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Transcript of ÷ 9 · 2012. 11. 8. · E-mail: [email protected] 1 % "¶KS354.7nm,G¡ áNe) ... + A± (852)...
2831
B2900A 33
536nm 15
2012 9 5ISSN: 1817-6 917
21 mm
23 mm
2 September 2012 www.laserfocusworld.com.cn Laser Focus World China
Laser Focus World China 2005 Laser Focus World LFW
LFW LFW
8031
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2012 9 5www.laserfocusworld.com.cn
10
13 : F-P 100Gbit/s
15 : 536nm
16 :
19 :
22 :
24 : OPO
26 :
28 :
31 :
33 : B2900A
7
36
40
http://www.rfhlasertech.com
Add: M-10Tel: 0755-86375012,18928466502,86375016Fax: 0755-86028961E-mail: [email protected]
1 354.7nm,200kHz
2 ,3 M2<1.2
4
5 Q
6 RS232
7
Excellent355, 355nm (2w-5w)
MBurn355, 355nm (0.5w-1.5w)
Nd:YAG CO²
(nm) 1,064 10,600
(mm x mm) 500 x 500 800 x 800
1/e² (μm) 31 405
● CO² YAG
● 4 kW
● 300 x 300 1,500 x 1,500 mm²
www.raylase.cn
September 2012 Issue 5www.laserfocusworld.com.cn
CONTENTSPhotonic Frontiers10 Quantum-Cascade Lasers: New designs expand capabilities of quantum-cascade lasers
Technologies Center13 Integrated Photonics: Integrated F-P laser array solves 100G problems
15 Semiconductor Lasers: Green laser diode emits at 536 nm
16 Terahertz Sources: Nanoantennas streamline photomixing terahertz source capabilities
19 Specialty Fiber:���������� ����������������������������������� ����������
22 Fiber Optics:������������������������� ������� ����������� by means of simple optical exchange
24 Tunable Sources: Broadband OPO spans the mid-IR, no tuning needed
Imaging Inside26 Biomedical Imaging: ��� ��������� ������������������������
Applications28 Laser Cladding: The analysis of laser cladding remanufacturing technology in repairing rotating equipment
31 Biophotonics: !��������������� �� ����� ��������������������� diagnosis
33 Diode Lasers: Applications of B2900A in the measurements of diode laser
7 News Breaks36 New Products40 Ad Index
Laser Focus World China, ISSN 1817-6917 is published bi-monthly by ACT International, Unit 1011, 10/F., New Kowloon Plaza, 38 Tai " �������� �#�" �� �#�� ���" ��#������������������ ��$���%����& �� �� �#��'���()�(�������� �#�����#�*"�+'���)�& �������2010. All rights reserved. This publication contains article reprinted from Laser Focus World magazine. Laser Focus World is exclusively owned and published by PennWell Corporation. PennWell Corporation is not responsible in any way for the editorial policy and expressly ������������� ���������� �#���������� ��������#��4������ ���������#������������ ����� ���� ������������� �� ��������� ������or reliability of products described herein that are products described by independent vendors.
About Laser Focus World ChinaLaunched in 2005, Laser Focus World China (LFWC) Bimonthly is the Chinese version of the world famous Laser Focus World magazine, which circulating controlled-free to average of 8,031 professionals in the laser and optoelectronic industry. Providing in-depth, timely information on current developments within the global laser and optoelectronic industry for our readers in China, LFWC selects some � � ������� ��<=%������ �� >���� ����?@��������� ��� ��� ���� ��&��������)�$�����>���� �������>��������#����)laserfocusworld.com.cn.
