Repair welding of cold-work tool steels in cold is very risky and almost impossible by conventional processes. The application of pulse shaping in laser cladding with wire to avoid the solidification problems in relevant steel is demonstrated. The results show that sound remelting and/or cladding can be achieved by the right selection of laser parameters and pulse shape, i.e. long pulse duration, moderate pulse peak powers and ramped-down pulse shape. Despite the defects and softening in the cladding due to the formation of retained austenite, the cladding shows better wear resistance at lower loads compared to the heat-treated base material.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | D. Klobcar, J. Tusek and L. Kosec: Int. J. Mater. Res., 2009, 100(5), 713.[2 ] D. Klobcar, J. Tusek, B. Taljat, L. Kosec and M. Muhic: Int. J. Mater. Res., 2008, 99(9), 1006.[3 ] F.J. Winsor: ASM Handbook Volume 6: Welding Brazing and Soldering, ASM International, 1993, 1625.[4 ] W.T. Preciado and C.E.N. Bohorquez: J. Mater. Process. Technol., 2006, 179, 244.[5 ] S. Thompson: Handbook of Mold, Tool and Die Repair Welding, Woodhead Publishing Limited, Abington, 1999, 22.[6 ] M. Vedani: J. Mater. Sci., 2004, 39, 241.[7 ] Y. Sun, H. Sunada and N. Tsujii: ISIJ Int., 2001, 41, 1006.[8 ] E. Capello, D. Colombo and B. Previtali: J. Mater. Process. Technol., 2005, 164-165, 990.[9 ] M. Doubenskaia and I. Smurov: Appl. Surf. Sci., 2006, 252, 4472.[10] M.S.F. de Lima: Mater. Res., 2005, 8, 323.[11] S. Kralj, N. Saki and B. Bauer: Weld. World, 2005, 49, 223.[12] F. Malek Ghaini, M.J. Hamedi, M.J. Torkamany and J. Sabbaghzadeh: Scripta Mater., 2007, 56, 955.[13] B. Kosec, G. Kosec and M. Sokovi: Arch. Mater. Sci. Eng., 2007, 28(3), 182.[14] H.N. Bransch, D.C. Weckman and H.W. Kerr: Weld. J., 1994, 6, 141.[15] V. Pirtovsek, T. Kugler, G. Kugler, P. Fajfar, M. Fazarinc and I. Ter· |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%