) process was proposed. The proposed HS-DP process was simulated with salt bath heat treatment. The effect of microstructrue and mechanical properties in a low-carbon AHSS with different cooling rate of the new process was investigated with scanning electron microscopy(SEM), X-ray diffraction(XRD) and tensile test methods. The impact of retained austenite was also discussed, especially the influences of elongation caused by various retained austenite volume fraction and carbon-content. Microstructure of the steel subjected to HS-DP treatment was mainly composed of initial quenched martensite phase, final quenched martensite phase, final quenched martensite phase and retained austenite phase formed. This experiment steel illustrates the promising used in hot stamping dynamic carbon partitioning process.
引文
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[11]刘伟杰.一种基于动态碳配分原理的马氏体钢:中国,201210259098.3[P].2012-07-25.LIU Wei-jie.A Martensite Steel Based on Dynamic Carbon Partitioning Principle:China,201210259098.3[P].2012-07-25.
[12]FISCHER F,REISNER G,WERNER E,et al.A New View on Transformation Induced Plasticity(TRIP)[J].International Journal of Plasticity,2000,20(16):723—748.
[13]景财年,王作成,韩福涛.相变诱发塑性的影响因素研究进展[J].金属热处理,2005,30(2):26—30.JING Cai-nian,WANG Zuo-cheng,HAN Fu-tao.Research Progress of the Influencing Factors on Transformation Induced Plasticity[J].Metal Heat Treatment,2005,30(2):26—30.
[14]SANTOFIMIA M J,ZHAO L,ROUMEN P,et al.Microstructural Development During the Quenching and Partitioning Process in a Newly Designed Low-carbon Steel[J].Acta Materialia,2011,59(15):6059—6068.
[15]张永皞,姚宗勇,黄光杰,等.轧制变形铝合金微观组织与织构的EBSD研究[J].电子显微学报,2009,28(1):43—45.ZHANG Yong-hao,YAO Zong-yong,HUANG Guangjie,et al.EBSD Investigation on Microstructure and Texture in Rolling Aluminum Alloys[J].Journal of Chinese Electron Microscopy Society,2009,28(1):43—45.
[16]刘俊亮,张作贵,宓小川,等.80钢中残余奥氏体定量分析的XRD与EBSD法比较[J].电子显微学报,2010,29(1):689—692.LIU Jun-liang,ZHANG Zuo-gui,MI Xiao-chuan,et al.Comparison of XRD and EBSD for Quantitative Analysis of Remaining Austenite in X80 Pipeline Steel[J].Journal of Chinese Electron Microscopy Society,2010,29(1):689—692.
[17]SUN J,YU H.Microstructure Development and Mechanical Properties of Quenching and Partitioning(Q&P)Steel and an Incorporation of Hot-dipping Galvanization during Q&P Process[J].Materials Science&Engineering A,2013,586(1):100—107.
[2]ZYLLA I M,HOUGARDY H P.Cavitation Behaviour of a Metastable Cr-Mn-austenite[J].Steel Research,1994,65(4):132—137.
[3]傅万堂,王政,荆天辅,等.铬锰氮双相不锈钢过冷奥氏体热稳定性的研究[J].金属热处理,1997,3(11):9—10.FU Wan-tang,WANG Zheng,JING Tian-fu,et al.Thermal Stability of Undercooled Austenite in a Cr Mn N Dual-phase Stainless Steel[J].Metal Heat Treatment,1997,3(11):9—10.
[4]RAO B V N,THOMAS G.Transmission Electron Microscopy Characterization of Dislocated Lath Martensite[J].International Conference on Martensitic Transformations,l979,6(5):24—29.
[5]XU Zu-yao.Carbon Diffusion and Kinetics During the Lath Martensite Formation[J].De Physique IV,1995,5(8):351—354.
[6]XU Zu-yao,LI X M.Diffusion of Carbon During the Formation of Low-Carbon Martensite[J].Acta Metallurgica Sinica,1983,19(1):83—87.
[7]徐祖耀.材料的相变研究及其应用[J].上海交通大学学报,2001,35(3):323—330.XU Zu-yao.Studies on Phase Transformations and Their Applications in Materials Engineering[J].Journal of Shanghai Jiaotong University,2001,35(3):323—330.
[8]徐祖耀.淬火-碳分配-回火(Q-P-T)工艺浅介[J].金属热处理,2009,34(6):1—8.XU Zu-yao.A Brief Introduction to Quenching-partitioning-tempering(Q-P-T)Process[J].Metal Heat Treatment,2009,34(6):1—8.
[9]徐祖耀.将淬火-碳分配-回火(Q-P-T)及塑性成形一体化技术用于TRIP钢的创议[J].热处理,2010,25(4):1—5.XU Zu-yao.A Preliminary Suggestion of Application of a Unified Technology Combining Quenching-PartitioningTempering Process and Plastic Forming for TRIP Steels[J].Heat Treatment,2010,25(4):1—5.
[10]徐祖耀.自主创新发展超高强度钢[J].上海金属,2009,31(2):1—6.XU Zu-yao.Self-Reliance Innovation on Development of Ultra-High Strength Steel[J].Shanghai Metals,2009,31(2):1—6.
[11]刘伟杰.一种基于动态碳配分原理的马氏体钢:中国,201210259098.3[P].2012-07-25.LIU Wei-jie.A Martensite Steel Based on Dynamic Carbon Partitioning Principle:China,201210259098.3[P].2012-07-25.
[12]FISCHER F,REISNER G,WERNER E,et al.A New View on Transformation Induced Plasticity(TRIP)[J].International Journal of Plasticity,2000,20(16):723—748.
[13]景财年,王作成,韩福涛.相变诱发塑性的影响因素研究进展[J].金属热处理,2005,30(2):26—30.JING Cai-nian,WANG Zuo-cheng,HAN Fu-tao.Research Progress of the Influencing Factors on Transformation Induced Plasticity[J].Metal Heat Treatment,2005,30(2):26—30.
[14]SANTOFIMIA M J,ZHAO L,ROUMEN P,et al.Microstructural Development During the Quenching and Partitioning Process in a Newly Designed Low-carbon Steel[J].Acta Materialia,2011,59(15):6059—6068.
[15]张永皞,姚宗勇,黄光杰,等.轧制变形铝合金微观组织与织构的EBSD研究[J].电子显微学报,2009,28(1):43—45.ZHANG Yong-hao,YAO Zong-yong,HUANG Guangjie,et al.EBSD Investigation on Microstructure and Texture in Rolling Aluminum Alloys[J].Journal of Chinese Electron Microscopy Society,2009,28(1):43—45.
[16]刘俊亮,张作贵,宓小川,等.80钢中残余奥氏体定量分析的XRD与EBSD法比较[J].电子显微学报,2010,29(1):689—692.LIU Jun-liang,ZHANG Zuo-gui,MI Xiao-chuan,et al.Comparison of XRD and EBSD for Quantitative Analysis of Remaining Austenite in X80 Pipeline Steel[J].Journal of Chinese Electron Microscopy Society,2010,29(1):689—692.
[17]SUN J,YU H.Microstructure Development and Mechanical Properties of Quenching and Partitioning(Q&P)Steel and an Incorporation of Hot-dipping Galvanization during Q&P Process[J].Materials Science&Engineering A,2013,586(1):100—107.