Composition and properties continuously changed gradient coating fabricated by high power diode laser - Details

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Abstract：

To　obtain　gradient　coating　with　changed　components　and　properties,　the　gradient　coating　comprised　of　two-kind　metal　powders　(Ni25/Ni60　and　AlSi12/Fe62)　is　fabricated　with　paraxonic　synchronism　powder　feeding　mode,　2.5　kW　high　power　diode　laser　and　4　channels　powder　system.　The　9-mm　width　spiral　gradient　coatings　on　45#　steel　stick　are　achieved.　Meanwhile,　energy　dispersive　spectroscopy　(EDS),　microstructure　and　micro-hardness　of　coating　are　studied.　The　experimental　results　show　that　along　the　forming　direction,　the　content　of　element　Cr　and　the　micro-hardness　decrease　continuously　in　Ni25/Ni60　gradient　coating;　the　contents　of　elements　Fe,　Cr　and　Al　change　continuously　in　AlSi12/Fe62　gradient　coating;　the　microstructures　in　both　coatings　change　obviously.

Keyword：

Microhardness Energy dispersive spectroscopy Microstructure Fabrication Laser beam welding Semiconductor lasers Aluminum coatings Power semiconductor diodes Powder metals Diodes

Author Community：

[ 1 ] [Wu, Qiang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Wang, Xubao]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Niu, Jianqiang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Yang, Wuxiong]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Xiao, Rongshi]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Zuo, Tiechuan]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China