| 2007 №07 (07) | 2007 №07 (09) |
The Paton Welding Journal, 2007, #7, 30-34 pages
Effect of structural-phase state of high-strength weld metal on properties of welded joints in hardening steels
E.L. Demchenko, D.V. Vasiliev
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
It is established that the high-strength (st ³ 1000 MPa) austenitic-martensitic weld metal has a positive effect on the kinetics of formation of structure and properties of HAZ of the welded joints in alloyed steels made without preheating and postweld heat treatment. Offered is the composition for the high-strength weld metal using flux-cored wire welding, which provides high cold crack and delayed fracture resistance of the welded joints.
Keywords: arc welding, hardening steels, welded joints, high-strength steels, HAZ metal, structure, welding consumables
References
1. (1974) Technology of fusion electric welding of metals and alloys. Ed. by B.E. Paton. Moscow: Mashinostroenie.2. Makarov, E.L. (1981) Cold cracks in welding of alloyed steels. Moscow: Mashinostroenie.
3. Makara, A.M., Mosendz, N.A. (1971) Welding of highstrength steels. Kiev: Tekhnika. 4. Gotalsky, Yu.N. (1992) Welding of pearlitic steels with austenitic consumables. Kiev: Naukova Dumka.
5. Grishchenko, L.V. (1961) New electrodes for welding of steel 15Kh2N4MDA. Svarochn. Proizvodstvo, 3, 22–26.
6. Barishnikov, A.P. (1969) Influence of weld metal composition on cold crack formation in welding of medium-alloy steels. Avtomatich. Svarka, 7, 1–4.
7. Birman, S.R. (1974) Sparsely-alloyed maraging steels. Moscow: Metallurgiya.
8. Gotalsky, Yu.N., Snisar, V.V., Demchenko, E.L. Method of arc welding of hardening steels. USSR author’s cert. 880671. Int. Cl. B23K 28/00. Publ. 14.07.81.
9. Goldshtejn, M.I., Grachev, S.V., Veksler, Yu.G. (1985) Special steels. Moscow: Metallurgiya.
10. Goudremont, E. (1966) Special steels. Moscow: Metallurgiya.
11. Potak, Ya.M. (1972) High-strength steels. Moscow: Metallurgiya.
12. Kozlovskaya, V.I., Potak, Ya.M., Orzhekhovsky, Yu.F. (1969) Increase of toughness of martensitic steels by heat treatment. Metallovedenie i Term. Obrab. Metallov, 5, 61–66.
13. Tikhomirov, V.V., Shakhnazarov, Yu.V., Pankov, A.G. et al. (1971) Relationship between toughness of steel N18K9N5T at -196 °C and amount and stability of retained austenite in fracture. Fizika Metallov i Metallovedenie, 32(3), 641–643.
14. Nikolskaya, V.L., Pevzner, L.M., Orekhov, N.G. (1975) Influence of retained austenite on properties of cast stainless steels. Metallovedenie i Term. Obrab. Metallov, 9, 35–39.
15. Yushchenko, K.A., Pustovit, A.I. (1977) Influence of alloying elements on structure and cold resistance of highstrength maraging welds. In: Steels and alloys for cryogenic engineering. Kiev: Naukova Dumka.
16. Demchenko, E.L., Bovsunovsky, A.N., Yankina, O.I. (1990) Effect of hydrogen on mechanical properties of austenitic-martensitic weld metal of the 03Kh12N8M2GST type. Avtomatich. Svarka, 7, 30–33.
17. Demchenko, E.L., Snisar, V.V., Lipodaev, V.N. (1991) Ways of decreasing hydrogen content in weld metal of the 03Kh12N8M2GST type in arc welding. Ibid., 10, 23–27.
18. Sterenbogen, Yu.A., Vasiliev, D.V., Demchenko, E.L. et al. (2006) Role of peak stresses in formation of cold cracks in welded joints of hardenable steels. The Paton Welding J., 4, 9--16.
