| 摘要 |
PURPOSE: A method for manufacturing a large driving gear for a rolling roll in steel making equipment is provided to reduce the costs for raw materials by replacing a forging gear with a welding gear. CONSTITUTION: A method for manufacturing a large driving gear for a rolling roll in steel making equipment comprises the steps of: forging and processing a raw material, shrink-fitting the roughed material, welding the shrunken material, removing stress from the welded material through heat treatment, inspecting the welded material, quenching and tempering the inspected material, finish-cutting and forming gear teeth on the material, carburizing the material, performing secondary stabilizing heat treatment of the carburized material, and polishing and finally inspecting the material. [Reference numerals] (AA) Raw material; (BB) Forging, processing, UT; (CC) Welding of a plate and a boss, roughing; (DD) Gearing, precise grinding of a plate boss; (EE) Gearing and shrink-fitting of a plate; (FF) Gearing and welding of a plate; (GG) Heat treatment for removing stress from a welding gear; (HH) Inspection after welding(UT); (II) Q&T heat treatment, MT; (JJ) Carburization(primary, secondary); (KK) Final inspection(UT, MT); (LL) Completion of manufacture |
