PRODUCTION OF COLD DRAWN WIRE ROD OF HIGH CARBON CHROMIUM BEARING STEEL

摘要

PURPOSE: To product a cold drawn wire rod of high quality high carbon chromium bearing steel in a low cost with a simplified producing process. ;CONSTITUTION: The high carbon chromium bearing steel rolled material composed of the precision rolled material having within 0.15mm tolerance of the rolled size is spheroidizing-annealed to make the hardness ≤HRB 92 and thereafter, pickling and coating treatment are executed. Successively, the finish wire drawing having 3-13% reduction of area by the cold drawing and a flaw detecting test are executed, and the cold drawn wire rod of high quality high carbon chromium bearing steel having HRB 90-98 is obtd.;COPYRIGHT: (C)1996,JPO