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X, Y, R, θ,
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GPIB RS-232
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CO2
1 m
CorActive
20kHz
80ns 1W Q
2mJ 40W
M2
1.4
536nm
100mW
B2900A
/ China / Hong Kong SAR (852) 2838 6298 (852) 2838 2766 478 13 B Adonis Mak [email protected] Mark Mak [email protected] Michael Tsui [email protected] Rossie Pang [email protected]
(86) 755 2598 8571 (86) 755 2598 8567 [email protected]
In My View Jeffrey Bairstow [email protected] Industrial Lasers David A. Belforte (1) 508-347-9324 [email protected] Valerie Coffey (1) 978-263-4485 [email protected] Photonic Frontiers Jeff Hecht 617-965-3834 [email protected] Imaging Conard Holton (1) 603-891-9161 [email protected] Europe D. Jason Palmer (44) 7960 363308 [email protected]
Adrienne Adler Suzanne Heiser Chris Hipp Sheila Ward Steve Archer Debbie Bouley
Christine A. Shaw (1) 603-891-9178 [email protected] / Stephen G. Anderson (1) 603-891-9320 [email protected] John Wallace (1) 603-891-9228 [email protected] Gail Overton (1) 603-305-4756 [email protected] Carrie Meadows (1) 603-891-9382 [email protected] Katherine Mclntosh (1) 603-891-9224 [email protected]
Frank T. Lauinger Robert F. Biolchini Mark Wilmoth
/ Christine A. Shaw Gloria S. Adams Laser Focus World, 98 Spit Brook
Road, LL-1, Nashua, NH 03062-5737 (1) 603-891-0123 www.laserfocusworld.com
ISSN 1817-6917 2012
News Breaks
7 Laser Focus World China www.laserfocusworld.com.cn September 2012
Hanamura Optics2012 7
Hanamura Optics Hanamura
Optics
Hanamura
Optics
TornadoTornado Medical Systems
Tornado HTVS
HTVS
HTVS
IPGIPG
IPG Kubilay Yildirim
2010
9.2% 2011 8.5%
2011 GDP
16 5
Z
1
30 Z
Oclaro OpnextOclaro Opnext Oclaro
Oclaro
Oclaro
2011 40G 100G
5
20128 21
2012
1500
News Breaks
8 September 2012 www.laserfocusworld.com.cn Laser Focus World China
SIM2Multimedia
CO
CO
USB2.0
5 30
10 10
40.4
OIFA
HR2000 LIBS
NASA 2011 11 HR2000
LIBS
HR2000
2000
2000
4
3000
2000
Photonic Frontiers
10 September 2012 www.laserfocusworld.com.cn Laser Focus World China
Jeff Hecht
2012 5 CLEO
Jérôme Faist
QCL 1994
[1]
10mW
Jérôme Faist
20%
IR
R.F. Kazarinov R.A. Suris 1971
[2]
Faist
20-
200
20%
3~300μm
10%
Faist
[3]
2009 Pranalytica
DARPA
3W 4.6μm
1 Daylight Solutions 3~20μm100mW
Photonic Frontiers
11 Laser Focus World China www.laserfocusworld.com.cn September 2012
0.86kA/cm2
12.7% [4]
Manijeh
Razeghi
4.9μm 5.1W
5mm
8μm
21%
27% [5]
400μm
4.4μm
120W 200ns
0.2% [6] 2
Daylight Solutions
Erik Takeuchi
4~5μm
2W
6μm
8μm 1.5W
80%
2010
Razeghi
5μm
40K 53%
[7]
4μm
2012 CLEO
Dundee
3.2μm 85nm [8]
Faist
3.3μm
450nm [9,10]
3~4μm ICL
3
2011
Jerry Meyer
170A/cm2
13.5% [11]
Meyer
CLEO
6μm
5.6μm
190 K
9.4μm [12]
CLEO
166 K
10.3μm
125 K
9.0μm 150 K[13]
0.3ps
CLEO Faist
2
(μm)
(W)
12108642
10
1
0.1
0.01
T = 298 K
Photonic Frontiers
12 September 2012 www.laserfocusworld.com.cn Laser Focus World China
CLEO Faist Andreas Hugi
7μm 490nm
10Hz [14]
Takeuchi
14~16μm
Takeuchi
Takeuchi Daylight
100 5.5
1. J. Faist et al., Quantum cascade laser, Science, 264, 553–
556 (April 1994).
2. R.F. Kazarinov and R.A. Suris, Possibility of ampli�cation
of electromagnetic waves in a semiconductor with a
superlattice, Fiz. Tekh. Poluprov., 5, 797–800 (1971); transl.
in Sov. Phys. Semicond., 5, 707–709 (1971).
