Method for preparing Fe-W intermediate alloy through electron beam smelting and high purification

Abstract

The invention discloses a method for preparing a Fe-W intermediate alloy through electron beam smelting and high purification. The method comprises the following steps of carrying out electron beam smelting on raw materials in a water-cooled copper smelting crucible to obtain molten alloy; pouring a part of molten alloy in the water-cooled copper smelting crucible into a water-cooled copper solidification crucible, when the amount of the molten alloy poured into the water-cooled copper solidification crucible at the moment can meet the thickness requirement after solidification, reducing the beam current power to solidify the molten alloy in the water-cooled copper smelting crucible, keeping a red-heat state until molten alloy not flows, and meanwhile, and rapidly solidifying the molten alloy in the water-cooled copper solidification crucible; increasing the beam current power, so that the alloy in the red-heat state in the water-cooled copper smelting crucible is completely molten; and repeating the above steps until the molten alloy in the water-cooled copper smelting crucible is exhausted to obtain the Fe-W intermediate alloy in the water-cooled copper solidification crucible. According to the method, the metallurgical quality of the Fe-W intermediate alloy ingot can be greatly improved, meanwhile, the content of impurity elements C and P in the alloy is reduced.

Description

technical field [0001] The invention relates to an alloy preparation method, in particular to a high-purification method for preparing Fe-W master alloy by electron beam smelting. Background technique [0002] Master alloys are often used as additives for melting related alloys due to factors such as relatively low melting point and relatively stable chemical properties. Among them, Fe-W alloy is a very important one, and the use of the master alloy reduces the melting temperature and production cost. At present, the Fe-W alloys on the market are divided into two categories: FeW75 generally contains tungsten at about 70% to 80%, impurity content C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.5% , Mn≤0.25%; FeW80 generally contains 75% to 85% tungsten, impurity content C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.7% and Mn≤0.25%. It can be seen that the impurity content is high. In addition, macroscopic component segregation is easy to occur, such as Fe-W produced by using ferrosilicon and aluminum a...

AI Technical Summary

Problems solved by technology

If you directly add highly purified W elemental elements, it will undoubtedly increase the cost and increase the requirements for equipment

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