Nickel base superalloy has been widely used in key parts in aerospace field for its excellent heat resistance and wear resistance, but some problems always occur in laser cladding layer produced directly with different commerce nickel base superalloy powder as cladding powder, such as lower hardness or bad formation accompanying with higher hardness.

The concept on producing Fe-matrix in-situ synthesized particles reinforced composite coatings by means of energy fluctuation and concentration fluctuation in melt by jointly adding of multi strong-carbide-formation elements and carbon is used in laser producing Ni-matrix composite. By adding strong-carbide-formation elements Ti, Zr, W and C into Inconel 625 powder, Ni-matrix composite reinforced by in-situ synthesized particles can be produced by laser cladding or laser alloying, without pores and cracks. The microstructure of the composite characterizes the dispersive and homogeneous precipitation of about 104/mm2 particles in micron size distributed homogeneously on γ-Ni dendritic. The average micohardness of the composite is above HV0.2400. EDAS analysis indicates that there are some proportions of strong-carbide-formation elements Ti, Zr, Nb, Mo, W and C in the particles, so they can be called as complex carbide.

The influence of C content and W content in powder joined is specially discussed about.

Topics
Transition metals, Chemical elements, Alloys, Carbides, Composite materials, Materials synthesis and processing
1.
Xu
Qiang
,
Zhang
Qinghong
,
Han
Jiecai
 &
Hao
Xiaodong
. (
2002
)
Current status of R & D and prospects of advanced high-temperature materials
,
Journal of Solid Rocket Technology
3
,
51
–
55
.
Google Scholar
 
2.
Ye
Jun
. (
1978
)
American Nickel Base Superalloy
,
Beijing Science Press
,
48
.
Google Scholar
 
3.
Zhong
Minlin
,
Liu
Wenjin
,
Huang
Ting
 &
He
Jinjiang
. (
2005
)
Laser rapid manufacturing of special pattern Inco 718 nickel based alloy component
, in
Proceedings of SPIE-The International Society for Optical Engineering
,
Beijing, China
,
59
–
66
.
Google Scholar
 
4.
Tuominen
Jari
,
Honkanen
Mari
,
Honkanen Jari Vihinen
Jorma
,
Vuoristo
Petri
 &
Mantyla
Tapio
. (
2002
)
Corrosion resistant nickel superalloy coatings laser-clad with a 6 kW high power diode laser (HPDL
), in
Proceedings of SPIE-The International Society for Optical Engineering
,
Osaka, Japan
,
59
–
64
.
Google Scholar
 
5.
Goswami
G.L.
,
Kumari
Santosh
,
Galun
R.
 &
Mordike
B.L.
 (
2003
)
Laser cladding of nickel based carbide dispersion alloys for hardfacing applications
,
Lasers in Engineering
1
,
35
–
44
.
Google Scholar
 
6.
Liu
Ximing
. (
2006
)
Mechanism and control of the nickel based alloy + WC laser cladded layer microstructure
,
Applied Laser
5
,
299
–
302
, 306
Google Scholar
 
7.
Ma
Mingxing
. (
2007
)
Investigation on laser producing Fe-based composite coatings reinforced by in-situ synthesized particles Microstructure and tensile fracture behaviour of Al-Si-Mg casting alloys
, Ph.D. thesis,
Tsinghua University
,
China
.
Google Scholar
 
8.
B.C.
Коваленко
.
Li
Yunsheng
,
Zheng
Yunrong
 (ed) (
1983
)
Metallography color-developing agent handbook
,
China Defense Industry Press
,
22
–
24
Google Scholar
 
9.
Cheng
Tianyi
,
Zhang
Shouhua
. (
1990
) Rapid solidifying technology and new alloy,
China Astronautics Publishing House
,
158
–
174
.
10.
Niu
Xin
,
Chao
Mingju
,
Wang
Wenli
,
Yuan
Bin
 &
Liang
Erjun
. (
2006
)
In situ synthesized NbC particulate reinforced Ni-based composite coatings by laser cladding
,
Chinese Journal of Lasers
7
,
987
–
992
Google Scholar
 
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© 2008 Laser Institute of America.
2008
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