3. R. Terazzi and J. Faist, New J. Phys., 12, 033045 (2010).
4. A. Lyakh et al., 3 W continuous-wave room temperature
single-facet emission from quantum cascade lasers based on
nonresonant extraction design approach, Appl. Phys Lett.,
95, 14, 141113 (2009).
5. Y. Bai et al., Room temperature quantum cascade lasers with
27% wall-plug ef�ciency, Appl. Phys. Lett., 98, 181102 (2011).
6. Y. Bai et al., High power broad area quantum cascade
lasers, Appl. Phys. Lett., 95, 221104 (2009).
7. Y. Bai et al., Quantum cascade lasers that emit more light
than heat, Nat. Photon., 4, 99 (February 2010).
8. T. Kruczek et al . , 3190–3275 nm tuneable, room
temperature, external cavity InAs/AlSb Quantum Cascade
Laser, CLEO Tech. Dig., paper CF1K.6 (2012).
9. A. Bismuto et al., Sb-free quantum cascade lasers in the
3–4 _m spectral range, Semicon. Sci. Technol., 27, 045013
(2012); doi:10.1088/0268-1242/27/4/045013.
10. S. Riedi et al., EC tuning of broadband QCL active region
designs around 3.3 _m and 8 _m, CLEO Tech. Dig., paper
CF1K.2(2012).
11. I. Vurgaftman et al., Rebalancing of internally generated
carriers for mid-infrared interband cascade lasers with very
low power consumption, Nat. Commun., 2, 585 (Dec. 13,
2011); doi:10.1038/ncomms1595.
12. C.L. Canedy et al., Improved interband cascade lasers for
LAMBDA=3-5.6 μm, CLEO Tech. Dig., paper CF1K.3 (2012).
13. L. Li et al., Interband cascade lasers at long wavelengths,
CLEO Tech. Dig., paper CF3K.2 (2012).
14. A. Hugi et al., Mid-IR broadband quantum-cascade laser
frequency comb, CLEO Tech. Dig., paper CTh3N.3 (2012).
a)
b)
c)
(light)e-
p+
p+ e-
e-
e-
e-
e-
p+ e-
p+ e-
3 a b
-
p
Technologies Center
13 Laser Focus World China www.laserfocusworld.com.cn September 2012
F-P 100Gbit/s
23
100G
VCSEL
1~10Gbit/s
100G OM3 /
50 m/125 m VCSEL
100m
Kotura Arlon Martin
10km 100GBase LR 100Gbit/s
IEEE 802.3
DFB
EA WDM
10G 100
Martin
20~24W 10G
1~2W 100G C CFP
iPhone 19
100G
10G
Martin 100G
800GHz 1300nm
4.5nm
1295.56nm 1300.05 1304.58nm
1309.14nm
4.5nm 2.1nm
25GHz
F-P
F-P
10,000 F-P
InP F-P
Kotura
F-P WDM
Kotura
1
WDM
InP
1 12
Gail Overton
Technologies Center
15 Laser Focus World China www.laserfocusworld.com.cn September 2012
536nmJeff Hecht
18
InGaN
532nm Nd YAG
Sumitomo
Electric 527nm
532nm
100mW
536.6nm
50mW
4.5 [1]
530~535nm
515~520nm
10nm
C
M
C 45
GaN InGaN
100mW
2_m 500_m
525.1nm
532.1nm 535.7nm
167mW 107mW 75mW
536.6nm
50mW
525~532nm 7.0
~8.9
6.4
555nm
540nm 570 nm
CIE
523nm
530~535nm
30 520~530nm
InGaN
C
CIE 523nm550nm
1931 CIE0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
520
540
0.9
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
y
x
560
580
600
620
700
380460470
480
490
500
Technologies Center
16 September 2012 www.laserfocusworld.com.cn Laser Focus World China
Hendrix Tanato Jing Hua Teng Stefan A. Maier
CW
A*STAR
IR
20
[1]
[2]
QCL MQW
- [5]
1.8THz 163K
Auston
[3]
A
B
1
FTIR
Technologies Center
17 Laser Focus World China www.laserfocusworld.com.cn September 2012
[6]
1.1THz
100nW [7]
[8]
[9]
1
- -
100nm[10] LT
GaAs
2
100nm
300nm
FTIR
2 SEM a
b
3 1THz ab
(THz)
(��)
a)
b)
1.6
102
(a.u.)
