Smelting: In order to obtain more pure molten steel, re […]
Smelting: In order to obtain more pure molten steel, reduce the gas content and the content of harmful elements. At the same time, due to the presence of easily oxidizable elements such as Al and Ti in some alloys, non-vacuum smelting is difficult to control. In order to obtain better thermoplasticity, nickel-based heat-resistant alloys are usually smelted in a vacuum induction furnace or even vacuum induction smelting. Add vacuum consumable furnace or electroslag furnace to remelt for production.
In terms of deformation: forging and rolling processes are used. For alloys with poor thermoplasticity, they are even rolled after extrusion and billeting or direct extrusion processes with stainless steel sheathing. The purpose of deformation is to break the casting structure and optimize the microstructure.
Casting: usually use vacuum induction furnace to smelt the master alloy to ensure the composition and control the gas and impurity content, and use the vacuum remelting-precision casting method to make parts.
Heat treatment: Deformed alloys and some cast alloys need to be heat-treated, including solution treatment, intermediate treatment and aging treatment.
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