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Abstract

Laser welding with a powder feed has been investigated using a 3·0 kW CO₂ laser system. This type of welding is a modification of autogenous laser welding. In the present investigation, a straight thin tube nozzle was used to deliver powder to the welding area by a computerised powder feeder. The delivered powder is melted and mixed by interaction with the laser beam to form a weld with the base metal. This technique can extend the capabilities of autogenous laser welding while retaining many of its advantages. A series of welding parameters was used to produce butt joints with a satisfactory weld bead profile at various joint gap sizes. The main objective of the present study was to use a power feed to accommodate joint gaps which often present problems in autogenous laser welding. Promising results have been obtained. A joint gap of up to 1·0 mm has been welded successfully in 3·0 mm thickness steel: a great improvement compared with autogenous laser welding. In the present study, weld microstructure, composition, hardness, and tensile properties were investigated. The investigation indicated that the joints possess sufficient strength. The practical implication of the results is that tight fitup requirements for laser welding can be relaxed somewhat for many demanding industrial applications. Although further development is still required to optimise the technique, its potential has been demonstrated.

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References

Uddin

M. N.

: Ind. Laser Rev., 1991, 6, (7), 11–14.

Forbis-Parrott

C. A.

: Weld. J., 1991, 70, (7), 37–42.

Riches

S. T.

: Weld. Met. Fabr., March 1993, 79–83.

Dipietro

F. A.

: Proc. Conf. Icaleo ’93, Orlando, FL, USA, October 1993, SPIE Proceedings Series, Vol. 2306, 471–476; 1993, Bellingham, WA, Society of Photo–Optical Instrumentation Engineers.

Ream

S. L.

: Ind. Laser Rev., 1995, 10, (5), 21–23.

Lewinski

: Ind. Laser Rev., 1995, 10, (7), 5–8.

Watson

M. N.

: ‘Laser welding of structural steel with wire feed’, TWI Research Report No. 264, The Welding Institute, Cambridge, 1985.

Arata

, Maruo

, Miyamoto

, and Nishio

: Trans. JWRI, 1986, 15, (2), 199–206.

Atsuta

, Yasuda

, and Okita

: Proc. 4th Int. Conf. on Welding and Melting by Electron and Laser Beams, Cannes, France, September 1988, Institut de Soudure/The Welding Institute.

10.

Dilthey

, Schneegans

, Hendricks

, and Panten

: Proc. 2nd Int. Conf. on Power Beam Technology, Stratford upon Avon, UK, September 1990, (ed. J. D. Russell), 69–78; 1991, Cambridge, Woodhead Publishing/The Welding Institute.

11.

Binroth

C. A.

, Zou

T. C.

, and Sepold

: Proc. 2nd Int. Conf. on Power Beam Technology, Stratford upon Avon, UK, September 1990, (ed. J. D. Russell), 119–127; 1991, Cambridge, Woodhead Publishing/The Welding Institute.

12.

Hall

B. E.

and Wallach

E. R.

: Proc. Int. Conf. ‘Advances in joining and cutting processes’, Harrogate, UK, October– November 1989, 219–230; 1990, Cambridge, Abington Publishing.

13.

Hill

, Megaw

J. H. P. C.

, Aitchinson

, and Aubrey

J. H.

: Proc. 2nd Int. Conf. on Power Beam Technology, Stratford upon Avon, UK, September 1990, (ed. J. D. Russell), 108–118; 1991, Cambridge, Woodhead Publishing/The Welding Institute.

14.

Salminen

A. S.

and Moisio

: Proc. 3rd Int. Conf. on Beam Technology, DVS 135, 196–200; 1991, Düsseldorf, Germany, Deutscher Verlag für Schweisstechnik.

15.

Dilthey

, Hendricks

, Huwer

, Jacobskötter

, and Schneegans

: Proc. 3rd Int. Conf. on Beam Technology, DVS 135, 71–74; 1991, Düsseldorf, Germany, Deutscher Verlag für Schweisstechnik.