105
341 μm
255μm
2 μm2 μm
100 μm
100μm
101
100
10-1
10-2
104
103
102
1.41.21.00.80.60.40.2
5 μm
5 μm
a)
b)
1-μm LT-GaAs
10.0V/m
y
xzZ = 0
350-μm SI-GaAs (εr = 12.9)
E0 = 1 V/m
e
h
e
hE0 = 1 V/m
8.126.855.764.824.013.312.712.191.751.371.040.750.510.300.12
0
Technologies Center
18 September 2012 www.laserfocusworld.com.cn Laser Focus World China
1.3THz
FDTD Computer
Simulation Technology CST CST Microwave
Studio 1THz
3
1V/m
y
100
x
COMSOL COMSOL
Multiphysics
1/3
RC
1. E.D. Palik, J. Opt. Soc. Am., 67, 7, 857-865 (1977).
2. M. Tonouchi, Nat. Photon., 1, 97-105 (2007).
3. X.C. Zhang et al., J. Appl. Phys., 71, 326-338 (1992).
4. C. Jansen et al., Appl. Optics, 49, E48 (2010).
5. B.S. Williams, Nat. Photon., 1, 517-525 (2007).
6. S.Kumar et al., Nat. Phys., 7, 166-171 (2011).
7. M. Feiginov et al., Appl. Phys. Lett., 99, 233506 (2011).
8. E.R. Brown et al., Appl. Phys. Lett., 66, 285-287 (1995).
9. H. Tao et al., IEEE J. Select. Topics Quantum Electron., 17,
92-101 (2011).
10. H. Tanoto et al., Nat. Photon., 6, 121-126 (2012).
Hendrix Tanoto A*STAR
Jing Hua Teng
Stefan A. Maier
15
V 4.7 V
80 528.1nm
90mW
527~530nm InGaN[2] 1000
50mW
5000 70mW
2000
1. S. Takagi et al., Appl. Phys. Expr., 5, 082102 (2012).
2. K. Yanashima et al., Appl. Phys. Expr., 5, 082103 (2012).
Technologies Center
19 Laser Focus World China www.laserfocusworld.com.cn September 2012
Michel Begin Bertrand Morasse CorActive
CO2
1 m
1 m
DCOF
0.9~1.0 m
40W 2mJ
SRS
SPM [1]
MOPA
SBS
Technologies Center
20 September 2012 www.laserfocusworld.com.cn Laser Focus World China
>50 J
h c0 0
A
e a
[2-6]
1.06 m 1 20 m
0.15mJ
0.15mJ
20 m
0.35mJ
FA
/
1
CorActive DCF-YB-30/250P-FA
1 CorActive FA
1 a 30 m 20kHz 80ns 1W Q 2mJ 40Wb 17kW 915nm 73% c
(μm) (μm)
(NA)
@ 915 nm (dB/m)
DCF-YB-7/128-FHA 7 128 0.19 1.3
DCF-YB-15/28P-FA 15 128 0.13 5.5
(10 W/0.5 mJ)
DCF-YB-20/128P-FA 20 128 0.11 9
(20–30 W/1 mJ)
DCF-YB-30/250P-FA 30 250 0.11 5.5
(30–40 W/1–2 mJ)
DCF-YB-50/400P-FA 50 400 0.11 4.5
(>40 W, >2 mJ)
1W Q
a) b) 1064 nm (W)
915 nm (W)
DCF-YB-30/250P-FA 40
30
20
10
00 20 40
= 73%
60 80
c) (dB)
(nm)
-30
-40
-50
-60
-70
900 950 1000 115011001050 1200
Technologies Center
21 Laser Focus World China www.laserfocusworld.com.cn September 2012
2
3 CorActive DCF-YB-30/250P-FAM2<1.4
20kHz 80ns
1W Q 2mJ 40W
1
17kW 40kW
30 m
915nm
73%
1 40W/2mJ
NA 0.20
2 [7,8]
<0.1 dB
0.10 0.06
LMA
M2 1.4
3
1. G.P. Agrawal, Nonlinear Fiber Optics, Academic Press, San
Diego, CA (2001).
