Defect Analysis of 42CrMo Steel Forged Shaft
A forged shaft produced by the company, made of 42CrMo steel with a net weight of 15 tons and using a 24-ton steel ingot, underwent the following production process: Vacuum smelting → casting → forging → post-forging heat treatment → rough machining → ultrasonic testing → quenching and tempering → semi-finish machining → ultrasonic