MANUFACTURE OF AS-ROLLED HIGH STRENGTH BOLTS USING HOT ROLLED AND CONTROL-COOLED DUAL-PHASE WIRE RODS

摘要

This paper describes briefly the manufacture process of as-rolled high strength bolts which are produced from low carbon Mn-Si hot rolled and control-cooled dual-phase wire rods. The main points include: a) characteristics of dual-phase wire rod after hot rolling and controlled cooling, b) cold drawn characteristics of dual-phase wire rods, c)aging characteristics of cold upsetting high strength bolts, d)results and benefit of cold upsetting as-rolled high strength bolts.