2. K.T. Vu et al., Opt. Exp., 14, 23, 10996–11001 (2006).
3. D.N. Schimpf et al., Opt. Exp., 16, 22, 17637–17646 (2008).
4. M.N. Zervas et al., "High peak power, high rep-rate pulsed
fibre laser for marking applications," Proc. SPIE, 6102,
61020Q-1 (2006).
5. F. He et al., Opt. Exp., 14, 26, 12846–12858 (2006).
6. A.E. Siegman, Lasers, University Science Books, Sausalito, CA
(1986).
7. P. Laperle et al., "Yb-Doped LMA Triple-Clad Fiber Laser,"
Proc. SPIE, 6343, 63430X-1 (2006).
8. P. Laperle et al., "Yb-Doped LMA Triple-Clad Fiber for Power
Ampli�ers," Proc. SPIE, 6453, 645308-1 (2007).
(mm)
1400
1200
1000
800
600
400
2000250 350 450
M2 <1.4
550
(μm)
A2 A1I
Technologies Center
22 September 2012 www.laserfocusworld.com.cn Laser Focus World China
Wolfgang Anderschs Rudolf Huber Daniel Mock
TruLaser Cell
7040
LLC
LLC
LLC
200 m
200 m
LLC
600
100 μm
n n1 n2
1
LLC
LLC
Technologies Center
23 Laser Focus World China www.laserfocusworld.com.cn September 2012
13
1
2
100 m 600 m
3
2
3
4 WDM 12 40
Kotura 3 m
25GHz
25G
100G
Kotura WDM 100G
10
4.4Tbit/s
2km CFP
Technologies Center
24 September 2012 www.laserfocusworld.com.cn Laser Focus World China
M1 PZT
PD1M1
M3 OP-GaAs M2
M4
PZT
90 fs at2050 nm
OPO
Nick Leindecker Konstantin Vodopyanov
OPO
OPO
OPO
OPO
QCL
OPO
OPO
OPO OPO
OPO OPO
[1]OPO
10mW
1 OPO 600mW -75 MHz 93fs M1 OPO
50mm 0.5mmOP-GaAs PZT YAG OC
Fresnel
OPO[2]
PPLN
OP-GaAs
1.5 m 2.05 m
Cr ZnSe 2.45 m
[3-5]
1 IMRA
America -
2.05 m
600mW
Technologies Center
25 Laser Focus World China www.laserfocusworld.com.cn September 2012
2
10-4
(μm)
(a.u.)
3 4 5 6
10-3
10-2
10-1
10-0T = 0
T = 1
T ( )
(μm)
(T )
3.20 3.25
101
100
10-13.30 3.35 3.40 3.45
75MHz 93fs OPO
4
M1
3~6 m
OP-GaAs0.5mm QPM OP-GaAs
4.1 m BAE
Systems
QPM 1mm
1mm 4mm QPM 60.5 m
0.5mm 8
73
GaAs <111> 4.1 m
GVD d2k/d 2 YAG
CaF2
GaAs
OPO
20mW
600mW
20
2.6~6.1 m
2
40mW
CO2
OPO
OPO
3 3.3 m
OPO
GaAs OPO 2.6~6.1 m
OH CH CO
NH
OPO /
1.F. Keilmann et al., Opt. Lett., 29, 1542 (2004).
2. A. Marandi et al., Opt. Expr., 20, 7255 (2012).
3. N. Leindecker et al., Opt. Expr., 19, 6296 (2011).
4. N. Leindecker et al., Opt. Expr., 20, 7047 (2012).
5. K. L. Vodopyanov et al., Opt. Lett., 36, 2275 (2011).
2 OPO2.6~6.1 m 4.25 m
CO2
3 3.3 m 10ppmSmithsonian Astrophysical
Observatory HITRAN
Imaging Inside
26 September 2012 www.laserfocusworld.com.cn Laser Focus World China
Jeff Hecht
Hui Cao
LED
Michael Choma
OCT
Brandon
1 a b
Redding
240nm
532nm
[1]
[2]
LED
LED
Choma
Imaging Inside
Chris Dainty
Joseph
Goodman
Goodman
[3]
1. B. Redding et al., Opt. Lett., 36, 3404
(Sept. 1, 2011).
