Industrial Experiment for Smelting H13 Die Steel by Direct Alloying with Molybdenum Oxides in EAF

Abstract

A new process of making steel by direct alloying with molybdenum oxides has been regarded in years. The characteristic of the new process is by using of the cheaper molybdenum oxides powder as alloy agent which can improve the flexibility of choosing main raw materials. The implementation of the process can reduce the production cost, protect environment and improve the economic profits and social benefits. In this study, an industrial experiment for direct alloying by using of molybdenum oxides was carried out, and the technological process appeared as follows: EAF (30t) → LF (30t) → VD → ESR →Rolling. Results show that throug the new smelting process quality of ingots meets the requirements of H13 die steel, meanwhile, [O], [H] and [N] contents in molten steel reach a low level compared to traditional smelting process. Therefore, it is feasible to smelt H13 die steel by using of molybdenum oxides instead of ferromolybdenum.