TiNb钢焊接热影响区微观组织与冲击性能演变规律
Evolution of microstructure and impact property in welding HAZ of TiNb steel
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摘要: 利用热模拟技术研究了焊接热循环参数对高热输入焊接用TiNb钢焊接热影响区粗晶区的组织及冲击韧性的影响规律. 结果表明，TiNb钢焊接热循环峰值温度升高，珠光体和铁素体的含量明显减少，贝氏体的含量增多，贝氏体板条组织明显粗化，导致冲击韧性下降；高温停留时间延长，贝氏体和珠光体含量大幅降低，多边形铁素体含量增加，高温停留时间为10 s以上时，多边形铁素体组织粗化严重，冲击韧性急剧降低. 在合适的冷却时间条件下，以晶粒细小的针状铁素体组织为主，冲击韧性达到最大值. 较低的热循环峰值温度、较短的高温停留时间和合适的冷却时间，可以获得晶粒细小的铁素体组织，从而可以显著提高热影响粗晶区的冲击韧性.Abstract: The influence of welding thermal cycle parameters on the microstructure and impact property of the coarse grain zone in the HAZ of TiNb steel for large-line energy welding was studied by thermal simulation technology. The results show that the coarse-grained microstructure of the heat-affected zone of TiNb steel is mainly composed of bainite, ferrite and pearlite. When the peak temperature of thermal cycle increases, the content of pearlite and ferrite decreases, and the content of bainite increases, the slab structure is obviously roughened, resulting in the decrease of impact toughness, the prolonging of high temperature residence time, the reduction of bainite and pearlite content, and the increasing of polygonal ferrite content. The high-temperature ferrite structure is thick when the high temperature residence time is above 10 s. Then the impact toughness is drastically reduced. Under the appropriate cooling time conditions, the main microstructure is fine acicular ferrite structure, and the impact toughness reaches the maximum. With a lower thermal cycle peak temperature, a shorter high temperature residence time and a suitable cooling time, a fine grained ferrite structure can be obtained, which can significantly improve the impact toughness of the heat affected coarse grain zone.
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[1] 廖建国.大线能量焊接用厚钢板的发展[J].宽厚板, 2002, 8(2):44-48 Liao Jianguo. Development in structural steel plates for high-heat input welding[J]. Lenient Plate, 2002, 8(2):44-48 [2] 习小军,赖朝彬,吴春红,等.大线能量焊接船板钢的研究现状与发展[J].有色金属科学与工程, 2016, 7(5):56-59 Xi Xiaojun, Lai Chaobin, Wu Chunhong, et al. Research situation and development of ship plate steel by high heat input welding[J]. Nonferrous Metals Science and Engineering, 2016, 7(5):56-59 [3] Bonnevie E, Ferrière G, Ikhlef A, et al. Morphological aspects of martensite-austenite constituents in intercritical and coarse grain heat affected zones of structural steels[J]. Material Science Engineering:A, 2004, 385(1-2):352-358. [4] Zhang L, Kannengiesser T. Austenite grain growth and microstructure control in simulated heat affected zones of microalloyed HSLA steel[J]. Materials Science&Engineering A, 2014, 613:326-335. [5] 李静,王华,曲圣昱,等.焊接热循环参数对大线能量焊接用钢EH40热影响区组织和性能的影响[J].北京科技大学学报, 2012, 34(7):788-792 Li Jing, Wang Hua, Qu Shengyu, et al. Effect of welding thermal cycle parameters on the microstructure and propertise in the heat affected zone of steel EH40 for high heat input welding[J]. Journal of University of Science and Technology Beijing, 2012, 34(7):788-792 [6] 宋峰雨,李艳梅,王平,等.大热输入焊接接头组织性能研究[J].内蒙古工业大学学报, 2017, 36(1):6-9 Song Fengyu, Li Yanmei, Wang Ping, et al. Study on micostructure properties of welded joints with high heat input welding[J]. Journal of Inner Monuolia University of Technology, 2017, 36(1):6-9 [7] 徐学利,辛希贤,石凯,等.焊接热循环对X80管线钢粗晶区韧性和组织的影响[J].焊接学报, 2005, 26(8):69-72 Xu Xueli, Xin Xixian, Shi Kai. Influence of welding thermal cycle on toughness and microstructure in grain-coarsening region of X80 pipeline steel[J]. Transaction of the China Welding Institute, 2005, 26(8):69-72 [8] 胡传顺,顾玉熹.热循环峰值温度对HQ100钢热影响区组织和性能的影响[J].金属热处理, 1999, 11:11-13 Hu Chuanshun, Gu Yuxi. Effect of thermal cycle peak temperature on microstructure and properties of heat affected zone of HQ100 Steel[J]. Metal Heat Treatment, 1999, 11:11-13 [9] Zhang L P, Davis C L, Strang W M. Effect of TiN particles and microstructures on fracture toughness in simulated heat-affected-zones of a structural steel[J]. Metallurgical and Material Transactions, 1999, 30A (8):2089-2096. [10] 赵琳,张旭东,陈武柱. 800MPa级低合金钢焊接热影响区韧性的研究[J].金属学报, 2015, 41(4):392-393 Zhao Lin, Zhang Xudong, Chen Wuzhu. Toughness of heat-affected zone of 800 MPa grade low alloy steel[J]. Acta Metallurgica Sinica, 2015, 41(4):392-393 -
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