Borts B.V., Nekhlyudov I.M., Rybalchenko N.D., Sytin V.I., Vorobjov I.A.Improvement Of The Technology Of Producing Extended Composite Transition Pieces Of Steel 20 — Steel 08kh18n10t Made By The Method Of Hot Screw Rolling In Vacuum (The Paton Welding Journal, 2017, №12)