Forge welding method for steel material

Abstract

Abstract PURPOSE:To heighten cleanness of a faying surface and obtain joining strength equal to base metal at the time of forge welding of steel materials by welding and sealing up outer periphery of joined face of steel materials of the same kind or different kind to be forge welded, and after heating the sealed joined face by hydrogen atmosphere and hot forging. CONSTITUTION:Pipes 4, 5 for supplying and discharging H2 gas are welded at outer periphral position of a joined face of steel material 2, and after superposing the joined face of steel material on it, outer periphery of the joined face 3 of steel material is welded and sealed. Then, after keeping the welded face 3 in H2 gas atmosphere by letting flow H2 gas from the pipe 4 and discharging from the pipe 5, steel materials 1, 2 are heated to about 900 deg. C in a furnace to clean the joined face 3. When the joined face 3 is cleaned sufficiently, steel materials 1, 2 are heated to about 1000-1300 deg. C and forged in a temperature range of 1300 800 deg. C. Thus, joining strength of the forge welded part can be heightened to capacity equivalent to the base metal.

Inventors

• 👤 Kiyoshi Uchida
• 👤 清 内田
• 👤 Yoshihiro Kataoka
• 👤 片岡　義弘
• 👤 Noriaki Koshizuka
• 👤 腰塚　典明

Bibliographic Details