Weldability of Underwater Wet-Welded HSLA Steel: Effects of Electrode Hydrophobic Coatings

Materials

Jacek Tomków¹ 

[1] Division of Welding Engineering, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gabriel Narutowicza 11/12, 80-233 Gdańsk, Poland;

关键词: high-strength low-alloy steel;    underwater welding;    wet welding;    weldability;    hydrophobic coating;   

DOI  :  10.3390/ma14061364

来源: DOAJ

【 摘 要 】

The paper presents the effects of waterproof coatings use to cover electrodes on the weldability of high-strength, low-alloy (HSLA) steel in water. With the aim of improving the weldability of S460N HSLA steel in water, modifications of welding filler material were chosen. The surfaces of electrodes were covered by different hydrophobic substances. The aim of the controlled thermal severity (CTS) test was to check the influence of these substances on the HSLA steel weldability in the wet welding conditions. The visual test, metallographic tests, and hardness Vickers HV10 measurements were performed during investigations. The results proved that hydrophobic coatings can reduce the hardness of welded joints in the heat-affected zone by 40–50 HV10. Additionally, the number of cold cracks can be significantly reduced by application of waterproof coatings on the filler material. The obtained results showed that electrode hydrophobic coatings can be used to improve the weldability of HSLA steel in underwater conditions.

【 授权许可】

Unknown