Abstract：he Φ22mm size 10B21 cold crucible steel had cold cracking during the production of standard parts.The reasons for cracking of cold headings were analyzed by metallographic examination and SEM scanning. The main reason for the cracking of cold heading was the local carbon addition behavior of wire rods.The pearlite content in the carbon increase area was significantly higher than that in the matrix. The plasticity and toughness of the Φ22mm size 10B21 cold crucible steel decreased, and it was torn along the weak areas during the cold crucible deformation.In view of this situation, the carbon-removal behavior of slabs in the continuous casting process was analyzed and studied.By adopting the electromagnetic stirring of the crystallizer and the automatic liquid level control technology, the casting is poured at a constant speed so as to prevent the slag from being removed during the casting to eliminate carbonation on the surface of the casting blank.
2019, Vol. 38 