The Paton Welding Journal, 2009, №08



2009 №08 (04)

2009 №08 (06)

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TPWJ, 2009, #8, 21-26 pages  
INFLUENCE OF WELDING AND POST-WELD HEATING ON STRUCTURAL TRANSFORMATIONS AND PROPERTIES OF HAZ OF WELDED JOINTS ON HARDENING STEELS


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 8, 2009 (August)
Pages                      21-26
 
 
Authors
Yu.M. LEBEDEV
Admiral Makarov National Shipbuilding University, Nikolaev, Ukraine
 
 
Abstract
Experimental investigations of influence of welding and post-weld heating on hardness and impact toughness of simulated high-temperature areas of heat-affected zone (HAZ) of joints on low-carbon high-strength steels and medium-carbon 40Kh steel were carried out. Peculiarities of phase transformations in these steels were studied. It is determined that the most effective is fast post-weld heating of HAZ metal in a temperature interval, corresponding to intercritical interval of A_C1-A_C3.
 
 
Keywords: heat-affected zone, high-strength hardening steels, post-weld heating, diagrams of thermal-kinetic transformation of HAZ austenite, hardness, impact toughness
 
 
Received:                02.04.09
Published:               28.08.09
 
 
References
1. Lebedev, Yu.M. (1999) Influence of steel composition on formation of HAZ structure of welded joints. Avtomatich. Svarka, 11, 8-13.
2. Rykalin, N.N. (1951) Calculations of thermal processes in welding. Moscow: Mashgiz.
3. Goncharov, S.N., Gudnev, N.Z., Sterenbogen, Yu.A. et al. (1982) Effect of thermal cycle in twin-arc welding on resistance of 20KhGSNM steel to cold cracking. Avtomatich. Svarka, 7, 14-15.
4. Metelev, A.V., Gorbachev, Yu.I. (1984) Control of twin-arc welding thermal cycle of hardenable steels. Svarochn. Proizvodstvo, 4, 4-5.
5. Bursky, S.G., Dovzhenko, V.A., Sterenbogen, Yu.A. (1990) Resistance to cold cracking in HAZ of 14KhN3MDA type steel joints made by twin-arc narrow-gap welding. Avtomatich. Svarka, 2, 20-24.
6. Sidoruk, V.S., Dudko, D.A., Gorbenko, N.V. (1985) Simulation of thermal cycle in heat-affected zone during electroslag welding by modulated current. Ibid., 7, 12-15.
7. Dudko, D.A., Sidoruk, V.S., Ivashchenko, G.A. et al. (1990) Structure and hardness of HAZ metal in twin-arc welding by modulated current of steel 45. Ibid., 3, 10-12.
8. Vagner, F.A. (1980) Equipment and methods of pulse arc welding. Moscow: Energiya.
9. Savitsky, A.M., Savitsky, M.M., Novikova, D.P. (2004) Influence of welding speed and duration of periodical cooling on structure formation in welded joints of hardening steels in arc welding with thermal cycling. The Paton Welding J., 8, 39-43.
10. Kulik, V.M., Vasiliev, V.G., Grigorenko, G.M. et al. (2007) Phase and structural transformations in welding and arc treatment of 30KhGSA steel joints. Ibid., 9, 6-10.
11. Lebedev, Yu.M., Kravchenko, L.P., Danilyuk, N.M. (1978) Procedure of modeling of welding thermodeformation cycles. Avtomatich. Svarka, 12, 31-33.
12. Lebedev, Yu.M., Lazarev, V.N., Klejner, L.M. et al. (1989) Examination of weldability of low-carbon martensitic steel 07Kh3GNM. Ibid., 9, 1-4.

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