借助激光-MIG复合焊技术，采用Invar M93焊丝对厚度为19.05mm的Invar合金板材进行多层对接焊实验。分析了工艺参数对焊缝熔深、熔宽及深宽比等宏观形貌参数的影响，并研究 Invar 合金复合焊接头不同区域的显微组织特点及形成原因。结果表明：从打底层到盖面层焊缝的平均深宽比由2.6减小到0.86，热影响区宽度明显增加，焊缝形貌由钉头状转变为高脚杯状。焊缝中心区域形成纵向分布的狭长奥氏体柱状树枝晶，两侧为斜向生长的奥氏体胞状树枝晶。从打底层到盖面层，焊缝中不同区域的晶粒度均逐渐增大。另外，相邻焊缝边界亦存在热影响区，出现联生结晶现象。
Invar alloy plates with thickness of 19.05mm were welded with Invar M93 filler wire bylaser-MIG hybrid welding. The effects of welding parametersonweld appearance including beam penetration, weld witch and depth-to-witch ratio were analyzed. The features and the forming mechanism of the microstructure on different regions of the weld were investigated.The results show thatthe weld depth-to-witch ratio gradually decreases from 2.6 to 0.86 in averageand the witch of HAZ obviously increasesfrom back weld to cover weld, leading to the weld appearance changing from nail-head shape to goblet shape. NarrowAustenticcolumnar dendritecrystalsin longitudinal direction and oblique diagonal cellular dendrite crystal are formed in weld center and off-centered area, respectively. The grain size in different regions of the weldincreaseslayer-by-layer. In addition, HAZ is also found at the boundary of adjacent weld layers, where appears epitaxial solidification.
参考文献
| [1] | V.V. Vasiliev;A.F. Razin.Anisogrid composite lattice structures for spacecraft and aircraft applications[J].Composite structures,20061/2(1/2):182-189. |
| [2] | 益小苏;张明;安学锋;刘立朋.先进航空树脂基复合材料研究与应用进展[J].工程塑料应用,2009(10):72-76. |
| [3] | 邱启艳;程文礼;徐洪波;陈静.国内航空复合材料工程化应用相关问题探讨[J].航空制造技术,2013(15):77-81. |
| [4] | 王玉华;陈洁;占小红;刘红兵;王苏明;李昊;邓景煜.复合材料Invar模具制造技术分析[J].航空制造技术,2014(11):93-95,99. |
| [5] | 黄钢华;张冬梅;晏冬秀;杨霓虹;刘卫平.Invar钢模具制造工艺研究[J].航空工程进展,2011(4):485-488. |
| [6] | 陈昀;张明霞;苗承鹏;杨秉贤.Ni36Fe因瓦合金-老材料和新用途[J].金属世界,2009(6):92-97. |
| [7] | 赵玥;吴爱萍;YutakaSSato;HiroyukiKokawa.Invar36合金搅拌摩擦焊焊缝的低温韧性[J].焊接学报,2011(12):89-92. |
| [8] | 廖志谦;刘希林;周川;张建欣.钛合金大厚板窄间隙焊接接头三维应力数值模拟计算[J].中国有色金属学报,2010(z1):393-398. |
| [9] | M.JEYAKUMAR;T.CHRISTOPHER.基于结构完整性评定方法和有限元分析并考虑焊接残余应力的焊接缺陷评估[J].中国有色金属学报（英文版）,2013(05):1452-1458. |
| [10] | 张敏;周小华;李继红;王莹.中厚板CO2多层多道焊对接接头焊接残余应力及其分布[J].西安理工大学学报,2007(4):394-397. |
| [11] | 李陈宾;刘黎明.激光-电弧复合热源焊接钛合金薄板T形结构件[J].焊接学报,2012(1):29-32. |
| [12] | 曾惠林;皮亚东;王新升;王世新;张杰.长输管道全位置激光-电弧复合焊接技术[J].焊接学报,2012(11):110-112. |
| [13] | Claus Bagger;Flemming O. Olsen.Review of laser hybrid welding[J].Journal of laser applications,20051(1):2-14. |
| [14] | 高明;谭兵;冯杰才;曾晓雁;严军.工艺参数对AZ31镁合金激光-MIG复合焊缝成形的影响[J].中国有色金属学报,2009(2):222-227. |
| [15] | 秦国梁;苏玉虎;王术军.铝合金/镀锌钢板Nd：YAG激光+MIG电弧复合热源熔-钎焊接头的组织与性能[J].中国有色金属学报（英文版）,2014(4):989-995. |
| [16] | 何晓蓉;高建军.精密殷钢模具加工工艺[J].模具工业,2002(5):56-58. |
| [17] | 张家铭 .民机复材结构用Invar钢模具焊接工艺优化研究[D].哈尔滨工业大学,2013. |
| [18] | G. Li, M. Gao;C. Chen;C. Zhang.Characterisation comparison of laserand laser–arc hybrid welding of Invar 36 alloy[J].Science and Technology of Welding and Joining,20141(1):30-37. |
| [19] | Pei-quan Xu;Chen-ming Bao;Feng-gui Lu;Chun-wei Ma;Jian-ping He;Hai-chao Cui;Shang-lei Yang.Numerical simulation of laser-tungsten inert arc deep penetration welding between WC-Co cemented carbide and invar alloys[J].The International Journal of Advanced Manufacturing Technology,20119/12(9/12):1049-1062. |
| [20] | P.Q. Xu.Dissimilar welding of WC-Co cemented carbide to Ni_(42)Fe_(50.9)C_(0.6)Mn_(3.5)Nb_3 invar alloy by laser-tungsten inert gas hybrid welding[J].Materials & design,20111(1):229-237. |
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