The WC/Ni hard metal coating was synthesized by laser cladding with coaxial feeding of its formation elements W/C/Ni powder mixture, basing upon the unique physical and chemical metallurgy within the melt pool. A plump shape WC/Ni layer free of cracks was obtained. The composition distribution of the clad layer, the dissolution behavior of the adding W and C/Ni clad powders and the synthesizing of WC were investigated. The microstructure, phase and WC growth morphology were analyzed. The WC particles synthesized by laser have rectangular or quadrangle cross-section shape with size of 2∼30µm. Step, rotary and cross growth morphologies of WC formation were observed in the synthesized layer. In addition to the WC, the synthesized layer contains phases like W2C 、 CW3 、 FeW3C 、 Fe6W6C 、 W3O 、 W、C、(Fe，Ni).

1.
Frenk
,
A.
 &
Wagniere
,
J.D.
,(
1991
)
Laser cladding with cobalt-based hardfacing alloys
,
J. Phys., IV
1
:
65
–
68
Google Scholar
 
2.
Yang
,
S
,
Zhong
,
M.
 &
Liu
,
W.
(
2003
)
TiC Particulate Composite Coating Produced In-situ by Laser Cladding
.
Mater Sci & Eng A.
343
(
1-2
):
57
–
62
https://doi.org/10.1016/S0921-5093(02)00361-1
Google Scholar
Crossref
Search ADS
 
3.
Zhong
,
M.
,
Liu
,
W.
,
Yao
,
K.
,
Goussain
,
J.C.
,
Mayer
,
C.
,
Becker
,
A.
(
2002
)
Microstructural evolution in high power laser cladding of Stellite 6+WC layers
,
Surface & Coatings Technology
,
157
(
2-3
):
128
–
137
https://doi.org/10.1016/S0257-8972(02)00165-2
Google Scholar
Crossref
Search ADS
 
4.
Villar
,
R.
 (
1990
)
Laser cladding
J. Laser. Appl.
,
11
(
2
):
64
–
79
https://doi.org/10.2351/1.521888
Google Scholar
Crossref
Search ADS
 
5.
Gassmann
,
R.C.
 (
1996
)
Laser cladding with (WC+W2C)/Co-Cr-C and (WC+W2C)/Ni-B-Si composites for enhanced abrasive wear resistance
,
Material Science and Technology
,
12
:
691
–
696
https://doi.org/10.1179/026708396790122459
Google Scholar
Crossref
Search ADS
 
6.
Wu
,
X.
,
Zeng
,
X.
Zhu
,
P.
 (
1997
)
Research on the cracking tendency of Nickel based WC metallic ceramic coating
.
Journal of Chinese Laser (in Chinese)
,
A24
(
6
):
570
∼
576
Google Scholar
 
7.
Yang
,
Y.
,
Yan
,
Y.
 (
1992
)
Research on technique and porosities in laser cladding WC-Co with powder feeding
.
Transaction of Material Heat Treatment (in Chinese)
,
13
(
2
):
33
∼
37
Google Scholar
 
8.
Yang
,
Y.
,
Man
,
H.C.
 (
2000
)
Microstructure evolution of laser clad layers of W-C-Co alloy powders
.
Surface and Coatings Technology
, 2000,
132
:
130
∼
136
https://doi.org/10.1016/S0257-8972(00)00909-9
Google Scholar
Crossref
Search ADS
 
9.
Chen
,
Y.
,
Zhong
,
M.
,
Liu
,
W.
,
Li
,
F.
,
Ning
,
G.
 (
2002
)
Por osities during laser powder feed cladding of WC/Co hard metal coating
.
Transaction of Material Heat Treatment (in Chinese)
,
23
(
2
):
49
∼
53
Google Scholar
 
10.
Przybyøowicz
,
J.
,
KusinÂshi
,
J
 (
2001
)
Structure of laser cladded tungsten carbide composite coatings
.
Journal of Materials Processing Technology
,
109
:
154
∼
160
https://doi.org/10.1016/S0924-0136(00)00790-1
Google Scholar
Crossref
Search ADS
 
11.
Cerri
,
W.
,
Martinella
,
R.
,.
Mor
,
G.P
 (
1991
)
Laser deposition of carbide-reinforced coatings
.
Surface and Coatings Technology
.
49
:
40
∼
45
https://doi.org/10.1016/0257-8972(91)90028-U
Google Scholar
Crossref
Search ADS
 
12.
Techel
,
A.
,
Luft
,
A.
,
Muller
,
A.
(
1995
)
Production of hard metal-like wear protection coatings by CO2 laser cladding
.
Optical and Quantum Electronics
.
27
:
1313
∼
1318
Google Scholar
Crossref
Search ADS
 
13.
Luft
,
A.
,
Techel
,
A.
,
Nowotny
,
S.
(
1995
)
Microstructu res and Dissolution of Carbides Occurring during the Laser Cladding of Steel with Tungsten Carbide Reinforced Ni- and Co-hard Alloys
.
Prakt. Metallogr.
32
(
5
):
235
∼
247
Google Scholar
Crossref
Search ADS
 
14.
Riabkina-Fishman
,
M.
,
Rabkin
,
E.
,
Levin
,
P.
(
2001
)
Laser produced functionally graded tungsten carbide coatings on M2 high-speed tool steel
.
Materials Science and Engineering
.
A302
:
106
∼
114
https://doi.org/10.1016/S0921-5093(00)01361-7
Google Scholar
Crossref
Search ADS
 
15.
Zhong
,
M.
,
Yao
,
K.
,
Liu
,
W.
,
Goussain
,
J.C.
,
Mayer
,
C.
,
Becker
,
A.
(
2001
)
High-power laser cladding Stellite 6+WC with various volume rate
,
Journal of Laser Applications
,
13
(
6
):
247
–
251
https://doi.org/10.2351/1.1418706
Google Scholar
Crossref
Search ADS
 
16.
Tjong
,
S.C.
,
Mal.
Z.Y.
(
2000
)
Microstructural and mechanical characteristics of in situ metal matrix composites
.
Materials Science and Engineering
,
29
(
3-4
):
49
∼
113
https://doi.org/10.1016/S0927-796X(00)00024-3
Google Scholar
Crossref
Search ADS
 
17.
Kim
,
C.S.
,
Rohrer
,
G.S.
,
Geometric and Crystallographic Characterization of WC Surfaces and Grain Boundaries in WC Composites
.
Interface Science
. 03.27.03, in press, (http://mimp.mems.cmu.edu/papers/63_02.pdf)
This content is only available via PDF.
© 2004 Laser Institute of America.
2004
Laser Institute of America
You do not currently have access to this content.