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Volume 26 Issue 5
Sep.  2013
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Article Navigation >  LASER TECHNOLOGY  > 2002 >  26(5): 327-329

Citation:
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Laser suface alloying of cylinder bore gray cast iron with Ni-Ti by Nd：YAG laser

  • 1.

    Center of Laser Process, Tsinghua University, Beijing, 100084

  • Received Date: 2001-07-17
  • Nd:YAG laser alloying Ni-Ti with pre placed coating on specific cylinder bore gray cast iron was investigated and smooth surface alloyed layers were available.This kind of laser alloying cast iron was quite sensitive to cracking.Crack free alloyed layers were possible with appropriate coating thickness,alloying parameters and preheating.The alloyed layer consists of alloyed zone,remelting zone and quenching zone,whose micro hardness is increased dramatically.The main microstructure of the alloyed layer is the hypoeutectic sub-stable structure.
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    [3] 刘文今,赵海云,钟敏霖 et al.高耐磨激光陶瓷合金化活塞环.高性能陶瓷论文集,北京:人民交通出版社,1998:268～272.
    [4] 刘要武,李雨田,谢冀汀 et al.光学精密工程,1999,7(3):43～46.
    [5] 陈传忠,孔翠荣,朱瑞富 et al.新技术新工艺,1996(2):22～23.
    [6] 李捷辉,袁银南.江苏理工大学学报,1997(7):35～39.
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Laser suface alloying of cylinder bore gray cast iron with Ni-Ti by Nd：YAG laser

  • 1. Center of Laser Process, Tsinghua University, Beijing, 100084
  • Received Date: 2001-07-17
  • Available Online: 2002-09-25

Abstract: Nd:YAG laser alloying Ni-Ti with pre placed coating on specific cylinder bore gray cast iron was investigated and smooth surface alloyed layers were available.This kind of laser alloying cast iron was quite sensitive to cracking.Crack free alloyed layers were possible with appropriate coating thickness,alloying parameters and preheating.The alloyed layer consists of alloyed zone,remelting zone and quenching zone,whose micro hardness is increased dramatically.The main microstructure of the alloyed layer is the hypoeutectic sub-stable structure.

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