Effect of casting process on inner-wall band segregation of high-strength anti-sulfur pipe
The control of inner-wall band segregation is one of the difficulties in the production of high-strength anti-sulfur pipes.During the smelting process of high-strength anti-sulfur pipe,comparative tests of different casting processes(superheat,mold electromagnetic stirring(M-EMS),end electromagnetic stirring(E-EMS),casting speed,etc.)were carried out.The microstructures of continuous casting billet,hot-rolled,and tempered tubes were analyzed by metallographic microscope and scanning electron microscope.The mechanism and evolution law of inner-wall band segregation of high-strength anti-sulfur pipe were studied,and the influence of different casting processes was also explored.