[1] [1] Shen Lian. Materials of Mechanical Engineering [M]. Beijing: Mechanical Industry Press, 1999. 83～85 (in Chinese)

[2] [2] R. Sagaro, H. Carvajal, J. S. Ceballos et al.. Nd∶YAG laser surface hardening for steels and cast iron [J]. Revista de Metalurgia, 2001, 37(5):607～615

[3] [3] J. D. Kim, J. K. Jung, B. C. Jeon et al.. Wide band laser heat treatment using pyramid polygon mirror [J]. Optics and Laser in Engineering, 2001, 35(5):285～297

[4] [4] P. Deprez, J. F. Coutouly, J. Crampon et al.. Surface transformation hardening of steels with CW CO2 laser [J]. Lasers in Engineering, 1999, 8(2):105～117

[5] [5] A. N. Safonov, S. I. Aleksenko. Effect of laser treatment on the wear resistance of steels [J]. Metal Science and Heat Treatment, 1998, 40(9～10):399～401

[6] [6] S. K. Putatunda, L. Bartosiewicz, R. J. Hull et al.. Laser hardening of austempered ductile cast iron [J]. Materials and Manufacturing Processes, 1997, 12(1):137～151

[7] [7] M. N. Kryanina, A. M. Bernshtein. Liquid phase carburizing of the surface of structureal steels with the use of laser radiation [J]. Soviet Surface Engineering and Applied Electrochemistry (USA), 1990, (2):41～47

[9] [9] Shen Shuming. Study of Laser Carburizing and Laser Siliconizing to Strengthen Low Carbon Steel Surface in the Salt Solution [D]. Master Thesis of Xi'an University of Technology, 2001. 23 (in Chinese)