吉林大学学报(工学版) ›› 2010, Vol. 40 ›› Issue (06): 1567-1571.

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Microstructure and propoerties of the coating formed by laser cladding of Al-Ti-C powders on magnesium

YANG Yue1,ZHUANG Yu2,YOU Xiao-jun3   

  1. 1.College of |Materials Science and Engineering,Changchun University of Technology,Changchun 130012|China;2Continental Automotive Changchun Co Ltd|Changchun 130033,China;3.Factory of Pipeline and Vessel|Shengli Petroleum and Chemical Construction Corporation,Binzhou 256600,China
  • Received:2008-12-24 Online:2010-11-01 Published:2010-11-01

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Abstract:

An attempt has been made to enhance the wear resistance of AZ91 magnesium alloy by laser surface cladding AlTiC powders(in the weight ration Ti∶C=1∶1, Al content ranges from 20%-40%) using a 1 kW Nd:YAG pulsed laser. The experiment was performed using different laser power densities of 1.67, 1.89, 2.20, 2.65 and 3.14×109 W/m2, and scan speed ranging from 0.5 mm/s to 2.5 mm/s. The microstructure of the modified surface layer was examined, the hardness and wear resistance were measured. The results showed that a cladding layer with a hardness of HV210 and 4 times as wear resistant as the untreated material was prepared using a powder containing 40% Al under the laser scan speed of 1.0 mm/s, laser power density of 2.20×109 W/m2.

Key words: materials surface and interface, magnesium alloys, laser cladding, wear resistance

CLC Number: 

  • TG113
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