Influence of wire feeding speed on properties of laser weld-brazed joints of aluminum/steel
-
摘要: 采用光纤激光器对铝/钢异种金属搭接接头进行激光填丝熔钎焊试验研究。分析了送丝速度对焊缝成形质量、金属间化合物层厚度及力学性能的影响。试验结果表明，选择适当的送丝速度，利用铝和钢的不同熔点，使铝母材刚好熔化但是钢母材不熔化，熔化的铝母材与填充金属一起铺展在钢母材表面并与其实现钎焊连接，可形成优质的熔钎焊接头。当送丝速度小于3.5 m/min时，易形成硬脆性金属间化合物而导致焊缝开裂。金属间化合物层厚度应控制在一定范围内，方可保证接头性能。当送丝速度为4.5 m/min时，焊接接头强度有所提高，其线载荷达到203.5 N/mm，约为铝合金母材抗拉强度的83.7%。Abstract: Experimental study on weld-brazing of aluminum/steel dissimilar metal by fiber laser was carried out. The influences of wire feeding velocity on weld performance,intermetallic compounds thickness and mechanical properties were studied. The test results showed that high quality weld-brazed joints could be obtained by choosing the appropriate filler velocity. By using different melting points of aluminum and steel,the aluminum was just melted but the steel was not melted. The melted aluminum and the filler metal spread on the surface of steel,brazed weld was achieved. When the wire feeding velocity is less than 3. 5 m/min,it is easy to form hard and brittle intermetallic compounds and lead to weld cracking. The thickness of the intermetallic compounds should be controlled within a certain range to ensure joint quality. When the wire feeding velocity is 4. 5 m/min,the strength of the joint is improved,and the linear load can reach 203. 5 N/mm,which is about 83. 7%of that of aluminum alloy.
-
-
[1] 樊丁, 王斌, 李春玲, 等. 铝/钢异种金属电弧辅助激光对接熔钎焊方法[J]. 焊接学报, 2015, 36(1): 15-18. [2] Meco S, Pardal G, Ganguly S, et al. Application of laser in seam welding of dissimilar steel to aluminium joints for thick structural components [J]. Optics and Lasers in Engineering, 2015, 67: 22-30.
[3] 李玉龙, 姜智超, 禹业晓. 铝合金与镀锌钢薄板熔钎焊接头组织与力学性能[J]. 材料工程, 2010(10): 82-85. [4] Meco S, Ganguly S, Williams S, et al. Effect of laser processing parameters on the formation of intermetallic compounds in Fe-Al dissimilar welding[J]. Journal of Materials Engineering and Performance, 2014, 23(9): 3361-3370.
[5] 高伟. 钢/铝异种金属对接接头光纤激光填丝熔钎焊研究[D].上海: 上海交通大学硕士学位论文, 2014. [6] 张明军, 陈根余, 李时春, 等. 车用铝合金与镀锌钢光纤激光搭接焊试验研究[J]. 中国激光, 2011, 6(6), 1-6. [7] El-Hebeary M R, Megahed H, Elziady N. Investigation on electron beam welded copper to AISI 316 stainless steel joints [J].Journal of Xiamen University (Natural Science), 2002, 41(10): 90-91.
[8] Laukant H, Wallmann E, Müller M, et al.Fluxless laser beam joining of aluminum with zinc-coated steel [J]. Science and Technology of Welding and Joining, 2005, 10(2): 219-226.
[9] Martinieu A, Shabadi R, Deschamps A, et al. Dissimilar material joining using laser aluminum to steel using zinc-based filler wire[J]. Optics & Laser Technology, 2007, 39(3): 652-661.
[10] Takemoto T, Kimura S, Kawahito Y, et. al. Fluxless joining of aluminium alloy to steel by laser irradiation method[J]. Journal of Light Metal Welding and Construction, 2008, 46(7): 300-308.
[11] 石常亮, 何鹏, 冯吉才, 等. 镀锌钢板CMT熔钎焊界面区组织与接头性能[J]. 焊接学报, 2006, 27 (12): 61-64. [12] 宋建岭, 林三宝, 杨春利, 等. 铝与钢异种金属电弧熔-钎焊研究与发展现状[J]. 焊接, 2008(6): 6-9. [13] 林三宝, 马广超, 宋建岭, 等. 铝合金/镀锌钢TIG熔钎焊接头界面组织及力学性能[J]. 焊接, 2009(2): 34-37. [14] 宋建岭, 林三宝, 杨春利, 等. 特种钎剂辅助铝/钢异种合金TIG熔-钎焊[J]. 焊接学报, 2010, 31(2): 45-48. [15] 石玗, 何翠翠, 黄健康, 等. 几种铝钢异种金属熔钎焊工艺的对比与分析[J]. 焊接学报, 2014, 35(5): 1-4. [16] Zhu Z T, Wan Z D, Li Y X, et al. Intermediate layer, microstructure and mechanical properties of aluminum alloy/stainlesssteel butt joint using laser-MIG hybrid welding-brazing method[J]. International Journal of Modern Physics B, 2017, 31(16-19): 1-7.
[17] Yang J, Li Y L, Zhang H. Microstructure and mechanical properties of pulsed laser welded Al/steel dissimilar joint [J]. Transactions of Nonferrous Metals Society of China, 2016, 26(4): 994-1002.
[18] 李猛, 陈树海, 杨磊磊, 等. 铝合金/碳钢激光-TIG复合热源熔钎焊工艺与接头显微结构分析[J]. 焊接学报, 2016, 37(12): 21-24. -
期刊类型引用(0)
其他类型引用(2)
计量
- 文章访问数: 47
- HTML全文浏览量: 14
- PDF下载量: 16
- 被引次数: 2
下载:
