Investigation of process stability and weld quality of underwater wet flux-cored arc welding of low-alloy high-strength steel with oxy-rutile wire

• Autorzy: Li Hongliang , Liu Shixiong , Ma Qiang , Wang Pengfei , Liu Duo , Zhu Qiang

Identyfikatory

DOI

10.2478/pomr-2021-37

• Języki publikacji: EN

Abstrakty

EN

The paper described the experimental findings of underwater wet welding of E40 steel using self-shielded flux-cored wire with a TiO2 -FeO-MnO slag system. The arc stability, weld quality and corrosion resistance with different heat inputs were studied. The results showed that the wet welding process of the designed wire displayed good operability in the range of investigated parameters. The microstructure and mechanical properties of the weld metal depended on the heat input. Due to the high fraction of acicular ferrite in the weld metal, the mechanical properties of the weld metal under low heat input had better tensile strength and impact toughness. Fracture morphologies at low heat input had uniform and small dimples, which exhibited a ductile characteristic. The diffusible hydrogen content in the deposited metal obtained at a heat input of 26 kJ/cm significantly reduced to 14.6 ml/100g due to the combined effects of Fe2 O3 addition and the slow solidification rate of molten metal. The microstructure also had a significant effect on the corrosion resistance of the weld metal. The weld metal with high proportions of acicular ferrite at low heat input exhibited the lowest corrosion rate, while the base metal possessed a reduced corrosion resistance. These results were helpful to promote the application of low alloy high strength steel in the marine fields.

Słowa kluczowe

EN

arc stability; weld quality; low alloy high-strength steel; underwater wet welding

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2021
• Tom: nr 3
• Strony: 100--109
• Opis fizyczny: Bibliogr. 36 poz., rys., tab.

Twórcy

autor

Li Hongliang

• Jiangsu University 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013 ZhenJiang
• Harbin Institute of Technology 92 Xi Da Zhi Jie, Nangang Qu, Harbin 150001 Harbin China

autor

Liu Shixiong

• Jiangsu University 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013 ZhenJiang China

autor

Ma Qiang

• Jiangsu University 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013 ZhenJiang China

autor

Wang Pengfei

• Peter the Great St. Petersburg Polytechnic University St. Petersburg, Polytechnicheskaya, 29 195251 St. Petersburg Russia

autor

Liu Duo

• Harbin Institute of Technology 92 Xi Da Zhi Jie, Nangang Qu, Harbin 150001 Harbin China

autor

Zhu Qiang

• Jiangsu University 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013 ZhenJiang China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).