Effects of Welding Parameters on Room Temperature Mechanical Properties of T92/S30432 Dissimilar Welded Joint
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摘要: 研究了焊接工艺参数对T92/S30432异种钢焊接接头室温力学性能的影响,并获得了最佳的焊接工艺。结果表明:层间温度、焊接层数、焊丝类型和焊接接头坡口角度对接头强度的影响不大;但低层间温度和多层多道焊可以提高T92钢侧热影响区的韧性;与ERNiCr-3焊丝相比,ERNiCrMo-3焊丝填充的接头T92钢侧热影响区具有较高含量的铁素体,从而使其冲击功下降;焊接接头冲击韧性随坡口角度增大而先增大后减小,并在35°时达到最高;焊后热处理温度为760 ℃时接头具有最高的强度和韧性;T92/S30432异种钢较佳的焊接工艺是采用ERNiCr-3焊丝和较低层间温度,并严格控制焊层厚度且采用温度为760 ℃的焊后热处理。Abstract: The effects of welding parameters on room temperature mechanical properties of T92/S30432 dissimilar welded joint were investigated and the optimized welding parameters were obtained. The results reveal that welding interpass temperature,weld layers,filler metals and groove angles had little effects on strength of the joint,but low interpass temperature and more weld layers improved the impact toughness of heat-affected zone (HAZ) at T92 steel side. Compared with ERNiCr-3 filler metal,the impact energy of HAZ at T92 steel side with ERNiCrMo-3 filler metal decreased due to a higher ferrite content. In addition,the impact toughness firstly increased and then decreased with increasing the groove angels and the highest impact toughness was obtained at 35°. Moreover,the best strength and toughness were obtained at post-weld heat treatment(PWHT) temperature of 760 ℃. Hence,for the aim of obtaining the better welding parameters for T92/S30432 steels,ERNiCr-3 filler metal,a low interpass temperature,strict controlling weld layer thickness and (PWHT) treatment temperature of 760 ℃ should be employed.
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[1] YOSHIZAWA M,IGARASHI M,MORIGUCHI K,et al. Effect of precipitates on long-term creep deformation properties of P92 and P122 type advanced ferritic steels for USC power plants［J］.Materials Science and Engineering:A,2009,510/511:162-168. [2] 周荣灿,范长信.超超临界火电机组材料研究及选材分析［J］.中国电力,2005,38(8):41-47. [3] KERN T-U,STAUBLI M,SCARLIN B. The European efforts in material development for 650℃ USC power plants - COST522［J］.ISIJ International,2002,42(12):1515-1519. [4] 唐飞,董斌,赵敏.超超临界机组在我国的发展及应用［J］.电力建设,2010,31(1):80-82. [5] 朱宝田,周荣灿.进一步提高超超临界机组蒸汽参数应注意的问题［J］.中国电机工程学报,2009(增1):95-100. [6] 陈国宏,余新海,刘俊建,等.T92/TP347 H异种钢焊接接头的组织结构和力学性能［J］.压力容器,2010,27(12):1-7. [7] 史轩.超超临界电站锅炉关键材料的新进展［J］.机械工程材料,2009,33(9):1-5. [8] 焦占坡,高加强,洪杰,等.T92钢在649℃不同应力蠕变过程中Laves相的析出行为及对强度的影响［J］.机械工程材料,2010,34(10):5-8. [9] 赵林,董显平,孙锋,等.Super304H超超临界锅炉过热器管长期服役后的显微组织及力学性能［J］.机械工程材料,2013,37(7):28-32,42. [10] 姚兵印,李太江,刘福广,等.HR3C/T91异种耐热钢焊接接头的力学性能及界面蠕变失效行为研究［J］.中国电机工程学报,2011,31(11):92-98. [11] 宋有明,陈国宏,余新海,等.T92/HR3C异种钢焊接接头高温拉伸变形及断裂行为［J］.材料热处理学报,2012,33(2):72-78. [12] 杨丽颖,杨立清,解文昌,等.异种金属焊接接头微观组织的研究进展［J］.材料研究与应用,2012,6(1):1-4. [13] 章应霖,杨厚君,吕文厂,等.焊接工艺因素对电站铁素体/奥氏体异种钢接头早期失效的影响［J］.电力建设,1999(1):14-17. [14] 黄勇,石凯,刘彦明.层间温度对连续油管焊接接头组织的影响［J］.河南化工,2011,28(增2):28-30. [15] 马力深,钟约先,马庆贤,等.δ铁素体对12%Cr超超临界转子钢冲击性能的影响［J］.清华大学学报:自然科学版,2008,48(11):1887-1890. [16] 陈俊强,周世锋,白凌云,等.坡口角度对TCS不锈钢焊接接头组织及力学性能的影响［J］.焊接,2008 (6):49-52.
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