Microstructure of in-situ synthesized chromium carbide Ni-base composite coating by laser cladding
-
1.
Department of Mechanical Engineering , Yanbin University, Yanji 133002, China;
-
2.
Liaoning Provincal Key Laboratory of Advanced Materials, Shenyang University, Shenyang 110044, China
-
Corresponding author:
REN Jingri, jrren@ybu.edu.cn
;
-
Received Date:
2013-05-06
Accepted Date:
2013-05-24
-
Abstract
In order to prepare ceramic reinforced Ni-base composite coating, chromium carbide Ni-base composite coating was prepared on the surface of 45# steel by laser cladding, the microstructure, phase structure and microhardness of the coating were studied. The shapes of chromium carbide ceramic particles were quadrangular, hexagonal and irregular block. By the analysis, quadrangular chromium carbide was Cr3C2, hexagonal chromium carbide was Cr7C3,the composition of irregular blocky chromium carbide was indeterminacy, may be Cr3C2 or Cr7C3.The microhardness of the coating was 3.5 times of the substrate. The coating had high microhardness and dense microstructure. The results indicated that the coating was mainly composed of Cr-Ni-Fe-C, C, Cr7C3 and Cr3C2.The microstructure of the composite layer was proved to be homogeneous and dense. A good metallurgical combination was formed at the boundary of the coating layer and substrate. The research plays a vital role in theoretical research and practical application of the in-situ synthesized chromium carbide Ni-base composite coating.
-
-
References
|
[1]
|
ZHANG Ch Ch, SHI Y. Current status and development of high thickness coating by laser cladding technology[J].Laser Technology,2011, 35(4):448-452(in Chinese). |
|
[2]
|
LI G, LIU L, HONG J Y, et al. Study on microstructure and performance of laser cladding Ni-Zr-Nb-Al amorphous composite coating[J].Laser Technology,2011,35(2):185-188(in Chinese). |
|
[3]
|
CUI A Y, HU F Y, LU C L , et al. Microstructure and property of laser cladding Ti-matrix functional gradient layer [J].Laser Technology,2012,36(2):262-264(in Chinese). |
|
[4]
|
MAO M H, WU G, WU Q L, et al. Microstructure and corrosion behaviorof in-situ Cr7C3 ceramic prepared by laser cladding[J].Corrosion & Protection,2012,33(6):466-469(in Chinese). |
|
[5]
|
ZHONG W H, LIU G Zh, GAO Y, et al. Effect of WC on microstructure and propertise of Ni-Cr3C2 cladding layer[J].Material & Heat Treatment,2012,41(10):153-156(in Chinese). |
|
[6]
|
MAO M H. Research on properties of Cr7C3 on Q235 steel surface prepared by laser cladding[J].Science ＆ Technology Inrmation,2012,33(5):111-113(in Chinese). |
|
[7]
|
ZHANG D W, LEI T C.The microstructure and erosive-corrosive wear performance of laser-clad Ni-Cr3C2 composite coating[J].Wear,2003,255(2):129-133. |
|
[8]
|
YUAN Q L, FENG X D, CAO J J, et al. Effect of laser scanning speeds on the microstructure and corrosion resistance of laser cladding layers[J]. Laser Technology,2011,35(2):163-166(in Chinese). |
|
[9]
|
LOU D Y, HE Ch L, SHUO Sh. Microstructure and performances of graphite scattered Cr3C2-NiCr composites prepared by laser processing[J]. Materials Letters,2013,93(3):304-307. |
|
[10]
|
ZHANG D W, LI T, LEI T C. Laser cladding of Ni-Cr3C2/(Ni+Cr) composite coating[J]. Surface & Coatings Technology,1998,110(2):81-85. |
|
[11]
|
BETTS J C. The direct laser deposition of AISI316 stainless steel and Cr3C2powder[J].Journal of Materials Processing Technology,2009,209(2):5229-5238. |
|
[12]
|
LI H, YAN W, CHEN J, et al. Study of Fe-Cr-C hypereutectic alloy formed in-sutu under unidirectional solidification[J].Foundry Technology,2007,28(3):307-311(in Chinese). |
-
-
Proportional views
-
Map
DownLoad: