Study of Welding Wire Nanocoated With Lanthanum Boride for S960 High-Strength Steel Welding
- Pavel Layus (Lappeenranta University of Technology) | Paul Kah (Lappeenranta University of Technology) | Sergey Parshin (Peter the Great St. Petersburg Polytechnic University) | Vitaly Dmitriev (Peter the Great St. Petersburg Polytechnic University) | Eric Mvola Belinga (Lappeenranta University of Technology)
- Document ID
- International Society of Offshore and Polar Engineers
- The 28th International Ocean and Polar Engineering Conference, 10-15 June, Sapporo, Japan
- Publication Date
- Document Type
- Conference Paper
- 2018. International Society of Offshore and Polar Engineers
- nanocoated welding wire, gmaw, boron, lanthanum, high strength steels
- 0 in the last 30 days
- 15 since 2007
- Show more detail
Development of innovative consumables for GMAW could bring sufficient improvements in the weld quality. LaB6 (Lanthanum Boride) is a compound of rare earth metal element Lanthanum and nonmetal element Boron. LaB6 has an excellent electrical conductivity, high melting point, considerable strength, and high hardness. Nanoparticles added to the surface of the flux cored wire can improve the stability of the arc and the nanoparticles are eventually transported into the weld pool to improve its properties. Currently, LaB6 finds its application only in the electron beam welding process. Current work proposes the application of nanocoated lanthanum boride welding wire for GMAW of S960QC steel plate of 5 mm thickness. The study compares conventional welding wire Union X96 without the coating and with nanocoating, which was made by electrolysis. The analysis of welding results was conducted and tensile strength, impact test, hardness test, and macrostructure evaluation were performed. Experiments show that the arc stability is affected by introducing nanoparticles, voltage changes within 7 volts range, and current changes within 50 amperes. Hardness tests show an increase in hardness in the weld, and it gradually reduces at the fusion line. The results of this work can be useful for academia, as it provides explanations of nanoparticles effects on the welds; and to filler wire manufacturers, as it provides a novel idea on a nanocoating modification for conventional welding wire.
The recent rapid development of nanotechnology has shown significant benefits in various applications, especially in the field of mechanical engineering. A large amount of scientific research has been carried out in recent years, and the interest towards this field is increasing. Nanotechnology plays a key role in the development of the field of mechanical engineering and finds many applications, such as improving and adding new properties to materials and manufacturing processes, such as the development of lightweight and high-strength materials (National Nanotechnology Initiative, 2017). Figure 1 shows the number of scientific papers published on the topic of nanotechnology in the field of engineering over recent years. It can be seen that currently about 25000 scientific papers are published annually, which clearly indicates the strong research interest to this field.
|File Size||2 MB||Number of Pages||8|