Mechanical characteristics of welded joints between different stainless steels grades

5th ModTech International Conference - Modern Technologies in Industrial Engineering

Topolska, S.^1 ; Labanowski, J.^2

Silesian University of Technology, Faculty of Mechanical Engineering, Institute of Engineering Materials and Biomaterials, Konarskiego 18A, Gliwice

44-100, Poland^1

Gdask University of Technology, Faculty of Mechanical Engineering, Department of Materials and Welding Engineering, G. Narutowicza 11/12, Gdask

80-233, Poland^2

关键词: Corrosion-resistant;    Corrosion-resistant steel;    Functional properties;    General corrosion;    High mechanical properties;    Maritime constructions;    Mechanical characteristics;    Stress corrosion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/227/1/012131/pdf
DOI  :  10.1088/1757-899X/227/1/012131

来源: IOP

【 摘 要 】

Investigation of mechanical characteristics of welded joints is one of the most important tasks that allow determining their functional properties. Due to the very high, still rising, cost of some stainless steels it is justified, on economic grounds, welding austenitic stainless steel with steels that are corrosion-resistant like duplex ones. According to forecasts the price of corrosion resistant steels stil can increase by 26 30%. For technical reasons welded joints require appropriate mechanical properties such as: tensile strength, bending, ductility, toughness, and resistance to aggressive media. Such joints are applied in the construction of chemical tankers, apparatus and chemical plants and power steam stations. Using the proper binder makes possible the welds directly between the elements of austenitic stainless steels and duplex ones. It causes that such joits behave satisfactorily in service in such areas like maritime constructions and steam and chemical plants. These steels have high mechanical properties such as: the yield strength, the tensile strength and the ductility as well as the resistance to general corrosion media. They are resistant to both pitting and stress corrosions. The relatively low cost of production of duplex steels, in comparison with standard austenitic steels, is inter alia, the result of a reduced amount of scarce and expensive Nickel, which is seen as a further advantage of these steels.