Ferritic-austenitic steel and its weldability in large size constructions

• Autorzy: Nowacki J.
• Języki publikacji: PL

Abstrakty

EN

Purpose: On the basis of sources and own experiments, the analysis of microstructure, properties, applications as well as material and technological problems of ferritic-austenitic steel welding were carried out. It was shown the area of welding applications, particularly welding of large-size structures, on the basis of example of the FCAW method of welding of the UNS S3 1803 duplex steel in construction of chemical cargo ships. Design/methodology/approach: Influence of selected aspects of welding technology, including welding heat input and between-bead temperature, additional materials on microstructure transitions and properties of welded joints were analysed. In the described work, experiments were conducted to welding tests for selected joints, visual examinations, non-destructive testing of welded joints, X-ray examinations, and metallographic testing of welded joints. Findings: As a result of the performed inspection, decreasing of the ferrite content with the increase of the root face gap (increase of welding heat input) was observed. The measured ferrite content was not lower than 28 %, and the maximum value did not exceed 69% (the permissible range being from 25 to 70 %). Research limitations/implications: The welding heat input exceeding the recommended values might influence the precipitation processes in the HAZ, what need further experiments. Practical implications: Application of high value of the welding heat input will be profitable in terms of the welding costs. Originality/value: An original value of the paper is to prove that a usage of high value welding heat input provides the best joints quality.

Słowa kluczowe

PL

stal duplex; spawanie; złącze spawane

EN

duplex steel; welding; welded joint

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 32, nr 2
• Strony: 115--141
• Opis fizyczny: Bibliogr. 24 poz., rys., tabl.

Twórcy

autor

Nowacki J.

• West Pomeranian University of Technology, Al. Piastów 17, 70-310 Szczecin, Poland,

Bibliografia

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