TPWJ, 2013, #7, 58-60pages
PECULIARITIES OF EXPLOSION WELDING OF STEEL WITH CAST IRON
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue № 7, 2013 (July)
I.V. DENISOV and L.B. PERVUKHIN
Institute of Structural Macrokinetics and Materials Science, RAS. 8 Acad. Osipyan Str., 142432, Chernogolovka, RF. E-mail: email@example.com
Products of cast iron find a wide spreading in modern machine building, in particular for manufacture of friction discs, in which the plates of cast iron are fastened by bolts to steel or copper plates. According to hypothesis about formation of impact-compressed gas (ICG) and its thermal ionization at the interface with the formation of thin layers of low-temperature («cold») plasma in a welding gap during explosion welding, the conditions of formation of carbon steel-low-alloy cast iron joint were determined. Conditions of explosion welding and heat treatment were set for producing full-strength joint and prevention of defects in the form of cracks and spallings along the entire line of contact between the steel and cast iron. The carried out evaluation calculations of parameters of ICG with account for super-speed flowing of surface being welded by it showed that change in rate of contact spot from 2400 up to 4000 m/s leads to increase in temperature and decrease of length of ICG region, as well as time of plasma effect. 6 Ref., 1 Table, 1 Figure.
explosion welding, welding gap, impact-compressed gas, gas parameters, cleaning, contact spot
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