脉冲宽度对超薄TiNi/不锈钢激光焊接头TiNi侧界面的影响
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摘要
在厚度为0.2 mm的TiNi合金/321不锈钢异种材料激光微焊接时,预置Ni作为填充材料,获得了TiNi合金/Ni/321不锈钢激光焊接头。研究了激光脉冲宽度对焊接接头TiNi侧界面的影响。结果表明,不同脉冲宽度下,TiNi合金侧界面区均由宽度不等的TiNi共晶层和TiNi_3金属间化合物层组成;随着脉冲宽度的增加,TiNi共晶层平均宽度逐渐减小,TiNi_3金属间化合物层平均宽度逐渐增加;界面区显微硬度随脉冲宽度的增加逐渐升高。TiNi母材熔化量和Marangoni流动的改变是影响接头该侧界面区宽度及显微硬度的主要原因。
TiNi alloy/Ni/321 stainless steel laser welding joint with thickness of 0.2 mm was obtained using Ni as filler material in laser micro-welding. The effect of laser pulse width on the TiNi side interface of the welding joint was studied. The results show that the interface zone of TiNi alloy side under different pulse widths is composed of TiNi eutectic layer and TiNi_3 intermetallic layer with different widths. With the increase of pulse width, the average width of TiNi eutectic layer gradually decreases, the average width of TiNi_3 intermetallic compound layer increases gradually, and the microhardness of interface zone increases. The change of the melting amount of TiNi and the flow of Marangoni are the main reasons that affect the width and microhardness of the interface zone.
TiNi alloy/Ni/321 stainless steel laser welding joint with thickness of 0.2 mm was obtained using Ni as filler material in laser micro-welding. The effect of laser pulse width on the TiNi side interface of the welding joint was studied. The results show that the interface zone of TiNi alloy side under different pulse widths is composed of TiNi eutectic layer and TiNi_3 intermetallic layer with different widths. With the increase of pulse width, the average width of TiNi eutectic layer gradually decreases, the average width of TiNi_3 intermetallic compound layer increases gradually, and the microhardness of interface zone increases. The change of the melting amount of TiNi and the flow of Marangoni are the main reasons that affect the width and microhardness of the interface zone.
引文
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[3]He Peng(何鹏),Li Haixin(李海新),Lin Tiesong(林铁松)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2013,42(11):2248
[4]Chen Yuhua(陈玉华),Ge Junwei(戈军委),Liu Fencheng(刘奋成)et al.Optics and Precision Engineering(光学精密工程)[J],2014,22(8):2075
[5]Wang Yingling(汪应玲),Li Hong(李红),Li Zhuoxin(栗卓新)et al.Journal of Materials Engineering(材料工程)[J],2008(9):48
[6]Li Minggao(李明高),Qiu Xiaoming(邱小明),Sun Daqian(孙大千)et al.Light Metals(轻金属)[J],2005,25(1):57
[7]Li H M,Sun D Q,Cai X L et al.Materials&Design[J],2012,39(1):285
[8]Li H M,Sun D Q,Cai X L et al.Optics&Laser Technology[J],2013,45:453
[9]Zhou Xingwen,Chen Yuhua,Huang Yongde et al.Journal of Alloys and Compounds[J],2018,735:2616
[10]Cao X,Jahazi M,Immarigeon J P et al.Journal of Materials Processing Technology[J],2006,171(2):188
[11]Sun Z,Ion J C.Journal of Materials Science[J],1995,30(17):4205
[12]Rizwan U H S,Wei J,Wen J X et al.Advanced Materials Research[J],2013,628:183
[13]Fukumoto S,Inoue T,Mizuno S et al.Science and Technology of Welding and Joining[J],2010,15(2):124
[14]Soysal T,Kou S,Tat D et al.Acta Materialia[J],2016,110:149
[15]Limmaneevichitr C,Kou S.Welding Journal[J],2000,79(11):126