Preparing forged parts having a tensile strength and high elongation, comprises forming forged parts from a wire rod, heating forged parts up to a temperature of specified range, and subjecting forged parts to first and second tempering

摘要

The process for preparing forged parts (4) having a tensile strength and high elongation, comprises forming forged parts from a wire rod (3), heating forged parts at 830-900[deg] C, and subjecting forged parts to first and second tempering at 100-300[deg] C and 300-400[deg] C respectively. The forged parts are soaked in a salt bath for 60-130 minutes and 30-120 minutes during the first and second tempering respectively. The forged parts are pre-heated at 550-650[deg] C for 30-90 minutes before heating. The forged parts are formed by subjecting the wire rod to a first spheroidization annealing. The process for preparing forged parts (4) having a tensile strength and high elongation, comprises forming forged parts from a wire rod (3), heating forged parts at 830-900[deg] C, and subjecting forged parts to first and second tempering at 100-300[deg] C and 300-400[deg] C respectively. The forged parts are soaked in a salt bath for 60-130 minutes and 30-120 minutes during the first and second tempering respectively. The forged parts are pre-heated at 550-650[deg] C for 30-90 minutes before heating. The forged parts are formed by subjecting the wire rod to a first spheroidization annealing, firstly collecting and covering the wire rod, subjecting the rod to an intermediate stretching and then to a second spheroidization annealing, secondly collecting and covering the steel wire rod, subjecting the rod to surface hardening by stretching, and forging and then threading the rod by stamping and rolling to form the forged part.