Process control of alloy steel castings

- Sep 06, 2018-

During the operation of alloy steel castings, liquid metal is mainly cast into the casting cavity corresponding to the shape of the part. After cooling and solidifying, the part or blank can be obtained.


Process control of alloy steel castings


Melting period of control: when to operate its main task is based on the least power consumption effectively its solid rapidly melting furnace charge for homogeneous liquid, burden of melting at the same time, also produces a variety of physical and chemical reaction in molten pool, mainly include: volatile elements and oxidation, molten steel suction, heat transfer and loss and inclusion floatation.Therefore, the pre-melting slagging covering the liquid steel can not only reduce the heat dissipation, reduce the suction of liquid steel, but also promote the floating of inclusions.


Control of oxidation period: the CO or (CO+CO2) bubbles produced during the decarburization process of alloy steel casting during oxidation period. The bubbles formed by oxygen bubbles that have no time to take part in the reaction when oxygen is blown and the bubbles formed by direct blowing of inert gas or pure CO gas into the molten pool will rise and escape, causing boiling in the molten pool and creating conditions for the removal of hydrogen and nitrogen.



Reduction period: the control of basic electric arc furnace reduction period, alloying and main task is to deoxidizing and desulfurizing molten steel composition and final adjustments liquid steel temperature, in fact, the reduction phase of the completion of various tasks are interconnected, and at the same time, the steel liquid deoxidation, desulfurization, and chemical stability, also has a high rate of gold element, thus DNA is a key link in the process of reduction period refining operations.