16.

Phillips

R. H.

and Metzbower

E. A.

: Weld. J. Res. (Suppl.), 1992, 73, (6), 201s–208s.

17.

Sun

and Moisio

: Mater. Sci. Technol, 1993, 9, (7), 603–608.

18.

Nielsen

S. E.

, Hansen

L. E.

, and Kristensen

J. K.

: Proc. 5th Int. Conf. on Welding and Melting by Electron and Laser Beams, La Baule, France, June 1993, Institut de Soudure/The Welding Institute, Vol. 1, 203–210.

19.

Jones

I. A.

: Proc. 5th Int. Conf. on Welding and Melting by Electron and Laser Beams, La Baule, France, June 1993, Institut de Soudure/The Welding Institute, Vol. 1, 195–201.

20.

Dilthey

and Schneegans

: Weld. Cutting, 1994, 46, (3), E40–E42.

21.

A. s. Salminen, v. Kujanpää

, and Moisio

T. J. I.

: Proc. Int. Conf. Icaleo ’94, Orlando, FL, USA, October 1994, Laser Institute of America.

22.

Roman

J. M.

, Kechemair

, and Ricaud

J. P.

: Weld. Int., 1994, 8, (5), 376–379.

23.

Metzbower

E. A.

, Bhadeshia

H. K. D. H.

, and Phillips

R. H.

: Mater. Sci. Technol., 1994, 10, (1), 56–59.

24.

Jones

: ‘Lasers make advances in welding of automotive aluminium alloys’, TWI Bulletin 2, The Welding Institute, Cambridge, 1995.

25.

Salminen

A. S.

, Kujanpää

V. P.

, and Moisio

: Weld. J. Res. (Suppl.), 1996, 75, (1), 9s–13s.

26.

Sun

and Salminen

A. S.

: Mater. Manuf. Process., 1997, 12, (5), 759–777.

27.

Nilsson

and Sarady

: Proc. Int. Conf. ‘Lasers in manufacturing’, Bedford, UK, May 1987, IFS Conferences, 75–83.

28.

Boiler

ASME

and Pressure Vessel Code Section IX, American Society of Mechanical Engineers, New York, NY, 1986.

29.

Kuo

, Sun

, and Pan

: ‘Laser welding of thin sheet materials’, Report C96-P-034A, Gintic Institute of Manufacturing Technology, Singapore, 1997.

30.

Schaeffler

A. L.

: Met. Progr., 1949, 56, (5), 680–680B.

31.

Katayama

and Matsunawa

: Proc. Conf. Icaleo ’84, Boston, MA, USA, 1984, Laser Institute of America, 60–67.

32.

David

S. A.

, Vitek

J. M.

, And

T. L

. Hebble: Weld. J. Res. (Suppl), 1987, 66, (10), 289s–300s.

33.

Nakao

, Nishimoto

, and Zhang

W. P.

: Trans. Jpn Weld. Soc., 1988, 19, (2), 20–26.

34.

Elmer

J. W.

, Eagar

T. W.

, and Allen

S. M.

: Proc. Materials Weldability Symp., (ed. R. A. Patterson and K. W. Mahin), 143–150; 1990, Materials Park, OH, ASM International.

35.

Krauss

: ‘Principles of heat treatment of steel’, 129; 1978, Materials Park, OH, ASM International.

36.

Sun

and Moisio

: Weld. J., 1994, 73, (4), 63–69.

37.

Sun

and Kuo

: ‘Laser welding with fillers’, Report C96-P-013A, Gintic Institute of Manufacturing Technology, Singapore, January 1997.

38.

‘Properties and selection: irons, steels, and high-performance alloys’, ASM Handbook, Vol. 1, 10th edn; 1990, Materials Park, OH, ASM International.

Laser welding with powder feed

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