Experimental Researches to Establish the Optimum Hardbanding Technology and Materials of the Heavy Weight Drill PipeMihaela Madalina Caltaru, Razvan George Ripeanu, Marius Badicioiu and Dragos Gabriel ZisopolMATEC Web Conf., 318 (2020) 01017DOI: https://doi.org/10.1051/matecconf/202031801017