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2649 |
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Wednesday, September 28, 2011, Saal E 11:50 AM Verfahrenstechnik und Anwendungen |
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Welding of stainless steels under water |
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Sergey Maksimov / E.O.Paton Electric Welding Institute, Ukraine Konstantin Yushchenko / E.O.Paton Electric Welding Institute, Ukraine Nikolay Kakhovskiy*/ E.O.Paton Electric Welding Institute, Ukraine Galina Fadeeva/ E.O.Paton Electric Welding Institute, Ukraine Sergey Suprun/ E.O.Paton Electric Welding Institute, Ukraine |
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Repair of elements of nuclear power plants constructions is attended with the risk of radioactive irradiation of personnel. The use of water as a physical barrier against a radiation allows to increase possible time of performing of works. It does perspective development of materials for the wet underwater welding of stainless steels. Based on long-term experience of application of the mechanized flux-cored wire welding in the E.O.Paton Electric Welding Institute a selfshealding flux-cored wire is worked out for wet welding of stainless steels. It allows to perform welding of butt, fillet and overlapped joints in flat and vertical positions of high-alloy corrosion-resistant steels type of AISI 304L, 308L, 347 and 321. Mechanical properties of weld metal meet to the requirements, specified to the welds, performed on air: tensile strength - ³ 550 MPa, elongation - ³ 22%, Charpy V-notch value - ³ 70 J/cm2. Application of the flux-cored wire opens the prospect of automation of welding process and exception participating of man in works in extrahazardous conditions. |