The Paton Welding Journal, 2007, №10

2007 №10 (04)

2007 №10 (06)

---

The Paton Welding Journal, 2007, #10, 28-32 pages

Argon-arc welding of billets of shafts for metallurgical equipment

V.M. Kulik, M.M. Savitsky, A.F. Lupan, L.A. Chertorylsky, V.E. Sukhoyarsky

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Peculiarities of argon-arc tungsten-electrode welding of shaft billets are considered. Application of an activating flux (A-TIG) welding makes it possible to decrease the depth of the weld groove, which is them filled up with filler metal during the TIG process. It is shown that thermal cycling and auto-heating in multilayer welding lead to decrease in the cooling rate, formation of more equilibrium structures, and prevention of cold cracking. In as-welded condition the joint metal has increased hardness and microhardness compared to base metal, and after comprehensive heat treatment the welded joint has the properties close to those of the base metal.
Keywords: argon-arc welding, shaft billets, low-alloyed steels, circumferential butt joint, penetration, weld, HAZ, cooling rate, structure, joint properties

References

1. Samokhatsky, A.I. (1962) Technology of heat treatment of metals. Moscow: Mashgiz.
2. Savitsky, M.M., Sterenbogen, Yu.A., Lupan, A.F. et al. (1990) Technology of argon-arc welding of electrodrill cases of 40Kh steel. Avtomatich. Svarka, 5, 45–48.
3. Kulik, V.M., Savitsky, M.M., Lupan, A.F. et al. (1995) Recovery of high-strength steel rotors. Ibid., 5, 52–54.
4. (1990) Strength of welded joints under alternating loads. Ed. by V.I. Trufyakov. Kiev: Naukova Dumka.
5. Ostash, O.P., Kupovsky, A.V., Lazko, V.E. et al. (1990) Cyclic crack resistance of high-strength steel welded joints. Avtomatich. Svarka, 7, 8–12.
6. Savytsky, M.M., Kulyk, V.M., Lupan, A.P. et al. Method of shielded-gas welding of metals and alloys. Pat. 55385 Ukraine. Publ. 2003.
7. Kulyk, V.M., Savytsky, M.M., Lupan, A.P. et al. Method of two-pass arc welding of circular pipe butt joint. Pat. 74936 Ukraine. Publ. 2006.
8. (1970) Theoretical principles of welding. Ed. by V.V. Frolov. Moscow: Vysshaya Shkola.
9. Popov, A.A., Popova, L.E. (1965) Isothermal and thermokinetic diagrams of overcooled austenite decomposition: Refer. Book. Moscow: Metallurgiya.
10. Kulik, V.M., Vasiliev, V.G. (2006) Variations in structure and properties of HAZ metal in welded joints on steel 30KhGSA in arc treatment. The Paton Welding J., 7, 16–21.
11. Kulik, V.M., Vasiliev, V.G., Grigorenko, G.M. et al. (2007) Phase and structural transformations in welding and arc treatment of 30KhGSA steel welded joints. Ibid., 9, 6–10.
12. Makarov, E.L. (1981) Cold cracks in welding of alloy steels. Moscow: Mashinostroenie.

---

Suggested Citation

V.M. Kulik, M.M. Savitsky, A.F. Lupan, L.A. Chertorylsky, V.E. Sukhoyarsky (2007) Argon-arc welding of billets of shafts for metallurgical equipment. The Paton Welding J., 10, 28-32.

---