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Volume 26 Issue 5
Sep.  2013
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Laser suface alloying of cylinder bore gray cast iron with Ni-Ti by Nd:YAG laser

  • 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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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

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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