| 2004 №03 (03) | 2004 №03 (05) |
The Paton Welding Journal, 2004, #3, 21-25 pages
Effect of modifying of weld metal on delayed fracture resistance of high-strength steel welded joints
V.I. Kabatsky, A.V. Kabatsky
Donbass State Machine-Building Academy, Kramatorsk, UkraineAbstract
It is shown that at a complex modifying of 10KhGNM type weld metal with nitrogen and vanadium, in combination with cerium, it is possible to obtain the most stable resistance of welded joints, made from martensitic steel 33KhSN2MA, against the cold cracking. This promotes the favourable change in structure and morphology of non-metallic inclusions in metal of the fusion zone of joints.
Keywords: high-strength steels, low-alloy welds, cold cracks, fusion zone, modifying, nitrides, surface-active elements, ratio, investigations
References
1. Makarov, E.L. (1981) Cold cracks in welding of alloy steels. Moscow: Mashinostroenie.2. Kasatkin, B.S. (1991) Micromechanism of cold cracking in welding of medium-alloy steels. In: Proc, of Seminar on Metallurgical Requirements of Manufacturers and Customers on Weldability of Steels, Kiev, Sept. 16−20, 1991.
3. Zemzin, V.N., Chizhik, A.A., Lanin, A.A. et al. (1983) Conditions of cracking in welding and heat treatment. Part 1. About the role of creep in cracking. Svarochn. Proizvodstvo, 11, 1−4.
4. Sterenbogen, Yu.A. (1986) Some factors determining the HAZ metal resistance of martensitic steels to cold cracking. Avtomatich. Svarka, 6, 5−8.
5. Zolotorevsky, S.M. (1983) Mechanical properties of metals. Moscow: Metallurgiya.
6. Kabatsky, V.I., Podgaetsky, V.V., Novikova, D.P. et al. (1988) Structure and properties of heat-affected zone of welded joints from high-strength steel of martensitic class. Avtomatich. Svarka, 1, 16−20.
7. Kabatsky, A.V. (1998) Low-alloy electrode materials for welding of hardening steels. Vestnik Priazov. GTU. Issue 6.
8. Novikova, D.P. (1989) High-temperature metallography of welded joints. Kiev: Naukova Dumka.
9. Novikova, D.P., Bogachek, Yu.L., Mandelberg, S.L. et al. (1973) Interaction of microstructure with impact strength of weld metal on tube low-alloy steel. Avtomatich. Svarka, 8, 6-9.
10. Grabin, V.F., Denisenko, A.V. (1978) Physical metallurgy of welding of lowand medium-alloy steels. Kiev: Naukova Dumka.
11. Kabatsky, V.I., Kiriakov, V.M., Podgaetsky, V.V. et al. (1985) Resistance of welded joints of 25KhGM type steel to cold cracking in fusion zone during calcium alloying of weld metal. Avtomatich. Svarka, 1, 5−7.
12. Kiriakov, V.M., Parfesso, G.I., Podgaetsky, V.V. et al. (1989) Influence of sulfide inclusions in fusion zone of austenitic welds with pearlitic steel on susceptibility of joints to cracks-tears formation. Ibid., 10, 4−7.
13. Braun, M.P. (1982) Microalloy steels. Kiev: Naukova Dumka.