2. B. Redding et al., Nat. Photon. (advance
online publication, (Apr. 29, 2012);
doi:10.1038/NPHOTON.2012.90.
3. J. Manni and J. Goodman, Opt. Exp.,
20, 11288 (2012).
illumia®lite
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27 Laser Focus World China www.laserfocusworld.com.cn September 2012
应用天地
28 September 2012 www.laserfocusworld.com.cn Laser Focus World China 激光世界
激光熔覆技术修复转动设备的分析与应用李永波,于恩洪,刘书宏;沈阳新松机器人自动化股份有限公司
激光熔覆技术是利用高能密度的激光束,瞬间将被加
工件表面微熔,同时使预置于零件表面或与激光束
同步送入的合金粉末完全熔化,获得与基体冶金结合的致
密覆层。该技术是最近 10 年内发展起来的应用于工业领
域中高温、高压、高转速转动设备修复的一项全新技术,
已先后赢得了石化、电力、冶金等十几个行业的认可与青
睐。截至 2011 年底,已开发的利用激光熔覆再制造技术
修复的市场规模已经接近 30 亿元。但另一方面,利用激
光熔覆再制造技术进行工业产品维修、再造的激光应用厂
商尚不足以满足当前市场的需求,特别是工业转动设备修
复市场,仍然存在着大量市场空间等待新厂商的开发进入。
激光熔覆再制造技术的特点
激光熔覆再制造是以丧失使用价值的损伤、废旧零部
件作为再制造毛坯,利用以激光熔覆技术为主的高新技术
对其进行批量化修复再生、性能升级,所获得的激光再制
造产品在技术指标、使用性能和质量方面均能达到甚至超
过新产品的水平。
其主要特点有:
1、激光熔覆层与基体为冶金结合,结合强度不低于原
基体材料的 90%。
2、基体材料在激光加工过程中仅表面微熔,微
熔层厚度为 0.05~0.1mm。基体热影响区极小,一般为
0.05~0.2mm。
3、激光加工过程中基体温升不超过 80℃,激光加工
后基本无热变形。
4、熔覆层与基体均无粗大的铸造组织,熔覆层及其
界面组织致密,晶体细小,无孔洞、夹杂、裂纹等缺陷。
5、激光熔覆层可根据具体工件的技术要求,实现梯
度功能熔覆材料的选择。
6、激光熔覆再制造技术可控性好,易于实现自动化控制。
激光熔覆
图1:典型的激光熔覆再制造金相组织照片。
熔覆层
过渡区
热影响区
基材
图 1 为一张典型的激光熔覆再制造金相组织照片,
从中可以清晰地看出激光熔覆层金相组织的四个区域,
分别为 :
(1)最底层为基材 :灰色区域,激光熔覆再制造的
基材基本包括了所有金属材料,工业领域最常用的为黑
色金属 ;
(2)第二层为热影响区:深灰色区域,化学成份与基
材相同,在激光熔覆过程中基体组织因受热发生金相变化。
原则上热影响区控制的越小越好。热影响区与基材的分界
线不是很清晰,但与过渡区的分界线却十分清晰。
(3)第三层为过渡区:浅灰色区域,化学成份受基材
与熔覆材料的双重影响,组织结构最为复杂,金相组织很
难显现出来,与热影响区和熔覆层的分界线都非常明显(下
层黑线,上层亮线)。
(4)第四层(最上层)为熔覆层:仍为浅灰色区域,
但可清晰地看出熔覆层中的枝晶结构。基化学成份完全为
熔覆材料形成的快速凝固铸态组织,特点为组织细密、晶
粒细小,枝晶生长具有明显的方向性。
工业领域转动设备现状分析
工业透平机械(又叫涡轮转动设备)是目前世界工
业领域范围通用的能
量转换或能量回收装
置,是工业企业生产
线正常运转的核心,
也可以称为国家经济
命脉的核心。机组类
型包括压缩机、风机、
汽轮机、TRT,烟气
轮机、地面燃机等。
根据机组大小的不
同,国产机组每台套
价在 100 万到几百万
元之间,进口机组每
台套价在几百万到几
千万元之间。在使用
过程中,透平机械的
转动部分如主轴颈、
汽封颈、推力盘推力
