[1] [1] C. J. Dawes. Laser welding of butt joints in low carbon steel sheets—process tolerance data［R］. TWI. No. 228/1983

[2] [2] M. N. Watson. Laser welding of structural steel with wire feed［R］. TWI. No. 264/1985

[3] [3] A. S. Salminen, V. P. Kujanp. Effect of wire feed position on laser welding with filler wire[J]. J. Laser Applications, 2003, 15(1): 2～10

[4] [4] I. A. Jones, S.T.Riches, J.W.Yoon et al.. Laser welding of aluminium alloys［R］. TWI. No. 517/1995