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The influence of TIG welding technology on the properties and quality of joints made of dissimilar steels

100%

Wieczorska A. , Dyl T.

tom nr 124

20--30

The paper presents a new technology for welding dissimilar steels using the TIG method. Following the welding, the joint was subjected to non-destructive testing, and subsequently a Vickers hardness measurement. The tests were intended to determine whether the newly developed welding technology was properly prepared and if such joints were feasible. This particularly applies to dissimilar materials joined by welding.

Evaluation of high-temperature corrosion on 13CrMo4-5 steel operated in the power industry

88%

Gwoździk M.

tom nr 21(4)

335--343

The paper presents results of studies of steel and the oxide layer formed during a long-term operation (t=130,000h) on 13CrMo4-5 steel at an elevated temperature (T=455°C). The oxide layer was studied on a surface and a cross-section at the inner site of the pipe (in the flowing medium – steam side). The paper contains results of studies such as: light microscopy, scanning electron microscopy, X-ray phase analysis.

Residual Life of Boiler Pressure Parts Made of the 13CrMo4-5 Steel after Long-Term Operation in a Creep Conditions

88%

Dziuba-Kałuża M. , Zieliński A. , Dobrzański J. , Sroka M. , Urbańczyk P. , Śliwa A.

Archives of Metallurgy and Materials

2018

tom Vol. 63, iss. 2

889--897

This paper presents the method for determination of the time of further safe service for welded joints of boiler components after exceeding the design work time. The evaluation of the life of the parent material and its welded joints was performed. Microstructure investigations using a scanning electron microscope, investigations of strength properties, impact testing, hardness measurements and abridged creep tests of the basic material and welded joints were carried out. The investigations described in this paper allowed the time of further safe service of the examined components made of 13CrMo4-5 steel to be determined. The method for determination of the time of safe service of boiler components working under creep conditions allows their operation beyond the design service life. The obtained results of investigations are part of the materials database developed by the Institute for Ferrous Metallurgy.

Residual Life of Boiler Pressure Parts Made of the 13CrMo4-5 Steel after Long-Term Operation in a Creep Conditions

75%

Zieliński A. , Dziuba-Kałuża M. , Dobrzański J. , Sroka M. , Urbańczyk P. , Śliwa A.