[1] Q. B. Gao, Beam Welding Technology of Valve (China Machine Press, Beijing, 1994) pp. 305-418.

[2] J. J. Wang, Laser Processing Technology (China Metrology Press, Beijing, 1992) pp. 156-168.

[3] X. L. Wang and Q. G. Zheng, J. Optoelectron..Laser (in Chinese) 13, 285 (2002).

[4] Z. G. Cai, Wear and Break of Metal (Shanghai Jiaotong University Press, Shanghai, 1985) pp. 1-78.