Study on microstructure and performance of laser cladding Ni-Zr-Nb-Al amorphous composite coating
-
Received Date:
2010-05-31
Accepted Date:
2010-06-07
-
Abstract
In order to prepare Ni-based amorphous coatings,Ni60.5Zr19.63Nb18.07Al1.8 amorphous composite coating was prepared on 45 steel substrate by means of laser cladding.Then the microstructure and phase of the coating were analyzed and the parameters characterizing the mechanical and corrosion resistance were measured.The results show that a great deal of dendritic and cystiform crystal phases exist in the coating.X-ray diffraction analysis reveals that amorphous,intermetallic compound such as NiZr2,Ni8 Nb,Al2O3 and Fe-Ni,and some other phases present in the coating.Content of white amorphous phase is up to maximum at the power of 3600W,and microstructure is most fine;hardness reaches maximum at the power of 3000W and can be up to 2399.9HK at topmost surface,while surface wear weight loss is 0.5921 mg·mm-2;coating corrosion resistance is the best at the power of 3600W.The minimum obtuse current density is 3.05mA/m2,and passive potential widest range is 1170mV;Ni60.5Zr19.63Nb18.07Al1.8 designed according to the new criterion has strong glass forming ability.
-
-
References
|
[1]
|
WANG W F,SUN F J,WANG M C.Study of Cu-base coating on aluminum alloy by laser cladding[J].Laser Technology,2008,32 (3):240-243 (in Chinese). |
|
[2]
|
SUN R L,YANG X J.Microstructure of TiC and C-NiCrBSi laser clad layers on Ti-6Al-4V alloy substrate[J].Heat Treatment of Metals,2005,25(2):93-96(in Chinese). |
|
[3]
|
GONG Y P,LU W Y,YUAN X M.Microstructure and properties of TiB2 reinforced Co-based alloy coating by laser cladding[J].Laser Technology,2008,32(2):122-124(in Chinese). |
|
[4]
|
WANG C Sh,GAO Y L,PANG H J,et al.Composition design and laser cladding of Cu-Zr-Al amorphous alloy[J].Chinese Journal of Lasers,2007,34(s1):16-18(in Chinese). |
|
[5]
|
DAI J B,LI J Sh,KOU H Ch.Crystallization kinetics of Ni59Zr16Ti13 Si3Sn2Nb7 amorphous alloys[J].The Chinese Journal of Nonferrous Metals,2008,18(4):626-629(in Chinese). |
|
[6]
|
CHEN W R,WANG Y M,QIANG J B.The electron concentrationconstant and atomic size-constant criterion in Zr-based bulk metallic glasses[J].Chinese Journal of Materials Research,2002,16 (2):219-224(in Chinese). |
|
[7]
|
CHEN W R,WANG Y M,QIANG J B,et al.Composition design and microstructure characterization of Zr-Al-Ni-Cu bulk amorphous alloys[J].Acta Metallurgica Sinica,2002,38 (4):421-426 (in Chinese). |
|
[8]
|
HE Z Q,WANG X L,QUAN B Y.Development in composition design criterions and characterizing of glass forming ability for bulk amorphous alloys[J].Transactions of Materials and Heat Treatment,2006,27(1):28-32(in Chinese). |
|
[9]
|
QIANG J B,ZHANG W,INOUE A.Effects of Al and Ti additions on the thermal stability,glass-forming ability and mechanical properties of Ni60Nb20Zr20 glassy alloy[J].Materials Science and Engineering,2008,B148 (1/3):114-I18. |
-
-
Proportional views
-
Map
DownLoad: