Laser surface remelting of medium Ni-Cr infinite chilling cast iron was performed with a continuous wave CO2 laser beam with the power of 7 KW under the argon shielding. The microstructural analysis of the laser remelted layer by optical microscope shows that the laser remelted layer consists of three zones, which is the melting zone, the transition zone and the heat affected zone. The size of the dendrite of the melting zone is only in the 1/10 to 1/30 range of that of the substrate. The distribution of the hardness of the laser remelted layer was detected, and the carrying capacity of rolling steel was also field-tested. The results show that both the hardness of the remelted layer and the carrying capacity all increase,especially, the carrying capacity was 50% increased compared with the substrate.
参考文献
| [1] | Alejandro Sanz .New coatings for continues casting rolls[J].Surface and Coatings Technology,2004,177-178:1-11. |
| [2] | Tomida S.;Nakata K.;Shibata S.;Zenkouji I.;Saji S. .Improvement in wear resistance of hyper-eutectic Al-Si cast alloy by laser surface remelting[J].Surface & Coatings Technology,2003(0):468-471. |
| [3] | Janez Grum;Roman Sturm .A new experimental technique for measuring strain and residual stresses during a laser remelting process[J].Journal of Materials Processing Technology,2004(3):351-358. |
| [4] | Kurz W;Fisher J.Fundamentals of Solidification[M].Acdemannsdors,Switzerland:Transactions Technical Publications,1989:67. |
| [5] | Guan Zhenzhong.The handbook of laser processing principle and application[M].北京:中国计量出版社,1998 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%