Structural strength of welded joints in blast furnace jackets

• Published in: Welding international 2003-01, Vol.17 (4), p.318-320
• Main Authors: Danilov, V I, Zuev, L B, Gagauz, V P, Gromov, V E, Tsellermaer, V Ya
• Format: Article
• Language: English
• ISSN: 0950-7116; 1754-2138
• DOI: 10.1533/wint.2003.3124

The jackets of blast furnaces are thick-plated welded structures designed for a long service life. Usually, they are produced from low-carbon, low-alloy steel 09G2S. In service, most damage is recorded in welded joints and a decrease in the level of reliability of these joints is not acceptable. In this work, investigations were carried out into changes in the quality of welded joints in blast furnace jackets in order to explain the main factors determining the service reliability of these joints. Investigations were carried out into the strength properties and structure of welded joints in blast furnace jackets made of steel 09G2S at the Kuznetsk Metallurgical Works, depending on the welding method and service time. All the joints were produced with Sv-08G2S wire, by butt welding without preheating. The gap between the components was 30 mm. Welding was carried out in A-820K automatic equipment, power source VST-1601 or VDU-1201. Electroslag welding was carried out using AN-8 wire.]