Causes and Countermeasures of Burr Defects on the Core Surface of GCr15 Set Forging
In this paper,combined with the forging process of bearing steel ring,the causes of burr defects in the core of the forging were analyzed by means of pickling and metallographic analysis.It was proposed to improve the solidification structure of the billet by using large section continuous casting billet,low casting speed and low superheat casting,supplemented by electromagnetic stirring and end pressing in the production process.The rolling process uses a larger compression ratio to further improve the internal structure of the steel,so that the steel has a dense structure,thereby improving the burr defects on the surface of the GCr15 forging process.
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