The Paton Welding Journal, 2013, №06



2013 №06 (03)

2013 №06 (05)

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The Paton Welding Journal, 2013, #6, 23-27 pages  

APPLICATION OF INDUCTION HEAT TREATMENT TO PROVIDE CORROSION RESISTANCE OF STAINLESS STEEL WELDED PIPES

E.A. PANTELEJMONOV and L.I. NYRKOVA

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
The effect of induction heat treatment using currents with a frequency of 2.4 kHz on corrosion resistance of Ø85.6 × 0.6 and 142.9 × 0.9 mm welded pipes, made from chrome-nickel stainless steel 1.4301, at different proportions of heat treatment temperatures, heating rate, time of holding at the heat treatment temperature and cooling conditions was investigated. The use was made of specimens of the pipes after heating in single-turn inductors, as well as specimens of the long pipes that passed under current the entire length of the through-type multiple-turn inductors. The heat treatment parameters were chosen on the basis of their possible implementation in lines for production of thin-walled welded pipes at welding speeds of up to 0.063 m/s. It was shown that the heat treatment of the welded pipes in a temperature range of 700-770°C, at heating rates of up to 47.7 °C/s and cooling rates of up to 12.5 °C/s leads to improvement of their corrosion cracking resistance, and does not deteriorate their intercrystalline and pitting corrosion resistance. 10 Ref., 1 Table, 4 Figures.
 
 
Keywords: welded pipes, corrosion-resistant steel, heat treatment of pipes, corrosion cracking
 
 
Received:                01.04.13
Published:               28.06.13
 
 
References
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