面、轮盘 / 流道 / 叶
片及键槽位,静止部分如缸体内壁、缸体中分面都是易损部位。在激光熔
覆 / 再制造技术产生之前,该类转子的维修方法主要集中在返厂更换损伤部
件。而这样的维修方法不但周期长,价格高(尤其进口设备),而且更换下
来的损坏部件无法再次利用,造成资源的极大浪费。而利用激光熔覆再制
造技术,将透平机械的损伤部位进行局部修复,则在工期、成本方面比返
厂维修节省一倍到十几倍、甚至几十倍,且维修后的产品质量达到或超过
原厂设计要求。同时,对于一台机组的同一损伤部位可进行多次修复,这
就在资源利用方面体现出更大的优势,社会价值难以估量。
上世纪 80 年代以前,国有工业企业的重大转动设备主要依靠进口。本世
纪,很多国有支柱性产业的重要转动设备都实行国产化改造,并投入到国有
经济运行体系中。随着国家经济的高速发展,在役的转动设备数量十分庞大。
仅以我国火力发电厂汽轮机为例,国内各级电厂拥有各种不同规格型号的汽
轮机组几千台,且每台汽轮机必匹配一台发电机。在我国,仅 100MW 以上
的发电机组就超过 1500 台。而发电机组中汽轮机的动静叶片、静叶环、隔板(喷
咀)、主轴颈、气封颈、推力盘、围带、铆钉及汽机缸体等部件的损伤,都具
有周期性的特点。目前,很多电厂已经采用激光熔覆再制造技术维修这些部件。
在冶金行业,利用激光再制造技术修复钢厂的转动部件、易损部件及重
载部件,已经被越来越多的钢铁企业认可并使用,无论是钢厂第一大宗消耗
品——轧辊的激光强化再制造、能量回收与转换装置 TRT 机组各部件的激光
熔覆再制造,还是热轧机牌坊的现场修复技术,都为企业带来了巨大的经济
利益和直接效益。
图3:某电厂300MW汽轮机铆钉激光再制造。
应用天地
图2:某石化公司压缩机转子汽封轴颈激光熔覆。
应用天地
30 September 2012 www.laserfocusworld.com.cn Laser Focus World China 激光世界
由于涡轮转动设备具有“周期性维修”的特点,促
使企业必须不断寻找更合理、更可靠、更快捷的技术来
解决转动设备的修复。激光熔覆技术凭借着不可替代的
技术优势,首当其冲地成为了国有工业企业修复转动设
备的首选。
激光再制造通用工艺流程如下:
产品入厂检测——部件分解——强度计算及寿命评
估 / 无损检测——损伤部位清理——着色探伤检测——损
伤部位激光熔覆再制造——损伤部位机械加工复形——机
加后检测(包括尺寸、无损等)——表面涂层处理(若需
要的话)——检测——机组回装——动平衡检测——总检
测——包装出厂
激光熔覆再制造的八大关键技术
•强度计算与寿命评估技术
•无损检测与缺陷判断技术
•故障诊断与失效分析技术
•激光熔覆专用材料制造技术
•激光加工工艺技术
•梯度功能材料技术
•机组改造与制造技术
•激光再制造涡轮动力设备企业标准
激光熔覆再制造应用案例
案例一:石化行业压缩机转子轴颈激光再制造(见图 2)
选用设备:5000W 横流 CO2 激光器
维修部位:第二级叶轮汽封颈
熔覆方式:重力送粉,螺旋式进给编程熔覆
工艺参数:功率:2500~3500W ;
扫描速度:300~600mm/min ;光斑尺寸:φ4mm ;
熔覆厚度:1mm ;搭接率:40% ;
熔覆材料:一种铁基双向不锈钢超 合金粉,熔覆后硬度:
HRC35-40
案例二:电力行业汽轮机叶片围带上铆钉的现场激光
再制造(见图 3)
作业方式:电厂现场作业
选用设备:2000W 全固态光纤输出激光器
维修部位:末级叶片围带铆钉
熔覆方式 :侧向送粉,方型块编程熔覆
工艺参数:功率:1500~1800W ;
扫描速度:450mm/min ;
光斑尺寸:φ2.5mm ;
熔覆厚度:0.8mm ;搭接率:40% ;
熔覆材料:一种适合 600℃工况的镍基高温合金粉,
熔覆后硬度:HRC25-28。
案例三:冶金行业轧辊激光强化再制造(见图 4)
作业方式:钢厂现场作业
选用设备:5000W 横流 CO2 激光器
强化位置: 轧辊工作面
强化方式 :预置涂层,螺旋式编程熔覆
工艺参数:功率:4000~4500 W ;
扫描速度:1000~1200mm/min;
光斑尺寸: φ1.8mm;
强化深度:0.8~1.2mm ;
搭接率:30% ;
涂层材料:Al2O3、TiC 等多种硬质 相混合,
强化后硬度:HRC55-62
结束语
利用激光熔覆再制造技术修复工业领域的转动设备,
已逐渐赢得了国内众多企业的青睐与好评,同时该项技术
也受到了国家各部委及各地方政府的高度重视。激光熔覆
再制造技术在石化、电力、冶金三大主导工业领域中已经
得到很好的应用,并且创造出了可观的经济效益和社会效
益。但是,由于该项技术在市场上的推广仅有大约十年的
时间,因此其在军工、机械、矿山、船舶等行业的应用还
需要更多的激光再制造厂商共同努力开发。
图4:某钢厂大型型材轧辊激光强化再制造 。
31 Laser Focus World China www.laserfocusworld.com.cn September 2012
Taewoo Kim Shamira Sridharan Gabriel Popescu
[1]
DIC[2]
QPI
[3]
[4-6]
QPI
GFM [9]GFM
GFM
GFM
4f
SLIM[7]
SLIM Zernike
Gabor
0.3nm
0.03nm[8] 40X/0.65
NA
HGPIN
1
1 100 10 10
HGPIN
32 September 2012 www.laserfocusworld.com.cn Laser Focus World China
GFM
GFMGFM
GFM
DIC
DIC
GFM
DIC 2 GFM
DIC
GFM
HGPIN
3 [10] HGPIN[11]
34BE12
p63 GFM
GFM
1. Editorial, Milestones in light microscopy, Nature Cell Biol.,
11, 1165 (2009).
2. M. Pluta, Advanced light microscopy, Polish Scientific
Publishers, Warsaw, Poland (1988).
3. G. Popescu, Quantitative phase imaging of cells and tissues,
McGraw Hill, New York, NY (2011).
4. Y.K. Park et al., Proc. Natl. Acad. Sci., 107, 15, 6731–6736
(2010).
5. H.F. Ding et al., Phys. Rev. Lett., 101, 23, 238102 (2008).
6. M. Mir et al., Proc. Natl. Acad. Sci. 108, 32, 13124–13129
(2011).
7. Z. Wang et al., J. Biomed. Opt., 16, 11, 116017 (2011).
8. Z. Wang et al., Opt. Exp., 19, 2, 1016–1026 (2011).
9. T. Kim, S. Sridharan, and G. Popescu, Opt. Exp., 20, 6, 6737–
6745 (2012).
10. J.I. Epstein and G.J. Netto, Biopsy Interpretation of the
Prostate, Lippincott Williams & Wilkins, Philadelphia, PA
(2007).
11. J.I. Epstein and M. Herawi, J. Urol., 175, 820–834 (2006).
2 a GFM b DICHeLa
GFM
3 GFM a 1 100X/1.4 NA 225 15 15
b HGPIN
33 Laser Focus World China www.laserfocusworld.com.cn September 2012
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